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Angadi, Chandrashekhar
- Estimation of Gene Actions and Character Association in F3 and F4 Generations of Little Millet Cross JK 8 X Peddasame Purple Early (Panicum miliare)
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Authors
Affiliations
1 Project Coordinating Unit, Small Millets (U.A.S.) G.K.V.K., Bengaluru (Karnataka), IN
1 Project Coordinating Unit, Small Millets (U.A.S.) G.K.V.K., Bengaluru (Karnataka), IN
Source
International Journal of Agricultural Sciences, Vol 13, No 1 (2017), Pagination: 119-123Abstract
An investigation was carried out in F3 and F4 segregating generations of little millet to study gene interactions and correlation for yield and its component traits during Kharif 2015 and summer 2016 at UAS, GKVK, Bengaluru. Most of the characters studied were positively skewed and were being governed by several genes indicating quantitative inheritance. Characters seed yield per plant, number of productive tillers per plant and days to maturity were positively skewed indicating complementary gene action hence, to maximize the genetic gain in these characters require intense selection from the existing variability. Panicle length showed negatively skewed distribution indicating duplicate gene action hence, genetic gain will be rapid under mild selection. Seed yield and associated characters showed leptokurtic distribution indicated the involvement of few genes in inheritance of these traits. Seed yield per plant had significant positive association with days to 50 per cent flowering, plant height, number of productive tillers per plant, panicle length and days to maturity. This indicates that selection could be practiced for these component characters to increase seed yield. Variance for majority of the characters has decreased in F4 over F3 generation indicated over the generation variability in population has decreased due to increase in homozygosity.Keywords
Correlation, Skewness, Kurtosis, Gene Interaction, Little Millet.
References
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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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