Construction of rice chromosome segment substitution lines harboring Oryza barthii genome and evaluation of yield-related traits.
Construction of rice chromosome segment substitution lines harboring Oryza barthii genome and evaluation of yield-related traits.
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DOI：
10.1270/jsbbs.17022
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发表时间：
2017-09
期刊：
影响因子：
2.4
通讯作者：
Takashi T
中科院分区：
文献类型：
--
作者：
Bessho-Uehara K;Furuta T;Masuda K;Yamada S;Angeles-Shim RB;Ashikari M;Takashi T
大米（Oryza sativa L.）是世界上最重要的主食之一。为了满足日益增长的粮食需求，需要采取提高水稻产量的策略。野生近缘种的等位基因非常有用，因为它们使植物能够适应各种恶劣环境，并具有改良水稻的潜力。 O. barthii 是非洲特有的野生稻种，也是非洲栽培稻 O. glaberrima 的已知祖先。为探索白氏粳稻作为遗传资源的遗传潜力，以优良粳稻品种越光为背景，开发并评估了40个白氏粳稻染色体片段置换系（CSSL），以鉴定与旗叶形态、籽粒产量和其他农艺性状相关的10个性状相关的QTL。供体亲本的整个基因组的 90% 以上以 CSSL 中连续或重叠的染色体片段呈现。对几个农业重要性状的 CSSL 进行评估，确定了包含与产量和产量相关性状相关的 QTL 的候选染色体片段。这些结果表明，来自 O. barthii 的等位基因可用作改善 O. sativa 品种产量相关性状的新型遗传资源。
Rice (Oryza sativa L.) is one of the most important staple food in the world. To meet the increasing demand for food, a strategy for improving rice yield is needed. Alleles of wild relatives are useful because they confer adaptation to plants under diverse harsh environments and have the potential to improve rice. O. barthii is a wild rice species endemic to Africa and the known progenitor of the African cultivated rice, O. glaberrima. To explore the genetic potential of the O. barthii as a genetic resource, 40 chromosome segment substitution lines (CSSL) of O. barthii in the background of the elite japonica cultivar Koshihikari were developed and evaluated to identify QTLs associated with 10 traits related to flag leaf morphology, grain yield and other agronomic traits. More than 90% of the entire genome of the donor parent was represented in contiguous or overlapping chromosome segments in the CSSLs. Evaluation of the CSSLs for several agriculturally important traits identified candidate chromosome segments that harbors QTLs associated with yield and yield-related traits. These results suggest that alleles from O. barthii might be used as a novel genetic resource for improving the yield-related traits in cultivars of O. sativa.
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