Gurteg Singh

Punjab Agricultural University | PAU · Department of Fruit Science

The present study was undertaken to generate variability in Kinnow (Citrus nobilis Lour × C. deliciosa Tenora) using gamma radiation. Four hundred buds of Kinnow were irradiated at 30 Gy and budded on rough lemon rootstock in February 2007. The resulting 188 MV 1 plants were planted in the field in October 2009 and observations in the present trial...

The leaf morpho-anatomical studies were performed to assess the genetic divergence in mandarin (Citrus reticulata Blanco) germplasm and for obtaining a strong descriptor (s) to help in easy identification among closely related genotypes during the year 2017–18. Morphological traits of mature leaves of mandarin accessions were observed on basis of c...

An experiment on drip irrigation scheduling based on pan evaporation replenishment was conducted in Kinnow orchard at Punjab Agricultural University, Ludhiana during 2010-2018. Year was divided into six stages (stage 1 to stage VI) including two months in each stage. First treatment included irrigation scheduling with 30 and 40% ER, treatment two w...

Genetic diversity analysis of 46 commercially prominent mandarins grown in different countries was carried out based on molecular and fruit traits. Out of 110 SSR markers, 64 polymorphic markers amplified a total of 155 alleles. Twenty SSR primers revealed 20 unique alleles which generated DNA fingerprints in 17 genotypes. The Polymorphism informat...

Kinnow mandarin is the predominant citrus crop of Punjab state. The area and production of Kinnow are increasing in the southern–western districts of the state because of its high adaptability, yield potential, and better fruit quality, which ensure higher economic returns to the growers. However, soils of sub-mountain and in some areas of central...

Aim: To assess genetic diversity and relationship among important horticultural traits in rough lemon (Citrus jambhiri Lush). Methodology: The study was conducted at Punjab Agricultural University, Ludhiana on seventeen strains of rough lemon. Data was recorded for vegetative, fruiting and productivity parameters. Genetic variability and relationsh...

Singh et al.: genetic variability and heritability among mandarin (Citrus reticulata Blanco) genotypes under Indian subtropical conditions-2913-APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH 20(4):2913-2930. Abstract. An effort has been made to study the genotypic variance, heritability, and genetic advance among nineteen mandarin genotypes grown under...

Aim: Methodology:

Manilkara achras L., commonly called sapota, is one of the major fruit crops commercially grown in India. Though India leads in world sapota production, the major problems in sapota are low fruit setting and yield. Hence, we studied these aspects in the commercially grown sapota cv. Kalipatti in Punjab conditions. The experiment was conducted t...

In this study, qualitative and quantitative characters were evaluated in 17 rough lemon strains. Leaf lamina length was recorded to be maximum in strain Australian (87.0 mm) and minimum in strain Katazamir (62.8 mm). Leaf lamina width ranged from 29.0 to 45.3 mm, spine length from 8.2 to 33.5 mm and leaf chlorophyll ranged from 49.1 to 62.7. Flower...

Management of Fruit drop in Kinnow in Punjabi

Nano-Enabled technologies

Agri-nanotechnology, an active and emerging field of research and development (R&D), hails research on improved and balanced nutrition through the use of nano-fertilizers, and targeted and sustained release of active ingredient from nano-pesticides. Furthermore, nano-interventions include proper monitoring of a variety of factors such as soil edaph...

Fourteen pummelo (Citrus maxima Merr.) fruit varieties were evaluated through morphological and molecular methods to determine the genetic diversity among them. The analysis showed that maximum contribution (60%) towards diversity was due to the number of fruits per tree and rag percentage. Principal component analysis explained 80.26% of the total...

The molecular verification of different intra-specific mandarin hybrids was explored during 2014–2015. Simple sequence repeat (SSR) markers were employed to identify putative zygotic seedlings from hybrid progeny produced from different crosses in mandarin. The most informative SSR marker in the F1 hybrids of ‘Daisy × Kinnow’ cross was CCSM170 whic...

