Indian Society of Genetics & Plant Breeding

Important

COMBINING ABILITY AND GENETIC DIVERSITY IN SOME VARIETIES OF LINUM USITATISSIMUM

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THE concept of choosing parents on the basis of their general combining ability
for components of yield and genetic divergence from each other in self-as well
as cross-pollinated crops has helped in a substantial genetic advance in crops like
maize,
Nicotiana and alfalfa (Griffing, 1956; Matzinger, Mann and Cockerham,
1962; Carnahan and Carlson, 1963). In spite of the diverse parents used in
the linseed breeding work in India, the improvement in yield was considerably
limited, indicating the operation of gene interactions and correlated responses
(Joshi, Ramanujam and Pillay, 1961; Jeswani, Murty, Deshpande and Guglani,
1962). Therefore, a set of ten parents representing exotic and Indian varieties
as well as derived lines involving Indian and exotic parents used in the breeding
programme in India were examined for a better understanding of the nature of
the gene action for yield components in a set of diallel crosses among them.
The optimum fraction of the total possible crosses which could estimate combining
ability effects with a specified degree of precision, if large number of parents are
involved, was also investigated; this will be published separately. 

Info

Year: 1966
Volume: 26
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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