State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, Beijing, 100193, China.
Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
Nat Commun. 2017 Nov 14;8(1):1497. doi: 10.1038/s41467-017-01501-8.
During rice domestication and improvement, increasing grain yield to meet human needs was the primary objective. Rice grain yield is a quantitative trait determined by multiple genes, but the molecular basis for increased grain yield is still unclear. Here, we show that NUMBER OF GRAINS 1 (NOG1), which encodes an enoyl-CoA hydratase/isomerase, increases the grain yield of rice by enhancing grain number per panicle without a negative effect on the number of panicles per plant or grain weight. NOG1 can significantly increase the grain yield of commercial high-yield varieties: introduction of NOG1 increases the grain yield by 25.8% in the NOG1-deficient rice cultivar Zhonghua 17, and overexpression of NOG1 can further increase the grain yield by 19.5% in the NOG1-containing variety Teqing. Interestingly, NOG1 plays a prominent role in increasing grain number, but does not change heading date or seed-setting rate. Our findings suggest that NOG1 could be used to increase rice production.
在水稻驯化和改良过程中，提高粮食产量以满足人类需求是主要目标。水稻的粒产量是由多个基因决定的数量性状，但增加粒产量的分子基础仍不清楚。在这里，我们表明，编码烯酰辅酶 A 水合酶/异构酶的 NUMBER OF GRAINS 1（NOG1）通过增加每穗粒数而不影响每株穗数或粒重来提高水稻的粒产量。NOG1 可以显著提高商业高产品种的产量：在 NOG1 缺失的水稻品种中花 17 中引入 NOG1 可使粒产量增加 25.8%，而在含有 NOG1 的品种特青中过表达 NOG1 可使粒产量进一步增加 19.5%。有趣的是，NOG1 在增加粒数方面起着重要作用，但不改变抽穗期或结实率。我们的研究结果表明，NOG1 可用于提高水稻产量。
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