Finding the superior allele of japonica-type for increasing stem lodging resistance in indica rice varieties using chromosome segment substitution lines.
Finding the superior allele of japonica-type for increasing stem lodging resistance in indica rice varieties using chromosome segment substitution lines.
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DOI：
10.1186/s12284-018-0216-3
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发表时间：
2018-04-18
期刊：
影响因子：
--
通讯作者：
Ookawa T
中科院分区：
文献类型：
--
作者：
Mulsanti IW;Yamamoto T;Ueda T;Samadi AF;Kamahora E;Rumanti IA;Thanh VC;Adachi S;Suzuki S;Kanekatsu M;Hirasawa T;Ookawa T
禾谷类作物茎秆倒伏可分为折茎型和弯茎型。要提高抗倒伏性，必须充分利用上级抗倒伏品种的强秆性状。确定与抗弯刚度（FR）和抗弯弯矩（M）相关的数量性状位点（QTL）及其基因，将有助于抗倒伏品种的高效选育。本研究利用高成和越光杂交获得的一组染色体片段代换系（CSSLs）对小麦抗倒伏性状进行了QTL定位。籼稻品种高成尽管弯曲应力（BS）小，但由于其大的截面模量（SM）而具有大的M，而高成由于其大的二次惯性矩（SMI）和杨氏模量（YM）也具有大的FR。BS的QTL定位于第3、5、6、8、9、10、11和12号染色体。在这些QTL中，越光等位基因增加了BS。YM增加的越光染色体片段上的染色体2，10和11的取代。其他QTL定位在第7和12染色体上，因此越光等位基因有助于YM的降低。纤维素密度的QTL被分配到染色体1，3和5，这是由越光片段的取代取代。在第5染色体上鉴定的半纤维素、纤维素和综纤维素密度的QTL与BS的QTL重叠，表明越光片段对增加BS具有积极作用。这些结果表明，粳稻品种细胞壁物质密度的QTL对提高抗倒性有贡献，可用于提高籼稻品种的抗倒性。本文的在线版本（10.1186/s12284-018-0216-3）包含补充材料，可供授权用户使用。
In cereal crops, stem lodging can be classified into two types: stem-breaking type and stem-bending type. To improve stem-lodging resistance, the strong culm traits of superior lodging-resistant varieties must be characterized. The identification of quantitative trait loci (QTLs) and the corresponding genes associated with the parameters for bending moment at breaking (M) and flexural rigidity (FR) is expected to enable the efficient development of lodging-resistant varieties. A set of Chromosome Segment Substitution Lines (CSSLs) derived from the cross between Takanari and Koshihikari were used in this study to identify QTLs associated with lodging resistance. The indica variety Takanari possesses large M due to its large section modulus (SM) despite its small bending stress (BS), whereas Takanari also has large FR due to its large secondary moment of inertia (SMI) and Young’s modulus (YM). The QTLs for BS were assigned to chromosomes 3, 5, 6, 8, 9, 10, 11, and 12. Koshihikari alleles increased BS in these QTLs. The YM was increased by substitution of the Koshihikari chromosomal segments on chromosomes 2, 10, and 11. Other QTLs mapped to chromosomes 7 and 12, such that the Koshihikari alleles contributed to the decrease of YM. QTLs for cellulose density were assigned to chromosomes 1, 3, and 5, which were replaced by substitutions of Koshihikari segments. The QTLs for hemicellulose, cellulose, and holocellulose densities identified on chromosome 5 overlapped with those for BS, indicating the positive effect of the Koshihikari segment on increasing BS. These results suggested that the QTLs for the densities of cell wall materials in japonica varieties contributed to increased BS and might be utilized for improving lodging resistance in indica varieties of rice. The online version of this article (10.1186/s12284-018-0216-3) contains supplementary material, which is available to authorized users.
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影响因子：
3.7
作者：
Matsubara K;Yamamoto E;Kobayashi N;Ishii T;Tanaka J;Tsunematsu H;Yoshinaga S;Matsumura O;Yonemaru J;Mizobuchi R;Yamamoto T;Kato H;Yano M
通讯作者：
Yano M
影响因子：
5.4
作者：
Ando, Tsuyu;Yamamoto, Toshio;Yano, Masahiro
通讯作者：
Yano, Masahiro
影响因子：
2.5
作者：
Matsushita, Kei;Ishii, Takuro;Watanabe, Hajime
通讯作者：
Watanabe, Hajime
影响因子：
4.3
作者：
Ishimaru, Ken;Togawa, Eiji;Hirotsu, Naoki
通讯作者：
Hirotsu, Naoki
影响因子：
7.4
作者：
Kashiwagi, T;Ishimaru, K
通讯作者：
Ishimaru, K