Euphytica (EUPHYTICA )

Publisher: Springer Verlag

Description

Euphytica is an international journal on theoretical and applied aspects of plant breeding. It publishes critical reviews papers and short communications on the results of original research related to plant breeding. The integration of modern and traditional plant breeding is a growing field of research using transgenic crop plants and/or marker assisted breeding in combination with traditional breeding tools. The content should cover the interests of researchers directly or indirectly involved in plant breeding at auniversities breeding institutes seed industries plant biotech companies and industries using plant raw materials and promote stability adaptability and sustainability in agriculture and agro-industries.

  • Impact factor
    1.64
    Hide impact factor history
     
    Impact factor
  • 5-year impact
    1.88
  • Cited half-life
    0.00
  • Immediacy index
    0.15
  • Eigenfactor
    0.01
  • Article influence
    0.50
  • Website
    Euphytica website
  • Other titles
    Euphytica
  • ISSN
    0014-2336
  • OCLC
    1568375
  • Material type
    Periodical, Internet resource
  • Document type
    Journal / Magazine / Newspaper, Internet Resource

Publisher details

Springer Verlag

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Author's pre-print on pre-print servers such as arXiv.org
    • Author's post-print on author's personal website immediately
    • Author's post-print on any open access repository after 12 months after publication
    • Publisher's version/PDF cannot be used
    • Published source must be acknowledged
    • Must link to publisher version
    • Set phrase to accompany link to published version (see policy)
    • Articles in some journals can be made Open Access on payment of additional charge
  • Classification
    ​ green

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Drought is among sweetpotato production constraints in sub-Saharan Africa. Two studies were conducted on 15 F1 sweetpotato families (G1-G15) generated using a half-diallel mating scheme of six parents. The first experiment was conducted at Kenya Agricultural Research Institute (KARI), Kiboko, using split plot design under drought stress and no drought stress replicated twice and repeated thrice between January 2012 and June 2013. The second study was conducted in the screen house at KARI, Muguga using randomized complete block design. General combining ability (GCA) and specific combining ability (SCA) effects for storage root yield (FSR), total biomass (BIO), harvest index (HI), marketable number of storage roots (MNR) and root dry matter (%RDM) were significant (P ≤ 0.05) under both conditions. GCA/SCA ratio for FSR, HI, and %RDM under both conditions, ranged 0.51–0.76, thus, additive gene effects were more important than non-additive genes effects. G15, G5 and G7 had the highest significant (P ≤ 0.05) FSR SCA effects under drought stress while G15, G7, and G12 had the highest under no drought stress. Progenies G8-8, G15-5 and G15-8, had the highest FSR mid and best parent heterosis ranging 117.8–269.6 % under drought. Drought susceptible parents P3, P4 and P5 had the highest yielding crosses under drought,which were also high yielding under no drought [G15 (P3 × P5) and G5 (P4 × P5)]. Thus, these parents probably were carriers of the drought tolerant genes (heterozygous recessive). This suggests that the drought tolerance alleles could be homozygous recessive, which may be confirmed in further studies.
    Euphytica 02/2015; 201(3).
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    ABSTRACT: Verticillium wilt, caused by Verticillium dahliae, is a soil-borne disease of the cultivated eggplant (Solanum melongena). The accession PI388846 from a wild species S. linnaeanum, shows resistance to Verticillium wilt. The introgression of its disease resistance gene into cultivated eggplants would allow for breeding disease resistant eggplants. In this study, interspecific hybridization and subsequent backcrossing between PI388846 and cultivated eggplants were performed. The results showed that Verticillium wilt resistance was successfully introduced into the cultivated eggplants, and the agronomic traits of the interspecific hybrid progeny were improved by continuous backcrossing with the cultivated eggplants. In addition, a gene specific marker for the Ve homolog in PI388846 was developed to detect Verticillium wilt resistance in the backcross population. The results represent a positive beginning for the genetic enhancement of cultivated eggplants for Verticillium wilt resistance.
    Euphytica 02/2015; 201(3).
