A natural variant of NAL1, selected in high-yield rice breeding programs, pleiotropically increases photosynthesis rate.
A natural variant of NAL1, selected in high-yield rice breeding programs, pleiotropically increases photosynthesis rate.
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在高收益水稻育种计划中选择的NAL1的自然变体可以提高光合作用率。
DOI：
10.1038/srep02149
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发表时间：
2013
影响因子：
4.6
通讯作者：
Yamamoto, Toshio
中科院分区：
文献类型：
--
作者：
Takai, Toshiyuki;Adachi, Shunsuke;Taguchi-Shiobara, Fumio;Sanoh-Arai, Yumiko;Iwasawa, Norio;Yoshinaga, Satoshi;Hirose, Sakiko;Taniguchi, Yojiro;Yamanouchi, Utako;Wu, Jianzhong;Matsumoto, Takashi;Sugimoto, Kazuhiko;Kondo, Katsuhiko;Ikka, Takashi;Ando, Tsuyu;Kono, Izumi;Ito, Sachie;Shomura, Ayahiko;Ookawa, Taiichiro;Hirasawa, Tadashi;Yano, Masahiro;Kondo, Motohiko;Yamamoto, Toshio
改善叶片光合作用是提高作物产量的重要策略。本研究表明，水稻（Oryza sativa L.）数量性状位点GPS （GREEN FOR光合作用）通过调节羧化效率来控制光合速率。基于图谱的克隆显示，GPS与NAL1 （NARROW LEAF1）基因相同，NAL1是先前报道的控制侧叶生长的基因。GPS的高光合作用等位基因是NAL1的部分功能缺失等位基因。该等位基因增加了维管束之间的叶肉细胞数量，从而导致叶片变厚，并且多向性地提高了光合速率，而没有在之前发现的nal1突变体中观察到的有害副作用，如矮化植株。此外，谱系分析表明，水稻育种者在高产育种计划中反复选择了高光合作用等位基因。NAL1 （GPS）的鉴定与利用，为今后水稻高产育种提供了新的策略。
Improvement of leaf photosynthesis is an important strategy for greater crop productivity. Here we show that the quantitative trait locus GPS (GREEN FOR PHOTOSYNTHESIS) in rice (Oryza sativa L.) controls photosynthesis rate by regulating carboxylation efficiency. Map-based cloning revealed that GPS is identical to NAL1 (NARROW LEAF1), a gene previously reported to control lateral leaf growth. The high-photosynthesis allele of GPS was found to be a partial loss-of-function allele of NAL1. This allele increased mesophyll cell number between vascular bundles, which led to thickened leaves, and it pleiotropically enhanced photosynthesis rate without the detrimental side effects observed in previously identified nal1 mutants, such as dwarf plant stature. Furthermore, pedigree analysis suggested that rice breeders have repeatedly selected the high-photosynthesis allele in high-yield breeding programs. The identification and utilization of NAL1 (GPS) can enhance future high-yield breeding and provides a new strategy for increasing rice productivity.
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