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- Title
Genetic characterization of anthracnose resistance genes Co-4 <sup>3 </sup>and Co-9 in common bean cultivar tlalnepantla 64 (PI 207262).
- Authors
Alzate-Marin, Ana Lilia; de Souza, Krystyano Almeida; de Morais Silva, Marcelo Geraldo; de Oliveira, Eder Jorge; Moreira, Maurilio Alves; de Barros, Everaldo Gonçalves
- Abstract
Tlalnepantla 64 (PI 207262) is an important source of genes for resistance to common bean anthracnose, caused by Colletotrichum lindemuthianum. However, these genes have not been fully characterized. Inheritance studies using crosses involving PI 207262 show that two independent genes confer resistance to anthracnose. Allelism tests showed that the genes are located at distinct loci from the previously identified resistance genes Co-1, Co-2, Co-3, Co-5, Co-6, and Co-10. Also, no segregation was observed in relation to Co-4, Co-4 2, Co-9, and to the gene present in cultivar Widusa, indicating that PI 207262 harbors alleles of these genes. We conclude that PI 207262 harbors two anthracnose resistance genes, Co-4 and Co-9. The Co-4 allele of PI 207262 would be different from Co-4 and Co-4 2 and it is proposed Co-4 3 as the genetic symbol for this resistance allele. As PI 207262 is the parent of BAT 93, the Co-9 symbol represents the gene of both cultivars. Also, one allele of Co-9 gene was detected in cultivar Widusa.
- Subjects
COMMON bean; PLANT genetics; ANTHRACNOSE; PLANT diseases; ALLELES
- Publication
Euphytica, 2007, Vol 154, Issue 1/2, p1
- ISSN
0014-2336
- Publication type
Article
- DOI
10.1007/s10681-006-9253-x