Premium
Dynamic analyses of rice blast resistance for the assessment of genetic and environmental effects
Author(s) -
Li Y. B.,
Wu C. J.,
Jiang G. H.,
Wang L. Q.,
He Y. Q.
Publication year - 2007
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.2007.01409.x
Subject(s) - quantitative trait locus , biology , epistasis , doubled haploidy , population , genetics , chromosome , resistance (ecology) , gene , agronomy , demography , sociology
A doubled haploid population was employed to characterize the dynamic changes of the genetic components involved in rice blast resistance, including main‐effect quantitative trait loci (QTLs), epistatic QTLs and QTL‐by‐environment interactions. The study was carried out at three different developmental stages of rice, using natural infection tests over 2 years. The number of main‐effect QTLs, epistatic QTLs and their environmental interactions differed across the various measuring stages. One QTL ( d12 ) on chromosome 12 was detected at all stages, whereas most QTLs were active only at one or two stages in the population. These findings suggest that the unstable expression of most QTLs identified for blast resistance was influenced by the developmental status of the plants, epistatic effects between different loci and the environments in which they were grown. These findings demonstrate the complexity of expression of rice blast resistance and have important implications for durable resistance‐breeding and map‐based cloning of quantitative traits.