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首页> 外文期刊>Breeding science >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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Detection and verification of QTLs associated with heat-induced quality decline of rice (Oryza sativa L.) using recombinant inbred lines and near-isogenic lines

机译：使用重组自交系和近代碱基（Oryza Sativa L.）与水稻（Oryza Sativa L.）相关的QTL的检测和验证

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摘要

Decline in the apparent quality of rice (Oryza sativa L.) grain due to high temperatures during ripening recently became a major concern in many areas in Japan. The occurrence of white-back kernels (WBK) is one of the main problems of heat-induced quality decline. We identified QTLs associated with the occurrence of WBK using recombinant inbred lines (RILs) and verified their effects using near-isogenic lines (NILs). The QTL analysis used F7 and F8 RILs derived from 'Hana-echizen' (HE), which is tolerant to high temperature, x 'Niigata-wase' (NW), which is sensitive to high temperature. Four QTLs were identified on chromosomes 3, 4, 6, and 9 (qWB3, qWB4, qWB6 and qWB9). To verify the effects of qWB6 and qWB9, we developed two NILs in which qWB6 or both were introduced from HE into the NW background. The HE allele at qWB6 significantly decreased WBK under multiple environments. The combination of qWB6 and qWB9 in an F2 population derived from a cross between a NIL and NW showed that the NW allele atqWB9 significantly decreased WBK if the qWB6 allele was HE. These results will be of value in marker-assisted selection for the breeding of rice with tolerance to heat-induced quality decline.
机译：在成熟期间，由于高温的米饭（Oryza Sativa L.）谷物的表观质量下降最近成为日本许多地区的主要问题。白背核（WBK）的发生是热诱导质量下降的主要问题之一。我们鉴定了使用重组近交系（RILS）与WBK发生相关的QTL，并使用近代母线（NIL）验证它们的效果。 QTL分析使用的F7和F8 rils来自'Hana-echizen'（HANE-ECIZEN'（HE），其耐高温，x'niigata-wise'（NW），其对高温敏感。在染色体3,4,6和9（QWB3，QWB4，QWB6和QWB9）上鉴定了四个QTL。为了验证QWB6和QWB9的效果，我们开发了两种NIL，其中QWB6或两者从他介绍到NW背景中。在QWB6的他等位基因在多种环境下的WBK显着降低。 QWB6和QWB9的组合在源自NIL和NW之间的交叉中衍生的F2群体表明，如果他是QWB6等位基因，则NW等位基因ATQWB9显着降低了WBK。这些结果将是标记辅助选择的价值，用于耐热诱导质量下降的耐受性。

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