Jayaprakash MOHAN Nidagundi

• Doctor of Philosophy
• Cotton Breeder and Head (AICRP on Cotton) and IPR cell & ABI unit at University of Agricultural Sciences Raichur

Maize is the second most important staple food crop in the world after wheat. For maize hybrid seed production, a prominent step is detasseling in the female parent, which is laborious, time consuming, and increases the hybrid seed cost by 15 to 20 percent. Hence, to overcome this problem, exploitation of male sterility in maize crops gains special...

Fiber trait is multigenic and each parent of the population carrying different genes aid in arriving at varied blend of association between yield and fiber quality traits. Eleven parental lines were crossed in half-diallel fashion to arrive at 55 hybrid combinations, which were evaluated under seven environments. The results manifested highly signi...

Heat stress severely affects maize yield and productivity, making it essential to identify and select heat-tolerant genotypes. Three hundred seven testcrosses derived from a biparental population were evaluated during summer at two distinct high VPD environments along with four checks (P1844, P1855, DKC9108 and DKC9162) to know their performance an...

Aims: To evaluation the Refugia in bag and structured refugia against bollworm complex in cotton. Study of Design: Bt cotton hybrid (KCH-14K59 BG II) and its non Bt counterpart was planted, following recommended agronomic practices. Six treatments were designed for the studies are detailed below: T1-100 % Bt, T2-100 % Non Bt, T3-20 % structured ref...

The pink bollworm (Pectinophora gossypiella), a significant pest affecting cotton crops, necessitates an optimized approach to insecticide application. This study investigates the critical factors of frequency and timing in insecticide application to enhance the efficacy of pest control Original Research Article Rakhesh et al.; Asian Res., focused...

The current study was focused on unravelling the genetic basis for seed cotton yield and yield attributing traits with an emphasis on isolating most potential germplasm accessions. A set of 192 cotton germplasm accessions were evaluated in augmented design for two seasons (2022 and 2023) in two different environments. The observations on yield and...

Plant breeders are always in pursuit of desirable genes and gene complexes, leading to identification of potential and promising individuals/segregants often exhibiting traits with higher intensity. Identifying segregants with desirable combination of multiple traits would enable a breeder to develop superior cultivars. In this study, combining abi...

Fusarium wilt (FW) is the most severe soil‐borne disease of chickpea that causes yield losses up to 100%. To improve FW resistance in JG 11, a high‐yielding variety that became susceptible to FW, we used WR 315 as the donor parent and followed the pedigree breeding method. Based on disease resistance and yield performance, four lines were evaluated...

In crop improvement, delineating inheritance pattern of a character guides a plant breeder to choose appropriate breeding procedure, which enables ease of improving phenotypic expression of the traits. To deduce the inheritance pattern of naked seed or fuzzless character, four parental lines involving two purely naked seed types (DHN-1 and DHN-10),...

Background: Chickpea is mainly grown on marginal lands and encounter the problem of erratic rainfall that causes lack of water availability especially at terminal growth stages. Exploration of yield stability and defining the adaptation domains of advance genotypes in different ecosystem is highly imperative for crop genetic improvement programs. D...

The field evaluation of various insecticides on major sucking pests of Bt-cotton during the 2022-23 season demonstrated significant reductions in pest occurrence across all treatments compared to the control. However, the efficacy varied depending on the insecticide used. Among all the treatments, Flonicamid 50 WG proved highly effective in managin...

Chickpea is a cool season, photothermal-sensitive crop, that is adversely affected by high temperatures (>35°C) and whose flowering is promoted by long-day conditions (>12 h). This prevents horizontal crop spread under a variety of agro-climatic conditions and the development of insensitive genotypes that perform well in all seasons. Therefore, a s...

Sterile Insect Technique (SIT) is the right eco-friendly method to overcome the pink bollworm Pectinophora gossypiella (Saunder) menace. In SIT attractiveness of released moths to their natural counterpart is most important as such this ability was examined in our study. For this, newly emerged five virgin female gamma irradiated with 0–250 Gy were...

