How panicle angle and panicle position in the canopy determine pollination and seed set in rice (Oryza sativa L.)
How panicle angle and panicle position in the canopy determine pollination and seed set in rice (Oryza sativa L.)
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冠层中的圆锥花序角度和圆锥花序位置如何决定水稻的授粉和结籽（Oryza sativa L.）
DOI：
10.1080/1343943x.2020.1730702
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发表时间：
2020
影响因子：
2.5
通讯作者：
Takashi S. T. Tanaka & Tsutomu Matsui
中科院分区：
文献类型：
--
作者：
Aung Win;Takashi S. T. Tanaka & Tsutomu Matsui
我们研究了稻田中花序相对于冠层的位置和花序角度对水稻授粉和小花不育的影响。我们在开花阶段将盆栽水稻的圆锥花序设置为直立（0°）或倾斜（30°），在冠层上方或冠层高度（实验1）以及在冠层下方或冠层高度（实验2），每个重复三个。在实验1和实验2中，30°的圆锥花序倾斜使柱头上花粉粒总数<20的小花(TP20)的百分比分别增加21%和27%，柱头上萌发花粉粒总数<10的小花(GP10)的百分比增加21%和30%，并且小花不育性分别增加10%和26%。在所有试验中，小花不育与 GP10 相关。 GP10 与 TP20 相关。位置对小花不育的影响不显着。我们得出的结论是，即使在冠层条件下，30°的圆锥花序倾斜也显着增加了小花的不育性。圆锥花序的直立性应该是水稻育种和生产的一个重要目标。缩写TP20，柱头上花粉粒总数<20的小花的百分比； GP10，柱头上萌发花粉粒少于 10 个的小花的百分比。
We examined the effect of panicle position relative to canopy and of panicle angle on pollination and floret sterility in rice at anthesis in a paddy field. We set panicles of pot-grown rice at the flowering stage either upright (0°) or inclined (30°), either above or at canopy height (Experiment 1) and either beneath or at canopy height (Experiment 2), in three replications each. In Experiment 1 and Experiment 2, panicle inclination at 30° increased the percentage of florets with <20 total pollen grains on the stigma (TP20) by 21% and 27%, increased the percentage of florets with <10 germinated pollen grains on the stigma (GP10) by 21% and 30%, and increased floret sterility by 10% and 26%, respectively. Floret sterility was correlated with GP10 in all trials. GP10 was correlated with TP20. The effect of position on floret sterility was not significant. We conclude that panicle inclination at 30° significantly increased floret sterility even under the canopy condition. Uprightness of panicles should be an important objective in rice breeding and production.AbbreviationsTP20, percentage of florets with <20 total pollen grains on the stigma; GP10, percentage of florets with <10 germinated pollen grains on the stigma.
影响因子：
4.2
作者：
Matsui, Tsutomu;Kagata, Hisashi
通讯作者：
Kagata, Hisashi