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    ABSTRACT: The QTL analysis of dead leaf rate (DLR) and dead seedling rate (DSR) during the seedling stage under salt or alkaline stress were conducted, in order to provide the scientific basis for the fine mapping and cloning of QTLs associated with salt or alkaline tolerance, and for the salt or alkaline tolerance of SSR marker assisted rice breeding. The recombinant inbred line (RIL) population F8 including 200 lines derived from the cross “Yiai 1 × Lishuinuo” were used in the study. The DLR and DSR of RIL and its parents were evaluated under 1.5 % NaCl of salt stress and pH8.7 to pH8.9 of alkaline stress, respectively. The results showed that DLR was a quantitative trait controlled by multiple genes, and DSR was a quantitative trait controlled by a few major genes and many other minor genes together under salt stress; DLR and DSR under alkaline stress were quantitative trait controlled by multiple genes. The genetic linkage map with 155 SSR markers which overlay the whole rice genome of 1541.5 cM and with the average distance of 9.95 cM between each two markers was constructed. Seven additive QTLs and three pairs of AA epistatic QTLs associated with DLR and DSR under salt or alkaline stress were identified, Of them, qDSRs8 - 1 with LOD of 6.54 and observed phenotypic variance of 15.96 % under salt stress, and qDLRa5 - 3 with LOD of 3.51 and observed phenotypic variance of 8.32 % under alkaline stress were new detected QTLs, which can be used in the breeding program in rice to get salt or alkaline tolerance rice cultivars in the future. The results also showed that excellent gene resource could be detected from any one rice germplasm; mechanisms for salt tolerance and alkaline tolerance in rice was different; additive QTLs were closely related with the resistance to salt injured in rice but epistatic effects of AA were closely related with the resistance to alkaline injured in rice.
    Euphytica 02/2015; 201(3).
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    ABSTRACT: Soil waterlogging is a primary constraint to crop yield both globally and in the United States, yet little is known about the genetic control of waterlogging tolerance in wheat. The objective of this study was to characterize genetic variation for key adaptive traits influencing waterlogging tolerance at the vegetative stage and to identify associated quantitative trait loci (QTL). Traits measured included shoot and root biomass, root length, tiller number, seedling height, stem elongation, and chlorophyll content. Waterlogging reduced traits means by 8–58 % in the greenhouse and by 22–32 % in the field, with the largest reduction observed for root length. Both root biomass and root length showed significant genotype by treatment interaction indicating an adaptive growth response in waterlogged versus non-waterlogged soils and a possible mechanism of tolerance. A positive correlation was observed between chlorophyll content and shoot biomass, and between root and shoot biomass under waterlogging, which may make indirect selection possible. QTL analysis identified 48 individual QTL that clustered into 10 genomic regions consistently detected in both the greenhouse and field experiments. While most clusters were constitutively expressed, regions on chromosomes 1B and 6D were found to be adaptive to conditions of soil waterlogging, with no QTL detected in the non-waterlogged controls. A QTL region on chromosome 1D specific for chlorophyll content was significant across environments and repeated measurements, explaining up to 24 % of the phenotypic variation. This study provides the first reported QTL for waterlogging tolerance in wheat identified under both field and greenhouse conditions. The QTL can be targeted by breeders for future genetic improvement.
    Euphytica 02/2015; 201(3).
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    ABSTRACT: Common wheat is unique in providing a large number of diverse end-products, including chapati, biscuits, bread and noodles. Grain weight and other grain traits contribute to grain yield and milling quality. Many earlier QTL studies reported at least 332 QTLs for grain traits including grain weight. We conducted a QTL analysis (composite interval mapping) of grain traits using a set of 92 recombinant inbred lines (RILs) derived from a cross between Rye Selection 111 (superior grain traits) and Chinese Spring (inferior grain traits). Forty-five QTLs for six grain traits, on 19 of the 21 chromosomes (except 2D and 3D) were identified. Nineteen of these QTLs, each for 2–3 traits were located on six chromosomes (2A, 3B, 6B, 6D, 7A and 7D). The pleiotropic nature or tight linkage of QTLs controlling different correlated traits (except the one on 6DS) was confirmed by joint MCIM. Meta-QTL (M-QTL) analysis of grain traits (including grain weight) was conducted using earlier reported QTL results (including QTLs reported in the present study). From this analysis, 23 M-QTLs were identified on eight chromosomes. These results were compared with those of our current QTL analysis and previous studies; three M-QTLs were identified as relatively more important for molecular breeding and will facilitate further work on genetic architecture and cloning of QTLs for grain traits including grain weight.