The agro-ecological conditions of Punjab are best suited for the production of citrus fruits. Citrus cultivation has proved a boon for the farmers due to its higher economic productivity as compared to other fruit crops. Citrus fruits have emerged as number one, both area and production and has brought the “Golden Revolution” in the Punjab state. H...

Genetic divergence was studied in nineteen mandarin genotypes based on floral characteristics as per International Plant Genetic Resources Institute descriptors. The data revealed not much variation in qualitative floral traits, however, quantitative floral traits differed significantly among mandarin genotypes. Maximum mean flower diameter (27.10...

Ahmed et al.: Assessment of diversity in grapefruit (Citrus × paradisi) and tangelo (Citrus x tangelo) under Indian conditions using physico-chemical parameters and SSR markers-5343-APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH 16(5):5343-5358. Abstract. In a previous report, grapefruit (Citrus × paradisi Macfad.) and tangelo (Citrus × tangelo J.W. In...

ABSTRACT The present investigation on fruit set of sapota cv. Kalipatti was carried out to increase the fruit set and yield. Eight year old uniformly grown plants planted at 9 × 9 m2 spacing were sprayed with NAA @ 50, 75, 100 and 125 ppm and GA3 @ 25, 50, 75 and 100 ppm except T9 (water spray) and T10 (control) in the month of May, August and Sept...

This study was conducted to access the effect of hot water and sodium bicarbonate treatments on the storage performance of Kinnow under ambient conditions. The fruits were subjected to hot water treatments at different temperatures (45, 50 and 55°C), sodium bicarbonate at different levels (2% or 3%) and their combinations. The control fruits were k...

The present investigation was aimed to assess genetic diversity in citrus trifoliate rootstocks. The research work was carried out on five citrus trifoliate (Poncirus trifoliate and its hybrids) rootstocks. Their evaluation was done for characters as per IPGRI citrus descriptor. Most of the quantitative trees, leaves, flowers and fruit characters w...

Stage wise water requirement in Kinnow

Citrus is the most widely produced fruit group in the world. Abudant heterozygosis is present in most citrus forms. Breeding in citrus is highly complicated by heterozygosity and self-incompatibility, hence pieces of information on pollen viability and floral morphology are the ideal tools to select a superior genotype with better cross combination...

The investigation was conducted to evaluate the effect of different concentrations of indole-3-butyric acid (IBA) hormone on the rooting capacity and other morphological parameters of nursery plants raised through hard wood cuttings of Fig (Ficus carica L.) cv. Brown Turkey. Fifty cuttings with five replications in each treatment were planted in th...

The present work was aimed to study the in- vitro pollen viability of five citrus species viz., mandarin (citrus. reticulata Blanco) sweet orange (C. sinensis L. Osbeck) grapefruit (C. paradisi Macf.) pummelo (C. maxima Burm. Merr.) and tangelo (C. reticulata × c. maxima or × C. paradise). The pollen at different temperatures (4ºC, -20ºC, and -196º...

The atmosphere surrounding the earth is made up of nitrogen (78%), oxygen (21%) and the remaining 1%, is made up of trace gases that include carbon dioxide, methane and nitrous oxide. These gases also called greenhouse gases act as a blanket and trap heat radiating from the earth and make the atmosphere warm Climate change is a phenomenon due to wh...

This book is regarding Citrus cultivation in Punjab and is written in Punjabi

Assessment of genetic diversity in the available germplasm is the prerequisite for the development of improved genotypes through planned breeding programmes. In view of this, ten pummelo (Citrus grandis Merrill) genotypes maintained at College Orchard and Fruit Research Farm of Punjab Agricultural University, Ludhiana were evaluated for vegetative,...

