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Mohan Rao, A.
- Influence of Maleterility Inducing Cytoplasm on Hybrid Heterosis for Bioenergy Traits in Sweet Sorghum [Sorghum bicolor (L.) Moench]
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Authors
H. B. Dinesh
1,
M. R. Gururaja Rao
1,
S. Ramesh
1,
A. Mohan Rao
1,
S. J. Satheesh Naik
1,
Sidramappa Talekar
1
Affiliations
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences, G.K.V.K., Bengaluru, Karnataka, IN
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences, G.K.V.K., Bengaluru, Karnataka, IN
Source
International Journal of Plant Sciences, Vol 8, No 1 (2013), Pagination: 169-172Abstract
Influence of male sterility inducing cytoplasm on heterosis with respect to ethanol yield and its attributing traits in sweet sorghum was studied in 48 hybrids developed by crossing six A- lines viz., ICSA 631, ICSA 731, ICSA 324, ICSA 500, ICSA 38 and ICSA 84 and their corresponding B- lines with four R- lines viz., SEREDO, ICSV 700, ICSV 111 and E 36-1 in a line × tester mating design. The 16 parents and their 48 hybrids were grown separately in contiguous blocks in single row of 3m length with 0.15 m × 0.60 m spacing in simple lattice design with two replications at the experimental plots of Gandhi Krishi Vignana Kendra (GKVK), University of Agricultural Sciences (UAS), Bangalore. Presence of an average level of heterosis for all the traits studied were evident as exemplified by significant mean squares due to parents vs. hybrids. While cytoplasmic influence was apparent for midparent heterosis under individual nuclear genetic background for all the traits, no definite trend favoring any particular cytoplasm was observed.Keywords
Cytoplasmic Influence, Heterosis, Male Sterility Inducing Cytoplasm, Sweet Sorghum
- AFLP Analysis of Genetic Relationships and Diversity of Some Oriental Pickling Melon (Cucumis melo Var. conomon) Genotypes in Karnataka
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Authors
Affiliations
1 Department of Horticulture, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN
2 Directorate of Education, University of Horticultural Sciences, Udyanagiri, Bagalkot (Karnataka), IN
3 Department of Genetics and Plant Breeding, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN
1 Department of Horticulture, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN
2 Directorate of Education, University of Horticultural Sciences, Udyanagiri, Bagalkot (Karnataka), IN
3 Department of Genetics and Plant Breeding, University of Agricultural Sciences, G.K.V.K., Bengaluru (Karnataka), IN
Source
International Journal of Agricultural Sciences, Vol 13, No 2 (2017), Pagination: 242-248Abstract
Genetic diversity of indigenous plant population is the prerequisite for any research on plant breeding and improvement, making genetic diversity conservation of critical importance. The present study was conducted to assess the amplified fragment length polymorphism (AFLP) marker based diversity in 15 oriental pickling melon (Cucumis melo var. conomon) genotypes during 2009 at University of Agricultural Sciences (UAS), Bangalore. Thirteen primer combinations generated a total of 443 amplicons, of which 342 were polymorphic (76%) with an average of 26.31 bands. The primer combination E-CTT/M-GTG was found to amplify 45 scorable bands, with 91.11 per cent polymorphic bands. Cluster analysis based on Jaccard similarity index and UPGMA algorithm showed a high variation within the studied genotypes and a mean similarity index of 0.79 for AFLP markers. The genotypes CMC GKVK 1 and CMC GKVK 6 expressed the least similarity (0.627) and may serves as very good source in melon breeding programme. Genotypes CMC GKVK1, CMC GKVK8, CMC GKVK15, CMC GKVK11 and CMC GKVK6 fell into solitary clusters and these accessions could be used in future genetic, physiological and morphological studies.Keywords
Oriental Pickling Melon, AFLP, Genetic Diversity.References
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- Padmavathi, N., Tomason, Y. R., Jeong, J., Gopinath, V., Levi, A., Gibson, P. and Reddy, U.K. (2008). Molecular diversity in the Ukrainian melon collection as revealed by AFLPs and microsatellites. Plant Genetic Resources: Characterizat. & Utilizat., 7(2): 127-134.
