Inheritance of resistance to Acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars
The bean weevil Acanthoscelides obtectus, is an important storage pest of common beans in Latin America and Africa. A few wild bean accessions from Mexico have been identified as highly resistant to the weevil. One accession, G 12952, was crossed to two susceptible bean cultivars differing in seed s...
| Autores principales: | , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
1991
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/42984 |
| _version_ | 1855529537351188480 |
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| author | Kornegay, Julia L. Cardona, C. |
| author_browse | Cardona, C. Kornegay, Julia L. |
| author_facet | Kornegay, Julia L. Cardona, C. |
| author_sort | Kornegay, Julia L. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The bean weevil Acanthoscelides obtectus, is an important storage pest of common beans in Latin America and Africa. A few wild bean accessions from Mexico have been identified as highly resistant to the weevil. One accession, G 12952, was crossed to two susceptible bean cultivars differing in seed size. Reciprocal F1 and F2 individual seed were evaluated for days to adult emergence (DAE) and emerged adult weight. Maternally inherited seed size affected resistance measurements only in the F1 reciprocal crosses, however, the overall resistance level of the F1 was more similar to that of the susceptible cultivars. The F2 showed a continuous, but skewed distribution from low to high DAE. Very few F2 individuals had the resistance level of G 12952. When the frequency distributions were divided into discrete categories based on parental response, resistance was found to be inherited as two recessive complementary genes. The F3 generation showed an overall lowering of resistance levels compared to their original F2 evaluations. However, none of the lines classified as resistant (?50 DAE) in the F2, fell into the susceptible category in the F3, indicating that the resistant genotypes were relatively stable as expected with recessively inherited traits. Modifying genes from the commercial parents may be responsible for general lowering of resistance. Seed size was negatively correlated with adult weight but not with DAE. The unique resistance of the wild bean accessions is discussed in relation to its inheritance. The results and obstacles encountered in the A. obtectus breeding program at CIAT are described. |
| format | Journal Article |
| id | CGSpace42984 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1991 |
| publishDateRange | 1991 |
| publishDateSort | 1991 |
| record_format | dspace |
| spelling | CGSpace429842023-02-15T05:16:59Z Inheritance of resistance to Acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars Kornegay, Julia L. Cardona, C. phaseolus vulgaris acanthoscelides obtectus resistance inheritance crossbreeding wild beans seed size coleoptera injurious insects noxious animals pests plant breeding resistencia herencia cruzamiento frijol silvestre tamano de la semilla The bean weevil Acanthoscelides obtectus, is an important storage pest of common beans in Latin America and Africa. A few wild bean accessions from Mexico have been identified as highly resistant to the weevil. One accession, G 12952, was crossed to two susceptible bean cultivars differing in seed size. Reciprocal F1 and F2 individual seed were evaluated for days to adult emergence (DAE) and emerged adult weight. Maternally inherited seed size affected resistance measurements only in the F1 reciprocal crosses, however, the overall resistance level of the F1 was more similar to that of the susceptible cultivars. The F2 showed a continuous, but skewed distribution from low to high DAE. Very few F2 individuals had the resistance level of G 12952. When the frequency distributions were divided into discrete categories based on parental response, resistance was found to be inherited as two recessive complementary genes. The F3 generation showed an overall lowering of resistance levels compared to their original F2 evaluations. However, none of the lines classified as resistant (?50 DAE) in the F2, fell into the susceptible category in the F3, indicating that the resistant genotypes were relatively stable as expected with recessively inherited traits. Modifying genes from the commercial parents may be responsible for general lowering of resistance. Seed size was negatively correlated with adult weight but not with DAE. The unique resistance of the wild bean accessions is discussed in relation to its inheritance. The results and obstacles encountered in the A. obtectus breeding program at CIAT are described. 1991 2014-09-24T07:58:52Z 2014-09-24T07:58:52Z Journal Article https://hdl.handle.net/10568/42984 en Limited Access |
| spellingShingle | phaseolus vulgaris acanthoscelides obtectus resistance inheritance crossbreeding wild beans seed size coleoptera injurious insects noxious animals pests plant breeding resistencia herencia cruzamiento frijol silvestre tamano de la semilla Kornegay, Julia L. Cardona, C. Inheritance of resistance to Acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars |
| title | Inheritance of resistance to Acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars |
| title_full | Inheritance of resistance to Acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars |
| title_fullStr | Inheritance of resistance to Acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars |
| title_full_unstemmed | Inheritance of resistance to Acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars |
| title_short | Inheritance of resistance to Acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars |
| title_sort | inheritance of resistance to acanthoscelides obtectus in a wild common bean accession crossed to commercial bean cultivars |
| topic | phaseolus vulgaris acanthoscelides obtectus resistance inheritance crossbreeding wild beans seed size coleoptera injurious insects noxious animals pests plant breeding resistencia herencia cruzamiento frijol silvestre tamano de la semilla |
| url | https://hdl.handle.net/10568/42984 |
| work_keys_str_mv | AT kornegayjulial inheritanceofresistancetoacanthoscelidesobtectusinawildcommonbeanaccessioncrossedtocommercialbeancultivars AT cardonac inheritanceofresistancetoacanthoscelidesobtectusinawildcommonbeanaccessioncrossedtocommercialbeancultivars |