Detection of Quantitative Trait Loci for White-back and Basal-white Kernels under High Temperature Stress in japonica Rice Varieties

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概要

• 論文の詳細を見る

• Several quantitative trait loci (QTLs) associated with the apparent quality of brown rice were identified. QTL analysis was carried out using F_2 and F_3 populations derived from a cross between two japonica varieties, Hana-echizen (high quality of brown rice) and Niigatawase (low quality with numerous white-back and basal-white kernels). F_2 individuals were grown in paddy fields in 2003, and F_3 lines were grown in paddy fields and in a greenhouse to expose them to high temperature stress during the ripening period in 2004. Apparent quality of brown rice was evaluated based on the percentage of white-back and basal-white kernels. Two putative QTLs associated with white-back kernels in the F_2 population grown under low temperature conditions in paddy fields in 2003 were identified on chromosomes 3 and 6. The closest SSR markers were RM4512 and RM3034, respectively. One putative QTL associated with basal-white kernels in the F_2 population was identified on chromosome 6. The closest marker was RM3034. Two putative QTLs associated with white-back kernels in the F_3 population grown under high temperature conditions in paddy fields in 2004 were identified on chromosomes 4 and 6. The closest SSR markers were RM3288 and RM3034, respectively. One putative QTL associated with white-back plus basal-white kernels in the F_3 population grown under high temperature stress in the greenhouse was identified on chromosome 6. The closest marker was RM3034. The QTLs identified near RM3034 on the short arm of chromosome 6 contributed most to the apparent quality of brown rice. The QTLs identified near RM4512 and RM3288 which also affected the apparent quality of brown rice, were detected in either the F_2 or F_3 population. The QTLs identified in the present study should be useful for marker-assisted selection to breed varieties with a high apparent quality of brown rice, especially varieties with tolerance to kernel damage due to high temperature stress during the ripening period.

• 日本育種学会の論文

著者

• Tomita Katsura

  Fukui Agricultural Experiment Station

• Kobayashi Asako

  Fukui Agricultural Experiment Station

• Genliang Bao

  Fukui Agricultural Experiment Station

• Shenghai Ye

  Fukui Agricultural Experiment Station

• Shenghai Ye

  Fukui Agricultural Experiment Station:(present Office)zhejiang Academy Of Agricultural Sciences

• Genliang Bao

  Fukui Agricultural Experiment Station:(present Office)zhejiang Academy Of Agricultural Sciences

関連論文

• 中国雲南省在来イネ品種における遺伝的多様性の再確認
• Verification of quantitative trait locus for stickiness of cooked rice and amylose content by developing near-isogenic lines
• Detection of Quantitative Trait Loci for White-back and Basal-white Kernels under High Temperature Stress in japonica Rice Varieties
• QTL detection for stickiness of cooked rice using recombinant inbred lines derived from crosses between japonica rice cultivars
• Detection and verification of QTLs associated with heat-induced quality decline of rice (Oryza sativa L.) using recombinant inbred lines and near-isogenic lines

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