    Euphytica 02/2015; 201(3).
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    ABSTRACT: Gibberellic acid (GA) plays an essential role in many plant growth and developmental processes. Overexpression of rice (Oryza sativa L.) HOMEOBOX4 (OsHox4) gene in rice variety IR64 under the control of CaMV 35s promoter caused varying degrees of dwarfism and bushy tillers. Further investigation showed that over-expression of OsHox4 in indica rice induced semi-dwarf by repressing stems cell elongation. This repression could be eliminated by exogenously applied Gibberellin-4 (GA4) suggested that OsHox4 was involved in GA metabolism. Investigations of the expressions of rice DELLA-like subfamily genes, GA 3-oxidase family genes and GA 2-oxidase family genes by qRT-PCR showed that OsHox4 played an important role in GA deactivation and signaling by controlling the expression of rice DELLA-like subfamily genes, rice GA 2-oxidase family genes and rice GA 3-oxidase family genes. Our experiment provided an evidence that over-expression of OsHox4 in transgenic rice resulted in a semi-dwarf phenotype that could be fully rescued by application of exogenous GA4. The OsHox4 plays an important role in GA deactivation by controlling the expression of rice DELLA subfamily genes, rice GA 2-oxidase family genes and rice GA 3-oxidase family genes.
    Euphytica 01/2015; 201(1).
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    ABSTRACT: To enrich the source of germplasm of cultivated olive (Olea europaea subsp. europaea L.), inter-subspecific hybrid plants have been produced by experimental crosses between several varieties of cultivated olive and Asian and African accessions of the wild related subspecies cuspidata. Germination of putative hybrid seeds was enhanced by using in vitro embryo culture. The genetic make-up of germinated seedlings was assayed with the aid of both AFLP and SSR molecular markers and their hybrid nature was proved by the presence of male-specific alleles in their molecular patterns. Most of the parent specific alleles showed segregation among F1 progenies indicating high heterozygosity content of the parental lines. The majority of the hybrids derived from crosses in which an African accession of cuspidata was used as female parent. The overall morphological aspect of hybrids resembled that of the female parent. The production of inter-subspecific hybrid plants in Olea is discussed in relation to the genetic improvement of cultivated olive.
    Euphytica 01/2015; 201(2).
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    ABSTRACT: Understanding the inter-play plant–pollinator is essential to develop ecosystem services of faba bean and improved populations for low-input systems. We analyzed the phenotypic selection exerted by pollinators on floral traits involved in the plant pollinator inter-play. We test whether variation in pollinator-related floral traits is associated with differences among plants in seed production patterns. We used open pollination and pollinator-exclusion environments to examine pollinator mediated selection and selection for autonomous selfing in six gene-pools of Vicia faba over three consecutive years. We recorded, by using Digital Image Analysis, functional floral traits related to attraction, sexual dimension, and vector matching/pollen transfer efficiency. Nine production components were measured to categorize seed production patterns. Our approach used a series of Multivariate Regression Analyses (MRA) to explore which floral traits provided the best models to explain seed production patterns in each gene-pool and pollination environment. MRA showed that variation in the incidence of pollinator-mediated selection on floral traits or in the selection for autonomous selfing can substantially contribute to differences in seed patterns. The underlying floral mechanisms are specific to the gene-pool and largely unrelated among gene-pools. Consistent results among gene-pools involved no evidence of pollinator-mediated selection as result of the floral traits under study on the main predictors of crop yield, pods and seeds per plant. However, relevant predictors of crop yield such as pod length and seed dimensions and weight were pollinator-dependent because of pollinator-mediated selection on sexual dimension, floral display and vector matching traits. We caution against dismissing pollinator-mediated selection as driver of seed production patterns variation which may be influenced by the gene-pool and by the gene-pool × pollination environment interaction.