The genetic diversity among nineteen mandarin genotypes was assessed at Punjab Agricultural University Ludhiana based on fruit chromicity scores. Colour parameters of fruit epicarp, pulp and juice were determined with the help of Hunter Lab colorimetric system as per IPGRI descriptors. The mean value of epicarp CCI was significantly higher (11.91)...

The relationships between fruit traits of some indigenous and exotic mandarin cultivars were studied during the year 2015-16.The study revealed highly signiicant positive correlation (r = +0.801) between fruit weight and fruit juice weight followed by fruit weight and segment length (r = +0.761); fruit weight and fruit juice percentage (r = + 0.731...

Based on morphological characterization, the performance of eighteen sweet orange, ( Citrus sinensis Obseck) cultivars were evaluated. On the basis of two year data, the maximum mean fruit weight (316.25 gm) was recorded in Moro, while the maximum mean fruit diameter and mean fruit length was recorded in Mosambi and Olinda Valencia (87.32 mm and 81...

Gamma irradiations are used widely to create genetic variation in the germplasm and to develop new varieties in plant breeding. As conventional hybridization programmes take too much time, it is desirable to go for mutation practices in fruit crops. Moreover, when all the other modes of creating variability are failed, it is easy for breeder to go...

The aim of present study was to access the pollen in- vitro germination of pollen grains of five citrus species belonging to the family Rutaceae viz., mandarin (citrus. reticulata Blanco) sweet orange (C. sinensis L. Osbeck) grapefruit (C. paradisi Macf.) pummelo (C. maxima Burm. Merr.) and tangelo (C. reticulata × C. maxima or × C. paradise) under...

Development of seedless Kinnow mutants through budwood irradiation

Varietal assessment is the pre requisite for the selection of superior genotypes through planned breeding programme. Since then six genotypes of pummelo were identified as superior genotypes. Wide variability in mean rootstock diameter (39.20 –102.43 mm), mean rootstock scion union ratio ( 0.83-1.15), mean leaf lamina length : width ratio (1.45- 1....

The book aims to address specific problems faced by citrus growers of Punjab.

Assessment of pollen viability is an essential tool to check the level of sterility as it limits sexual hybridization.The percentage of viable pollen of five grapefruit cultivars was evaluated. The viability percentage values ranged from 30.50% for ‘Marsh Seedless to 41.75% for ‘Ray Ruby’. The ‘Ray Ruby’ cultivar showed the highest percentage of vi...

The objective of the study was to document the molecular difference among Kinnow and newly developed low seeded Kinnow mutants (PAU Kinnow-1 and PAU Kinnow-2) based on their DNA fingerprinting

Molecular differentiation

Critical stage of water requirement in Kinnow

The relationships between fruit traits of some indigenous and exotic mandarin cultivars were studied during the year 2015-16.The study revealed highly signiicant positive correlation (r = +0.801) between fruit weight and fruit juice weight followed by fruit weight and segment length (r = +0.761); fruit weight and fruit juice percentage (r = + 0.731...

The study was aimed to assess the compatibility of intra-specific mandarin crosses and germination of F1 seeds under sub-tropical conditions of Punjab (India). Experiment was conducted at PAU, Ludhiana (Punjab) during 2014 and 2015. Six hundred crosses were made in each of four type crosses viz., ‘Daisy x Kinnow’, ‘Kinnow x Daisy’, ‘W. Murcott x Ki...

Morpho-physiological data of 16 sweet orange genotypes were subjected to cluster analysis and the tested genotypes were grouped into four clusters with cluster I and 11 showing maximum inter cluster distance. Cluster I, cluster 11, cluster IV and cluster III showed inter cluster distance of 0.58, 0.55, 0.52 and 0.30, respectively. This indicated di...

The present study was conducted to access the effect of different doses of gamma radiation on the storage performance of Kinnow fruits under ambient temperature conditions. Fruits were irradiated to gamma irradiation at different doses (75 Gy, 150 Gy, 225 Gy and 300 Gy). The control fruits were kept untreated and stored at room temperature for 0-21...