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- Identification of High Yielding and Blast Disease Resistant F6 RILs in Finger Millet
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Authors
Affiliations
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences (G.K.V.K.), Bengaluru (Karnataka), IN
2 AICRP, University of Agricultural Sciences (G.K.V.K.), Bengaluru (Karnataka), IN
3 Zonal Agricultural Research Station, VC Farm, Mandya (Karnataka), IN
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences (G.K.V.K.), Bengaluru (Karnataka), IN
2 AICRP, University of Agricultural Sciences (G.K.V.K.), Bengaluru (Karnataka), IN
3 Zonal Agricultural Research Station, VC Farm, Mandya (Karnataka), IN
Source
International Journal of Agricultural Sciences, Vol 13, No 2 (2017), Pagination: 338-347Abstract
Finger millet [Eleusine coracana (L.) Gaertn.] is one of the most important staple food crops in India. Blast disease caused by the fungus Pyricularia grisea (Cooke) is the most devastating biotic production constraint which affects different aerial parts of the plant at all plant growth stages. Development of pure-line varieties with high grain yield potential coupled with blast disease resistance is the major breeding objective of breeding finger millet. 360 F6 Recombinant Inbred Lines (RILs) derived from the cross PR 202×GPU 48 were evaluated at two locations during 2015 rainy season (Bengaluru and Mandya) for grain yield and response to blast disease reaction. Analysis of variance in F6 RILs at both Bengaluru and Mandya locations revealed highly significant mean squares attributable to ‘RILs’ and ‘check varieties’ for all traits studied. High GCV and PCV were observed for grain yield plant-1, neck blast incidence and finger blast incidence at Bengaluru and Mandya locations. All the traits studied exhibited higher broad sense heritability for both locations. The best ten high yielding RILs were identified.Keywords
Recombinant Inbred Lines, Grain Yield, Blast, Variability.References
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- Photo-thermal Effects on Time to Flowering in Dolichos Bean (Lablab purpureus (L). Sweet) Var. Lignosus
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Authors
Affiliations
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences, GKVK, Bengaluru 560 065, IN
2 All India Coordinated Research Project on Pigeonpea, Zonal Agricultural Research Station, UAS, Bengaluru 560 065, IN
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences, GKVK, Bengaluru 560 065, IN
2 All India Coordinated Research Project on Pigeonpea, Zonal Agricultural Research Station, UAS, Bengaluru 560 065, IN
Source
Current Science, Vol 115, No 7 (2018), Pagination: 1320-1327Abstract
Prediction of time to flowering of crop plants (especially photoperiod sensitive (PS) ones) help make appropriate crop management decisions such as choosing optimum sowing and harvesting dates which in turn determine plant size and thus affect dry matter production and crop yield. Modelling time to flowering of dolichos bean, a highly PS short-day food legume crop species, indicated greater role of temperature than photoperiod in regulating time to flowering of PS genotypes. The PS and photoperiod insensitive (PIS) genotypes of dolichos bean differed for base (Tb) and optimum temperature requirement for time to flowering. However, they were comparable for critical minimum, maximum and optimum photoperiod requirement for time to flowering. Dolichos bean requires critical minimum, maximum and optimum photoperiods of 11.11, 12.28 and 12.21 h respectively, and critical minimum growing degree days of 372.05°C day-1 and optimum temperature of 23.13°C for time to flowering. Using average daily air temperature, and working backwards in time, it is possible to predict the combination of dolichos bean cultivar and sowing date that will produce ready for harvest crop on a predetermined day when fresh pod quality is optimal.Keywords
Base Temperature, Critical Photoperiod, Dolichos Bean, Regression Models.Full Text
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- Inheritance of Fruitinghabit Traits in Chilli (Capsicum annuum L.)
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Authors
Affiliations
1 Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Gandhi Krishi Vignana Kendra, Bengaluru 560 065, IN
1 Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Gandhi Krishi Vignana Kendra, Bengaluru 560 065, IN
Source
Current Science, Vol 118, No 10 (2020), Pagination: 1598-1602Abstract
Fruiting habit, viz. fruits node–1 and fruit orientation are economically important traits in chilli. Fruiting habit could be solitary erect, solitary pendant, clus-tered erect or clustered pendant. Farmers’ preference for fruiting habit traits varies from region to region. An understanding of the inheritance of fruiting habit traits helps accelerate breeding chilli cultivars with farmer-preferred combination of such traits. Eight diverse genotypes contrasting for fruiting habit traits were crossed to develop ten F1 hybrids of six combina-tions. The F2 and backcross generations of all the six distinct types of crosses were evaluated and pattern of segregation for fruiting habit traits was recorded. Results indicated bi-allelic, monogenic inheritance of fruits node–1 (solitary versus clustered) and fruit orientation (pendant versus erect) with solitary being dominant over clustered and pendant being dominant over erect orientation respectively. Genes controlling fruits node–1 and orientation of fruits segregated inde-pendently. Implications of these results are discussed in relation to strategic and applied chilli breeding.Keywords
Chilli, Fruiting Habit Traits, Goodness-of-Fit, Inheritance.Full Text
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