Estimation of Heritability and Combining Ability for Fire Blight Resistance in Pear1
Open Access
- 1 March 1977
- journal article
- Published by American Society for Horticultural Science in Journal of the American Society for Horticultural Science
- Vol. 102 (2) , 133-138
- https://doi.org/10.21273/jashs.102.2.133
Abstract
Heritability estimates for fire blight resistance in pear were obtained by regressing progeny means on midparental phenotypes. Approximately half of the variability in resistance in pear was additive (h2 = 0.52), but there was also evidence for nonadditive genetic effects compatible with a proposed qualitative gene for sensitivity. A method was established to estimate relative average combining ability for fire blight resistance. Progeny means of individual parents were adjusted to the grand progeny mean of 8 intercrossed testers based on common progeny.Keywords
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