GENETIC DIVERGENCE AND ITS RELATIONSHIP WITH HETEROSIS IN POTATO*

Luthra, S. K.; Gopal, J.; Sharma, P. C.

GENETIC DIVERGENCE AND ITS RELATIONSHIP WITH HETEROSIS IN POTATO*

2013

Luthra, S. K. | Gopal, J. | Sharma, P. C.

The present study was conducted to assess the genetic divergence (Mahalanobis D2) in 29 potato genotypes(parental lines) based on 20 characters and to find out relationship between genetic diversity and heterosis for tuber yield. Results showed that the parental lines though morphologically diverse had narrow genetic base and could be grouped into four clusters. Observed morphological diversity was not related to geographical as well as taxonomic diversity. Genetic divergence(D values) had a positive relationship with heterosis for tuber yield in the 120 progenies derived from 24 x 5 (line x tester)matings of the parents. Selection of parents based on genetic divergence followed by progeny test is suggested for effective exploitation of heterosis in potato breeding programmes

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