    Euphytica 01/2015; 201(2).
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    ABSTRACT: In order to exploit the induced female 2n gametes for cassava (Manihot esculenta) breeding, a detailed histological observation of female gametogenesis was conducted to correlate with the morphological characteristics of inflorescences and female flower buds. The SC5 gynoecia at the stage of prophase I were selected for unreduced megaspores induction with 0.3 % colchicine and 1 % dimethyl sulfoxide-soaked cotton plugs for 2 days. The resulted female cyathia were artificially pollinated with ploidy-level mixed pollens of SC10. Out of 250 hybrid progenies, two plants which exhibited morphological variations were confirmed as sexual tetraploids by flow cytometry and chromosome counting. Our results demonstrated that induction of 2n gametes combined with hybridization can be an effective approach for sexual tetraploid production for cassava.
    Euphytica 01/2015; 201(2).
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    ABSTRACT: Yield losses of maize due to drought stress (DS) in environments with limited rains can reach 100 %. Introgression of favorable alleles from diverse landraces into adapted elite varieties will improve performance, hence reducing losses. The objective of this study was to assess the performance of BC populations under DS and multiple locations (ML) after introgression of alleles from diverse maize landraces into an elite variety. Twelve backcross (BC1F2) populations together with their recurrent parent (TZLCOMP4C1) and a commercial hybrid (Oba Super1) were evaluated under DS, well watered (WW) conditions during the dry season, and in seven ML trials in Nigeria. Significant differences were observed among genotypes for all traits except for ear aspect score under DS conditions. Grain yield and most agronomic traits measured were highly significant (p 1F2 populations had similar mean grain yield compared to their recurrent parent. Four of these populations produced 3–7 % more grains than the recurrent parent. Yield improvement was accompanied by reduced barrenness, days to flowering, plant height and ear placement, and good plant and ear aspect scores. The eight BC1F2 populations should be subjected to recurrent selection under controlled DS, while four other BC1F2 populations with low grain yields could be subjected to additional backcross to increase frequency of favorable alleles for improved performance in stress environments. The resulting improved populations can be invaluable source materials for developing drought tolerant varieties and parental lines of hybrids.
    Euphytica 01/2015; 201(1).
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    ABSTRACT: Cotton is an important fiber crop worldwide. Improved fiber quality is a driving force for cotton genetic studies and breeding. A BC1 population containing 115 individuals from a cross between Gossypium hirsutum cv. CCRI8 and G. barbadense cv. Pima 90-53 was established, and 519 simple sequence repeat (SSR) markers, two conserved intron-scanning primers (CISPs), and transcript-derived fragments (TDFs) amplified from 156 ApoI/TaqI selective primer combinations were used to construct a genetic linkage map. The map included 579 markers distributed on 56 linkage groups. Accounting for 83.4 % of the cotton genome, it covered 4,168.72 cM, with an average distance of 7.19 cM between markers. Lengths of the linkage groups ranged from 1.25 to 255.79 cM, with 2 to 44 markers per group. Of these 56 groups, 43 were assigned to 26 chromosomes, with the remaining 13 unknown. Based on this newly constructed map of tetraploid cotton, we performed quantitative trait loci (QTL) mapping and analysis of fiber quality traits from the BC1 and its derived BC1F2 lines. A total of 44 fiber quality QTL were detected on 17 chromosomes, explaining 7.72–23.73 % of the phenotypic variation. Pima 90-53 offered 13 QTL alleles with positive additive effects and four with negative additive effects for fiber quality traits. The results from this study may provide useful information for breeders to transfer desirable fiber traits from cotton types, such as the Sea Island strain, to Upland cotton that is primarily cultivated currently.
    Euphytica 01/2015; 201(2).
