Increased lodging resistance in long-culm, low-lignin gh2 rice for improved feed and bioenergy production.
Increased lodging resistance in long-culm, low-lignin gh2 rice for improved feed and bioenergy production.
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DOI：
10.1038/srep06567
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发表时间：
2014-10-09
影响因子：
4.6
通讯作者：
Hirasawa T
中科院分区：
文献类型：
--
作者：
Ookawa T;Inoue K;Matsuoka M;Ebitani T;Takarada T;Yamamoto T;Ueda T;Yokoyama T;Sugiyama C;Nakaba S;Funada R;Kato H;Kanekatsu M;Toyota K;Motobayashi T;Vazirzanjani M;Tojo S;Hirasawa T
木质素改性一直是改善饲料和生物能源作物中饲料消化率和能量产量的育种目标，但木质素水平的降低往往伴随着抗倒伏性的降低。水稻突变体gold船体和internode2（gh2）被鉴定为木质素缺陷型。GH2定位于2号染色体短臂，编码肉桂醇脱氢酶（CAD）。我们培育了一个长秆品种'叶星'，它具有上级抗倒伏性，与它的亲本之一'中国117'具有相似的gh表型。叶星星和中国117的gh位点定位于与gh2突变体相同的2号染色体区域。叶星星具有低木质素浓度的秆，这是由于OsCAD 2中的天然突变，该突变在中国117中不存在。然而，这个品种有高秆力量由于它的强壮，厚秆。此外，该品种有一层厚的皮层纤维组织和发达的次生细胞壁。我们的研究结果表明，水稻可以通过结合上级抗倒伏性和低木质素浓度来提高饲料和生物能源生产，抗倒伏性可以通过引入粗硬的秆性状来获得，低木质素浓度可以通过gh2品种来获得。
Lignin modification has been a breeding target for the improvements of forage digestibility and energy yields in forage and bioenergy crops, but decreased lignin levels are often accompanied by reduced lodging resistance. The rice mutant gold hull and internode2 (gh2) has been identified to be lignin deficient. GH2 has been mapped to the short arm of chromosome 2 and encodes cinnamyl-alcohol dehydrogenase (CAD). We developed a long-culm variety, ‘Leaf Star’, with superior lodging resistance and a gh phenotype similar to one of its parents, ‘Chugoku 117’. The gh loci in Leaf Star and Chugoku 117 were localized to the same region of chromosome 2 as the gh2 mutant. Leaf Star had culms with low lignin concentrations due to a natural mutation in OsCAD2 that was not present in Chugoku 117. However, this variety had high culm strength due to its strong, thick culms. Additionally, this variety had a thick layer of cortical fiber tissue with well-developed secondary cell walls. Our results suggest that rice can be improved for forage and bioenergy production by combining superior lodging resistance, which can be obtained by introducing thick and stiff culm traits, with low lignin concentrations, which can be obtained using the gh2 variety.
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影响因子：
1.6
作者：
Suzuki, Shiro;Suzuki, Yoshie;Umezawa, Toshiaki
通讯作者：
Umezawa, Toshiaki
参与小麦木质素生物合成的肉桂醇脱氢酶的功能分析
影响因子：
6.9
作者：
Ma QH
通讯作者：
Ma QH
影响因子：
46.9
作者：
Chen, Fang;Dixon, Richard A.
通讯作者：
Dixon, Richard A.
影响因子：
6.9
作者：
Ma QH
通讯作者：
Ma QH
影响因子：
7.4
作者：
Tanaka, K;Murata, K;Hirochika, H
通讯作者：
Hirochika, H