Indian Society of Genetics & Plant Breeding

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Genetical analysis for quantitative and qualitative traits in tomato (Lycopersicon esculentum) under open and protected environment

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Twelve divergent lines of tomato and their 66F1 hybrids
were studied to investigate the extent of heterosis and
general and specific combining ability effects for five
quantitative and three qualitative traits under open and
polyhouse environments in mid hill conditions of Central
Himalayas. The additive as well as non-additive gene
effects played significant role in the inheritance of the
yield and other traits. Higher proportion of gea x
environment interaction variance as compared to sea x
environment estimates were recorded. Additive genetic
variances were more sensitive than non-genetic variances
to changing environment. Parent Azad T-2 and DARL-64
were adjudged best general combiner for yield per plant,
while parent EC 386037 and Sel-7 were the good general
combiner for all the quality traits studied. Significant
heterosis was found for yield per plant under open and
polyhouse environment respectively over mid and top
parent and commercial control revealed that there was a
great scope of realizing higher yield in tomato through
heterosis breeding. The cross combinations EC 386032
x BL-342, Mechin x EC 386023 and Azad T-2 x Hawaii-7998,
Azad T-2 x DARL-64, were identified as the best heterotic
combinations under open and protected environments
respectively.
 

Keywords: Tomato, additive and non-additive gene action, open and protected environment, heterosis

Info

Year: 2004
Volume: 64
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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