Pink bollworm (PBW), Pectinophora gossypiella (Saunders) is one of the major constraints in achieving potential yield in transgenic cotton due to evolution of resistance against Bt toxins. In this context, the current research was planned and executed to delineate and map the preliminary basis of resistance in pink bollworm from major cotton growin...

Genetic diversity among coloured cotton genotypes in relation to their fibre colour and ploidy level based on SSR markers. Czech J. Genet. Plant Breed., 60: 12-24. Abstract: Genetic diversity is referred to as any variation at the phenotypic, DNA or genomic level of an individual, population or species. The appraisal of diversity is important to un...

Cotton (Gossypium hirsutum L.) is commonly referred as King of Fibre crops or White gold due to the huge market value and export significance. Several pests like sucking and bollworm complex severely inhibit the potential yield of the crop. Among these, Pink bollworm, Pectinophora gossypiella (Saunders) is of major significance in causing significa...

Developing cotton cultivars with high yields and superior fiber quality is a major goal of any cotton breeding program. The present study emphasized estimating and comparing genetic variability parameters in F2 generations derived from two double crosses and their four single crosses to isolate segregants with superior yield and fiber quality. High...

The pink bollworm incidence and adult male moth trap catches were monitored throughout the cropping period for four years from 2017-2021 on Bt cotton (KCH-14K59) at University of Agricultural Sciences, Raichur. The pink bollworm male moth activity (95 moths/trap) was more during the month of December month (49th SMW) with the highest larval inciden...

An attempt was made to test available formulation of fungicides and commercially available organic products for their efficacy under laboratory condition, an experiment was carried out at Department of Plant pathology, Raichur, Karnataka, India by using poison food technique. Among the commercially available organic products tested, fatty alcohol a...

Gangavati sona (GS) is a high-yielding, fine-grain rice variety widely grown in the Tungabhadra command area in Karnataka, India; however, it is susceptible to bacterial blight (BB). Therefore, the present study was conducted to improve the GS variety for BB resistance. Three BB-resistant genes (xa5, xa13, and Xa21) were introgressed into the genet...

Studies on reproductive biology of yellow stem borer, Scirpophaga incertulas walker in the changing climate scenario conducted at Agriculture Research Station, Gangavathi during 2020-22.Results on post eclosion behavior of yellow stem borer revealed that the maximum female moths emerged between 18:00 and 21:00 hrs from among the emerged moth the fe...

The fall armyworm, Spodoptera frugiperda (JE Smith, 1797) is a notorious invasive pest causing significant economic damage to various crops. The extensive damage caused by this pest has created havoc in India and has become a nightmare for farmers. The management steps taken for controlling the pest have become futile. There are several instances d...

Pink bollwormis the major pest hindering the potential yield of cotton. Even though, transgenic cotton was introduced, the pest developed resistance against the Bt toxins produced by the cotton. The present study aimed at mapping of the resistance across the major cotton growing zones of the country. The F1 obtained from the field collected larvae...

Pink bollworm roving survey on Bt-cotton and some malvaceous plants, in and around the cotton field across the major cotton growing districts of North Eastern region of Karnataka recorded the highest green boll damage in Raichur district (70.79%) followed by Ballari (63.46%) and Yadgir (55.80%) district. Whereas, no incidence of pink bollworm was r...

A new species, Pexicopia tungabhadrai sp. nov. (Lepidoptera: Gelechiidae), feeding on Abutilon indicum is described from Karnataka, India. Also, this is the first report of the genus Pexicopia Common, 1958 from India. Images of adult moths, male and female genitalia and immature stages are provided.

Context Broadening the gene pool of staple food crops by incorporating desirable genes from wild/relative species is way to achieve higher genetic gains. The African rice species Oryza glaberrima Steud. is a source of genes for genetic improvement of Oryza sativa L. to various biotic and abiotic stresses. Aim The study was undertaken to identify g...

One of the challenge in plant breeding is retrieving and identifying most potential transgressive segregants in segregating population. The present study was aimed at understanding the pattern of transgressive segregants (TS) for fibre quality traits in different segregating population's viz., F2, B1F2, B2F2 and F3 derived from an intra-hirsutum cr...

