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Studies on heterosis and inbreeding depression for yield and its attributes in greengram [Vigna radiata (L.) Wilczek]

DOI: 10.18805/lr.v0iOF.6779    | Article Id: LR-3463 | Page : 896-899
Citation :- Studies on heterosis and inbreeding depression for yield and its attributes in greengram [Vigna radiata (L.) Wilczek] .Legume Research.2016.(39):896-899

R. Narasimhulu*, N.V. Naidu1 and K.H.P. Reddy

narsi46@gmail.com
Address :

Department of Genetics and Plant Breeding, S.V. Agricultural College, Tirupati 517 502, India

Submitted Date : 30-01-2015
Accepted Date : 30-04-2015

Abstract

Five crosses were evaluated to study the extent of heterosis and inbreeding depression for yield and its attributing traits in greengram. Heterosis over mid parent, better parent and standard variety was significant for pods/plant and seed yield/plant. The crosses exhibiting high heterosis also expressed high inbreeding depression for pods/plant, pods/cluster and seed yield/plant. Heterosis coupled with inbreeding depression revealed the predominance of non-additive gene action for most of the characters studied. Owing to its autogamous genetic architecture and biological constrains of the crop the heterosis could be exploited only by isolating the desirable segregants for yield attributes adopting bi-parental or recurrent selection in early segregating generations followed by single plant selection in subsequent generations.

Keywords

Gene action Hybrid vigour Inbreeding depression Tolerance to MYMV.

References

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