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    ABSTRACT: Salinity is globally a major constraint for crop production. Breeding for salinity tolerance is an effective approach to improve crop production and productivity under saline conditions provided it is based on a good understanding of the genetic control of salinity tolerance. This study deals with mapping QTLs for salinity tolerance in durum wheat (Triticum durum) by association analysis using SSR markers. A total of 119 varieties were treated in 100 mM of NaCl solution and the salinity tolerance indices (STI) for several traits were calculated as parameters to assess salinity tolerance. Among the traits assessed, the increased proportion of dead leaves (%DL) was the most suitable parameter for assessment of salinity tolerance in durum varieties at early vegetative stages because of a broader range of variation among varieties and narrower range of variation within varieties compared to other traits. The QTL associated with salinity tolerance using %DL as a parameter was detected on chromosome 4B. An additional 11 QTLs associated with seven parameters using STI of other traits were detected on chromosomes 3A, 5A, 5B, 6A and 7A.
    Euphytica 01/2015; 201(1).
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    ABSTRACT: Dwarfing genes play a major role in development of semi-dwarf cultivars of various cereals, but in rye this type of cultivar is still not common. Several recessive and dominant dwarfing genes in rye have been reported. Among the known dominant dwarfing genes in rye, two are well characterised: Ddw1 from the 5RL chromosome and Ddw2 located on 7R. This study was aimed at characterisation of the K11 source of dominantly inherited dwarfism found in plant materials grown in the Plant Breeding and Acclimatization Institute (Radzików, Poland). Mapping analyses in this study indicate that the dominant dwarf gene under investigation is located on the 1RL chromosome and is independent from previously known genes. The gene was named Ddw3. Phenotypic effect of the Ddw3 was tested on two pairs of near-isogenic lines. Six morphological traits were analysed in two or three growing seasons: plant height, length of the second internode from the base, number of internodes, tillering, spike length, and number of spikelets per spike. No negative or weak influences on yield-related traits were observed. The examination of the dwarf plants’ reaction to seedling treatment by gibberellic acid solution revealed sensitivity of Ddw3 to this growth regulator. This report is the first evidence of the dominant Ddw3 gene in rye and its presence on the 1R chromosome.
    Euphytica 01/2015; 201(1).
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    ABSTRACT: Oryza glaberrima accessions harbor genes for tolerance to abiotic stresses such as mineral deficiency in problem soils. This genetic potential could be exploited in interspecific crosses with Oryza sativa, as in the case of the ‘New Rice for Africa’ (NERICA) varieties; however, to attain this goal it would be desirable to develop a high-throughput marker system to specifically detect O. glaberrima introgressions in an O. sativa background. Therefore, a single nucleotide polymorphism (SNP) genotyping analysis of an O. glaberrima accession (CG14) with two O. sativa lines (WAB56-104 and WAB181-18) was performed on a genome-wide basis. Comparison of CG14 and the WAB lines resulted in a set of 9,523 polymorphic SNPs which would be suitable to detect O. glaberrima introgressions in upland NERICAs. In addition, a set of 1,540 polymorphic SNPs between O. glaberrima versus O. sativa was identified. A subset of SNPs which were evenly distributed in the genome was then used to design a flexible and cost-effective SNP genotyping panel using the Competitive Allele-Specific PCR technology (KASP). This SNP genotyping panel consists of 2,015 SNPs successfully converted into KASP markers, providing 745 polymorphic SNPs for the parents O. glaberrima CG14/O. sativa WAB56-104 (upland NERICA), and 752 for O. glaberrima TOG5681/O. sativa IR64 (lowland NERICA). KASP markers were successfully validated by mapping O. glaberrima introgressions in NERICA-derived breeding lines. This new SNP genotyping panel will be useful in modern breeding applications such as QTL mapping and/or marker-assisted selection.
    Euphytica 01/2015; 201(1).