Genetic variability and fingerprint profiles of 19 indigenous and exotic mandarin genotypes introduced from different parts of India and USA were determined using 60 SSR markers. Of the 57 SSR markers amplified, a total of 96 alleles were detected by 39 polymorphic SSR loci and maximum 5 alleles were amplified with an average of 2.46 alleles per pr...

Morpho-physiological data of 16 sweet orange genotypes were subjected to cluster analysis and the tested genotypes were grouped into four clusters with cluster I and II showing maximum inter cluster distance. Cluster I, cluster II, cluster IV and cluster III showed inter cluster distance of 0.58, 0.55, 0.52 and 0.30, respectively. This indicated di...

Studies on genetic diversity based on IPGRI descriptors of 14 indigenous and five exotic mandarin genotypes introduced from different parts of India and USA were conducted. Quantitative data were analyzed using SAS (9.3 version) software and the data were also subjected to UPGMA analysis by using DARwin software. Statistically significant differenc...

Genetic variability and fingerprint profiles of 19 indigenous and exotic mandarin genotypes introduced from different parts of India and USA were determined using 60 SSR markers. Of the 57 SSR markers amplified, a total of 96 alleles were detected by 39 polymorphic SSR loci and maximum 5 alleles were amplified with an average of 2.46 alleles per pr...

In the present study eight varieties of fig (Ficus carica L) viz., Black Fig, Brown Turkey, Conadria, Deanna, Golden Celeste, King, Panachee and Texas were budded (inverted 'T' method) on seedlings of Brown Turkey in last week of August. Maximum budding success was recorded in variety King and Brown Turkey and the least success was obtained in Blac...

The development of nanotechnology creates an excellent opportunity to address complex technical issues of food supply chain. Failure to embrace nanotechnology will deny the horticultural sector an opportunity to capitalize on improved product visibility, food safety, quality and security and associated economic benefits. Agricultural and food suppl...

Fruit and shoot management in peaches (Prunus persica L.) is an important intervention to improve fruit quality and its yield. Studies were conducted through on-farm trials at farmer's fields in Ropar (Punjab) district during 2006-2009 to evaluate the technology of pruning and fruit thinning and its effects on crop yield and fruit quality in six-ye...

Fruit and shoot management in peaches (Prunus persica L.) is an important intervention to improve fruit quality and its yield. Studies were conducted through on-farm trials at farmer's fields in Ropar (Punjab) district during 2006-2009 to evaluate the technology of pruning and fruit thinning and its effects on crop yield and fruit quality in six-ye...

An on-farm study was carried out at six farmers’ field in Roopnagar (Punjab) district during rabi 2010-11 to determine the effect of age of seedlings and lag period to first irrigation on yield, seedling mortality rate, bolting and bulb weight of onion (Allium cepa L.) var. Punjab- Naroya. The trial was conducted in randomized block design. The tre...

An on-farm study was carried out at six farmers’ field in Roopnagar (Punjab) district during rabi 2010-11 to determine the effect of age of seedlings and lag period to first irrigation on yield, seedling mortality rate, bolting and bulb weight of onion (Allium cepa L.) var. Punjab- Naroya. The trial was conducted in randomized block design. The tre...

Frontline demonstrations were conducted on farmers field from 2003-04 to 2006-07 in Rupnagar district of Punjab for technological assessment in moong. The recommended technology in demonstrations increased yield over traditional practices to the extent of 13.5 percent. The extension gap was 0.90 q/ha. SML 668 and ML 818 were found to be best variet...

This investigation was conducted to study the differential absorption pattern of Potassium by some important cultivars viz., Perlette, Thompson Seedless, Harne Seedless, PAU-Hybrid, Madeleine Royale, Madeleine Angeveine and Lomanto. Different cultivars behaved differently with respect to uptake, peak levels and stables periods. Madeleine Angeveine...