COMBINING ABILITY AND HETEROSIS STUDIES FOR YIELD AND ITS ATTRIBUTES IN LENTIL (LENS CULINARIS MEDIK. L.)
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Date
2017
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Indira Gandhi Krishi Vishwavidhyalaya, Raipur
Abstract
The present investigation entitled “Combining ability and heterosis studies for yield and its attributes in Lentil (Lens culinaris Medik. L.)” was conducted at AICRP on MULLaRP Research Farm, College of Agriculture IGKV, Raipur (C.G.) during rabi 2016-17. The material for the study comprises of fifteen crosses involving eight divergent parents viz., L 4076, JL 3, IPL 81, RL 7, EC 267554, LL 4710, L 4717, EC 267583, and L 4717 grown in a RBD with three replications.
The eight diverse genotype were crossed in line x tester design following the method given by Kempthorne (1957). Data collected were subjected to analysis for genetic parameters of variability, heritability, genetic advance, heterosis and combining ability for yield and its attributes in lentil.
Analysis of variance revealed significant differences among the lentil genotypes for the character except, days to 50% flowering, days to maturity, plant height (cm), primary branches plant-1, number of secondary branches plant-1, number of pods plant-1, number of pod clusters plant-1, number of seeds plant-1, length of first pod bearing node (cm), 100 seed weight (g), protein content (%), seed yield plant-1(g) and harvest index indicating existence of sufficient genetic variability in the material chosen for present investigation.
High heritability coupled with high genetic advance was recorded for number of pods plant-1, number of seeds plant-1 and number of pod clusters plant-1 suggesting the predominance of additive gene action in the expression of these characters.
The analysis of variance due to general combining ability (gca) revealed highly significant variance for days to 50% flowering, days to maturity, plant height (cm), number of primary branches plant-1, number of secondary branches plant-1, number of pods plant-1 number of pod clusters plant-1, number of seeds plant-1, length of first pod bearing node, 100 seed weight, protein content (%), seed yield plant-1 and harvest index (%).
The variance due to specific combining ability (sca) was highly significant for days to 50 % flowering, days to maturity, plant height (cm), number of secondary branches plant-1, number of pods plant-1, number of pod cluster plant-1, number of seeds plant-1, length of first pod bearing node, 100 seed weight (g), protein content (%), seed yield plant-1 and harvest index (%).
Parents EC 267554, RL 7 and JL 3 were found as good general combiner for seed yield plant-1, Parent L 4717, RL 7 and L 4076 was also found good general combiner for 100 seed weight. Crosses IPL 81×EC 267554, L 4076×EC 267583, L 4076×L 4717, JL 3×RL 7, IPL 81×RL 7 and JL 3×LL 4710 were found as good specific combiners for seed yield plant-1. IPL 81×EC 267554, L 4076×L 4717, JL 3×RL 7, JL 3×LL 4710, L 4076×EC 267583 and JL 3×EC 267583 were found good specific combiners for number of pods plant-1. The desirable specific combiners involving at least one of the parents with high GCA. The cross combinations can be profitably exploited for isolating transgressive segregates for repetitive traits.
Gene action studies revealed the preponderance of non-additive gene action for all characters under study.
Description
COMBINING ABILITY AND HETEROSIS STUDIES FOR YIELD AND ITS ATTRIBUTES IN LENTIL (LENS CULINARIS MEDIK. L.)
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