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    ABSTRACT: Soybean (Glycine max (L.) Merr.) is a major source of plant protein for humans and livestock. Deficiency of sulfur-containing amino acids (cysteine and methionine) in soybean protein is a main limitation of soybean meal as an animal feed ingredient. The objectives of this study were to identify and validate quantitative trait loci (QTLs) associated with cysteine and methionine contents in two recombinant inbred line (RIL) populations, and to analyze the genetic effects of individual QTLs and QTL combinations in soybean. Both the mapping population of SD02-4-59 × A02-381100 and validation population of SD02-911 × SD00-1501 were evaluated for cysteine and methionine contents in multiple environments. Correlation analysis indicated that there was a highly positive correlation between cysteine and methionine contents. Significant positive correlations were also observed between the sulfur-containing amino acid contents and protein content. In the mapping population, eight QTLs for both cysteine and methionine contents were consistently detected in any individual environment and the average data over all three environments. Three of these QTLs were confirmed in the validation population. A comparison with the previous studies indicated that most of the genomic regions linked to the QTLs for the sulfur-containing amino acids were also associated with protein content. Cumulative effects of multiple QTLs for the traits were significant in both populations. This information should be useful for the improvement of the levels of protein and amino acids in soybean seeds.
    Euphytica 01/2015; 201(2).
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    ABSTRACT: Parthenocarpy is becoming an essential trait for off-season greenhouse production of Zucchini squash. Given that winter conditions promote a reduction in the number of male flowers and in the activity of pollinators, the application of synthetic auxins is currently the most widespread method to induce fruit set. We have evaluated the parthenocarpic tendency of 48 long-fruited accessions of Cucurbita pepo spp. pepo, from morphotypes Zucchini, Vegetable marrow and Cocozelle, including 45 traditional cultivars and 3 commercial hybrids, with the goal of identifying new sources of parthenocarpy for breeding programs. After the first screening, 20 selected accessions were evaluated for the growth rate of unpollinated fruit. Twelve of the selected accessions identified as either strongly parthenocarpic or non-parthenocarpic, were compared for fruit rate growth, ethylene production and ethylene sensitivity. Apart from the three control hybrids, the fastest parthenocarpic fruit growth was observed in 'CpCAL112', 'CM-37', 'E-27', 'PI261610', and 'V-185'. The source of the parthenocarpy of some of these accessions differs from that of the hybrids as it was not associated with the conversion of female into bisexual flowers or with the so-called "fruits with attached flowers" syndrome, which is an undesirable trait in current parthenocarpic hybrids. The alternative sources of parthenocarpy may be of great importance in current Zucchini breeding programs. We also demonstrate that the parthenocarpy of these accessions is associated with downregulation of ethylene production in unpollinated fruits during the first days post anthesis (DPA). In non-parthenocarpic accessions, unpollinated fruits boosted ethylene production at 3 DPA, concomitantly with fruit abortion and senescence, while in parthenocarpic accessions, fruits produced little ethylene at 3 DPA. Therefore, ethylene production in ovaries/fruits at 3 DPA can be used as a marker to identify and select parthenocarpy in Zucchini squash. However, in the cultivars tested here, ethylene production and sensitivity in vegetative organs and in male flowers earlier than 3 PDA do not appear well associated with parthenocarpy. © 2014 Springer Science+Business Media Dordrecht.
    Euphytica 12/2014;
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    ABSTRACT: Improvement of protein and starch quality is an important breeding objective for various wheat-based end products. The objectives of this study were to identify quantitative trait loci (QTLs) for flour protein content, wet gluten content, residue gluten content, gluten index, sedimentation volume, and rapid viscosity analysis parameters using two mapping populations. A total of 56 and 77 additive QTLs were detected in the NG population (derived from Gaocheng 8901 and Nuomai 1) and the SG population (derived from Shannong 01-35 and Gaocheng 9411), respectively. Of these QTLs, 20 additive QTLs from NG and 34 additive QTLs from SG accounted for more than 10 % of the phenotypic variance. All of the QTLs were distributed on 19 wheat chromosomes. At least 13 QTLs were detected in both environments in the two populations. Six pairwise common QTLs were found in the two populations. This study identified eight QTLs clusters (the number of QTLs ≥2) from NG and four QTLs clusters from SG. There was an important location flanking markers Glu-D1 and wPt3743 on chromosome 1D, which showed that they are pleiotropic or co-located QTLs. Most of the QTLs had higher phenotypic variation (>10 %). This study will facilitate the generation of improved wheat varieties with good quality via molecular-marker-assisted breeding.
    Euphytica 12/2014;