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Inheritance of partial resistance to bean rust in the common bean (Phaseolus vulgaris L.) |
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| Authors: | B R EDINGTON P E SHANAHAN J LEVIN F H J RIJKENBERG |
| Affiliation: | Departments of Genetics, University of Natal, P O Box 375, Pietermaritzburg, South Africa;Departments of Statistics &Biometry, University of Natal, P O Box 375, Pietermaritzburg, South Africa;Departments of Microbiology &Plant Pathology, University of Natal, P O Box 375, Pietermaritzburg, South Africa |
| Abstract: | The inheritance of partial resistance within eight bean cultivars to a single-pustule isolate of bean rust was studied by means of a F1 diallel test. General combining ability (GCA) and specific combining ability (SCA) were very highly significant over two seasons and in interaction with seasons. The partitioning of the sums of squares indicated the greater importance of GCA in the inheritance of the resistance. Reciprocal effects were not significant. The estimates of narrow-sense heritability in the two seasons were 0.899 ± 0.056 and 0.603 ± 0.065. |
| Keywords: | Bean bean rust partial resistance general combining ability specific combining ability narrow-sense heritability |