Indian Society of Genetics & Plant Breeding

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STUDIES ON GENETIC DIVERSITY, HETEROSIS AND COMBINING ABILITY IN INDIAN MUSTARD [BRASSICA /UNCEA L. (CZERN & COSS)]

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Genetic diversity, heterosis and combining ability studies were conducted in Indian
mustard. A set of 48 apparen tly diverse lines was picked up from a germplasm of 118 lines
on the basis of multiple regression analysis for seed yield. These 48 lines could be divided
into five distinct groups on the basis of D
2 analysis for seed yield and component traits.
The clustering pattern suggested that geographical diversity was not necessarily an index
of genetic diversity. The study pointed out that relation existed between genetic diversity
of parents and specific combining ability effects as well as heterosis exhibited by the
crosses. Selection of parents based on diversity estimates, coupled with combining ability
analysis, may be useful in the selection of suitable parents for a breeding programme.
  

Keywords: Divergence, combining ability, heterosis, Indian mustard.

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Year: 1991
Volume: 51
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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