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Detection of a novel quantitative trait locus for cold tolerance at the booting stage derived from a tropical japonica rice variety Silewah OAK
Mori, Masahiko; Onishi, Kazumitsu; Tokizono, Yoshiro; Shinada, Hiroshi; Yoshimura, Toru; Numao, Yoshinori; Miura, Hideho; Sato, Takashi; 大西, 一光; 三浦, 秀穂.
Cold stress at the booting stage in rice induces spikelet sterility because of aberrant microspore development, which often seriously damages seed production. Some breeding lines with high cold tolerance were developed by using tropical japonica variety Silewah as a donor of cold tolerance; however, the genetic factors that confer cold tolerance of this variety have not been comprehensively analyzed. In this study, phenotypic and molecular characterization of novel cold-tolerant strains derived from crosses with Silewah was performed to identify quantitative trait loci (QTLs) responsible for cold tolerance. Molecular marker analysis revealed that 2 cold-tolerant strains carried chromosomal segments of Silewah at the same genomic regions on chromosomes 3, 4...
Palavras-chave: Oryza sativa; Cold tolerance; Booting stage; QTL; Phenotypic selection; Marker-assisted selection; Exotic germplasm.
Ano: 2011 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3040
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