Combining ability for opium yield in exotic x indigenous crosses of opium-poppy grown in different environments
1986
Saini, H.C | Kaicker, U.S. | Choundhary, B. (Indian Agricultural Research Inst., New Delhi)
Pooled, F1 and F2 data of crosses raised from 10 exotic x 5 indigenous parents of opium-poppy (Papaver somniferum Linn.) grown in a line x tester design showed considerable variability in the genetic types in both segregating and non-segregating generations for 2 years. Additive genetic variance (gca) was more in the F1 of the first year and in pooled analysis, and non-additive genetic varianca (sca) was preponderant in the F1 of the second year and in F2. The effects of years were pronounced in pooled analysis, and 2gca x year interaction were non-significant - and hence less distorted by environmental fluctuations than 2sca x year. 'EC 11569', 'EC17571' and 'Dhola-Chhota-Gotia' were good combining parents and the highest producers of opium yield in all the 2-year analysis. Cross-combinations 'EC11528' x 'Dhola-Chhota-Gotia', 'EC 11551' x 'Katala Dandi', 'EC 11569' x 'Khali Dandi' showed high estimates of sca, heterosis over the better parent, and high mean performance in all the F1 and F2 analyses. Hence single-plant selection after inter-se matings in further segregating generations would be useful, as non-additive genetic variance was important in these crosses
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