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STUDY OF COMBINING ABILITY AND COMPONENTS OF VARIATION OF YIELD OF SOME LENTIL LINES
By: Anuradha Roy Chowdhury and Anil Chandra Deb
Key Words: Half diallel cross, combining ability, yield contributing characters, Lentil.
JLES-Vol-11-No-P-33-38-, December 2016
AbstractThis study was conducted with fifteen crosses and six parents of Lens culinaris Medic. to reveal the general combining ability, specific combining ability and components of vatiations and their ratios. The variation due to general combining ability (gca) was found to be significant for days to flower, plant height at first flower, canopy area at maximum flower and root weight indicated that additive gene actions played significant role for the expression of these characters. The highly positive sca estimations were recorded in the cross, P1×P2 for number of secondary branches at first flower, pod weight per plant, seed weight per plant and root weight and the cross P1×P3 for canopy area at maximum flower, number of secondary branches at maximum flower, number of pods per plant and individual plant weight were indicated as good specific combiners. In F1 generation, the component D was significant for days to flower, plant height at first flower, number of primary branches at first flower and canopy area at maximum flower. The values of F were non significant for all the characters except number of primary branches at first flower indicating that equal amount of dominant and recessive genes were present in the parents of F1 generation. Two dominant components of variance, H1 was significant for canopy area at maximum flower and H2 for days to flower, number of primary branches at first flower and canopy area at maximum flower. The ratios of [(H1/D)]1/2 suggested that over dominance was found for number of secondary branches at first flower, number of seeds per plant, seed weight per plant, individual plant weight and root weight. The ratio, (4DH1)1/2+F/(4DH1)1/2-F revealed that the values of the ratio were more than one recorded in canopy area at maximum flower , number of secondary branches at maximum flower, number of pods per plant, number of seeds per plant, seed weight per plant and root weight indicating the presence of an excess of dominant genes in the parents. The ratio, h2/H2 showed that only one group of genes controlled the eleven characters except plant height at first flower and two groups of genes controlled plant height at first flower. The highest value of heritability was obtained for plant height at first flower (0.495144).
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Anuradha Roy Chowdhury and Anil Chandra Deb
STUDY OF COMBINING ABILITY AND COMPONENTS OF VARIATION OF YIELD OF SOME LENTIL LINES
JLES-Vol-11-No-P-33-38-, December 2016
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