Fall armyworm, Spodoptera frugiperda an alien pest got introduced during 2018 in India and within in couple of months it spread across the country and caused havoc. As usual the farmers started using chemicals. Sporadically some farmers attempted nonchemical approaches viz., application of mud slurry into whorls, dusting of fly-ash, adding detergen...

Present investigation was carried out with 21 pigeonpea genotypes during kharif 2014 to estimate G ×E interaction and stability parameters. Genotype variance was significant for all traits, except number of pods plant-1 and pod length. Non significant G × E interaction obderved for number of pods plant-1 , pod length, number of seeds pod-1 and 100...

The present investigation was carried out with a vision to study the combining ability for important productivity and fibre quality traits of cotton. Fifty five hybrids generated through Griffing's half diallel method were evaluated along with eleven parents and two checks RAHH 455 and SHH 818 in 2017-18 at the Main Agricultural Research Station, R...

The present study was conducted on genetic variability, correlation coefficient analysis for seed cotton yield and its component traits in 18 brown colored cotton genotypes collected from CICR, Nagpur, which was carried out during kharif2018 at the Main Agricultural Research Station, UAS, Raichur, Karnataka. Observations on traits viz., plant heigh...

The present experiment was carried out to study correlation and path analysis studies for yield and yield attributing traits in sixty rice genotypes. The correlation studies revealed that the genotypic correlation were higher than the corresponding phenotypic correlations. Yield exhibited positive association with panicles per plant, biological yie...

The experiment was conducted to evaluate thelocally grownrice genotypesalong withimproved cultivars of rice collected fromvarious parts of Raichur district of Karnatakaand were evaluated for seed and seedlingcharacters.A significant amount of geneticvariation was displayed for most of the traitsexamined. 60 rice genotypes were used in labcondition...

A study was carried out to estimate the GCA of the parents and SCA of the hybrids towards identifying high yielding and better quality cultivars. Eight genotypes and 28 F1 hybrids derived by crossing the eight parental genotypes in half diallel mating system were sown in randomized complete block design. Half diallel analysis revealed significant G...

Plant density and optimum fertilization are two important agronomic practices to enhance productivity of cotton (Gossypium hirsutum L.) varieties. The objective of this study was to investigate the effect of high density planting (HDPS) and fertilization rate, especially their interactions, on yield, yield components of cotton varieties in sub-trop...

Field experiment was conducted at the Main Agricultural Research Station, University of Agricultural Sciences, Raichur during 2012-13 to identify and evaluate the suitable refuge strategy systems for pink bollworm resistance management in Bt cotton (Gossypium hirsutum L.) cultivation. The experiment was laid out in randomized complete block design...

A study was conducted with an objective to determine genotype × environment (G x E) interaction and stability parameters of 20 commercially available Bt cotton hybrids over three environments viz., Agricultural Research Station, Siruguppa (E-l), Main Agricultural Research' Station, Raichur (E-2) and Agricultural Research Station, Bheemarayanagudi (...

A diallel analysis involving six parents was carried out in cotton (Gossypium hirsutum L.) for seed cotton yield, its component charecters and fibre quality traits. both additive and non additive genetic variances were important in controlling the inheritance of all the traits, while non additive genetic variance was predominant for seed cotton yie...

A diallel analysis involving six parents was carried out in cotton (Gossypium hirsutum L.) for seed cotton yield, its component charecters and fibre quality traits. both additive and non additive genetic variances were important in controlling the inheritance of all the traits, while non additive genetic variance was predominant for seed cotton yie...

the nature and magnitude of gene effects for yield , yield attributing triats and fibre quality were estimated in a cross involving two upland cotton genotypes viz., GSHV 99/307 and Surabhi by generation mean analysis. these two parents with contracting gca values for fibre strength and seed cotton yield were selected for initiating the generation...

A field trial was carried out for 3 years during kharif to study the response of Bt cotton to foliar application of potassium nitrate (KNO 3) under irrigated colitions in black soils at Agricultural Research Station, Siruguppa. The experiment was laid out in randomized block design with 3 replications. The experiment consists of 10 treatments. viz....