https://scholars.tari.gov.tw/handle/123456789/4024
Title: | Genetic analysis and molecular mapping of QTLs associated with resistance to bacterial blight in a rice mutant, SA0423 | Authors: | Hsin-Yi Tseng Da-Gin Lin Hsiao-Ying Hsieh Ya-June Tseng Wen-Bin Tseng Chun-Wei Chen Chang-Sheng Wang |
Keywords: | Rice;Bacterial blight disease;Resistance;Mutant;QTL mapping;R/qtl | Issue Date: | Sep-2015 | Publisher: | Springer | Journal Volume: | 205 | Journal Issue: | 1 | Start page/Pages: | 231-241 | Source: | Euphytica | Abstract: | Bacterial blight disease, caused by Xanthomonas oryzae pv. oryzae (Xoo), is one of the most serious diseases in rice producing areas. SA0423 is a broad-range resistance mutant selected from a popular japonica-type variety, TNG67, using sodium azide mutagenesis. Genetic analysis and QTL mapping of SA0423 were performed using the descendants obtained from crossing with Taichung Native 1, a susceptible and well-known indica variety, by challenging with a Taiwanese Xoo isolate, XF89b. Genetic analysis displayed that the resistance of SA0423 is regulated by quantitative trait loci (QTLs) with incomplete dominance. A linkage map covering 12 chromosomes and consisting of 148 SSR as well as 3 InDel markers was constructed. Three QTLs are identified on chromosomes 11, 8 and 6 and account for 21.1, 11 and 9.6 % of the observed phenotypic variance, respectively. Three QTLs are localized to 6, 7 and 14 confidence intervals, respectively. These QTLs contribute to approximately 47 % of the total phenotypic variation of the F-2 population. No epistatic effect could be detected among the three QTLs. Our results provide a suitable source of potential disease resistance genes and establish a system for improving rice bacterial blight resistance through marker-assisted selection. |
URI: | https://scholars.tari.gov.tw/handle/123456789/4024 https://link.springer.com/article/10.1007%2Fs10681-015-1435-y |
ISSN: | 0014-2336 | DOI: | 10.1007/s10681-015-1435-y |
Appears in Collections: | SCI期刊 |
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