COMBINING ABILITY IN F2 HYBRIDS PEAS (Pisum sativum L.)
Mesopotamia Journal of Agriculture,
2018, Volume 46, Issue 4, Pages 155-170
AbstractUsed in this study Four varieties of Peas (Pisum sativum L.) viz, (1- Carina, 2- English, 3- Green Feast and 4- Little Marvel ) were Full diallel crossing carried out according to (Griffing 1956) first method (Model I) to produce F2 hybrids, of twelve single hybrid from self pollination of F1 hybrid during the growing season 2010/2011. The parents and F2 hybrid were planting by using Randomized Complete Block Design (R.C.B.D.) with three replications at vegetable field of the Horticulture and landscape design department, College of Agriculture and Forestry , Mosul University, during the growing season 2011/2012, for evaluate the performance of full diallel hybrids and parents, to determine the best parental combinations through general and specific combining abilities analysis and estimating their effects and reciprocal effect of the yield and its components.
Analysis of variance results showed that mean squares of general combining ability was significant for all the studied characters except no. of branches(branch. plant-1) and pod filling, and that of specific combining ability was significant for most studied characters, the reciprocal effects was significant for all studied characters. The results showed that variance compound of general combining ability was higher than that of specific combining ability for plant height, date flowering and maturity, average weight and pod length, no. of seeds per pod, green pods yield and biological yield, indicating that an additive gene action control the inheritance of these characters. Estimation of general combining ability effects showed that the parent Little Marvel was significant and good combiners for most of the studied characters, indicating that the contains desired gene , the hybrids varied for their specific combining ability effects, the hybrid 2×4 have a good significant specific combining ability effects for the most desirable characters, and this due to the wide genetic diversity between their parents and their abilities to inherit their characters to their hybrids.
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