| Autor: |
Calvo, Éberson S., Kiihl, Romeu A.S., Garcia, Alexandre, Harada, Arlindo, Hiromoto, Dario M. |
| Zdroj: |
Crop Science; July 2008, Vol. 48 Issue: 4 p1350-1354, 5p |
| Abstrakt: |
Soybean rust (SBR) caused by Phakopsora pachyrhiziSyd. is currently the most threatening fungal disease of soybean [Glycine max(L.) Merr.] in the Americas. Development of resistant or tolerant cultivars is a major goal in several soybean breeding programs. Four loci, all carrying dominant alleles that confer a resistant phenotype, have been described. We investigated the genetic basis of the resistance in PI 200456 and PI 224270 by crossing each of them with a susceptible cultivar (CD 208). Phenotypic segregation ratios for F2plants and F2:3lines showed that the resistance in each resistant parent was controlled by a single recessive gene. A test for allelism demonstrated that these genes are non‐allelic. This is the first report of recessive genes controlling SBR resistance in soybean and may represent a different type of resistance for breeding programs aimed at development of more durable resistance. |
| Databáze: |
Supplemental Index |
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