数字农科院2.0

Molecular genetic analysis on percentage of grains with chalkiness in rice (Oryza sativa L.)

文献类型: 外文期刊

作者: Chen Hai-mei;Zhao Zhi-gang;Jiang Ling;Wan Xiang-yuan;Liu Ling-long;Wu Xiu-ju;Wan Jian-min;Wan Jian-min

作者机构:

关键词: Chromosome segmental substitution line (CSSL);recombinant inbred line (RIL);percentage of grains with chalkiness (PGWC);rice

期刊名称: AFRICAN JOURNAL OF BIOTECHNOLOGY

ISSN: 1684-5315

年卷期: 2011 年 10 卷 36 期

页码:

收录情况: SCI

摘要: Percentage of grains with chalkiness (PGWC) is an important factor in determining the appearance quality of milled rice. A total of 10 main-effect quantitative trait loci QTLs were identified in four environments using 71 recombinant inbred lines (RILs) derived from a cross between Asominori (Japonica) and IR24 (Indica). These QTLs were further investigated using target chromosome segmental substitution lines (CSSLs) harboring them. The PGWC of the target CSSLs, harboring qPGWC-9, qPGWC-3 and qPGWC-5 alleles, was significantly different from Asominori (P < 0.05), indicating these three QTLs with relatively high stability. Importantly, PGWC of CSSL64 was significantly higher than that of Asominori in all the eight environments. We constructed an F(2) secondary population derived from Asominori x CSSL64 to explore the genetics of CSSL64 with high PGWC and qPGWC-9 was identified repeatedly in the three consecutive years (2005 to 2007). Further restriction in the interval of RM23958-RM1328 on chromosome 9, explained 19.3% of the phenotypic variance by its F(3) population. These results will be useful in fine-mapping and cloning of the qPGWC-9 allele and marker-assisted selection in rice high quality breeding programs.

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