The Zea Mays BIG GRAIN 1 HOMOLOG 1 (ZM‐BG1H1) was ectopically expressed in maize. Elite commercial hybrid germplasm was yield tested in diverse field environment locations representing commercial models. Yield was measured in 101 tests across all 4 events, 26 locations over 2 years, for an average yield gain of 355 kg/ha (5.65 bu/ac) above control, with 83% tests broadly showing yield gains (range +2272 kg/ha to −1240 kg/ha), with seven tests gaining more than one metric ton per hectare. Plant and ear height were slightly elevated, and ear and tassel flowering time were delayed one day, but ASI was unchanged, and these traits did not correlate to yield gain. ZM‐BG1H1 overexpression is associated with increased ear kernel row number and total ear kernel number and mass, but individual kernels trended slightly smaller and less dense. The ZM‐BG1H1 protein is detected in the plasma membrane like rice OS‐BG1. Five predominant native ZM‐BG1H1 alleles exhibit little structural and expression variation compared to the large increased expression conferred by these ectopic alleles.

中文翻译：

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玉米BIG GRAIN1同源物的过表达增加了玉米籽粒的产量。

Zea Mays BIG GRAIN 1同源物1（ZM-BG1H1）在玉米中异位表达。精英商业杂交种质在代表商业模型的不同野外环境位置进行了产量测试。在所有4个事件中，在2年中的26个地点的101个测试中，对产量进行了测量，平均单产比对照高355 kg / ha（5.65 bu / ac），其中83％的测试大致显示单产（+2272 kg /公顷至-1240千克/公顷），其中有7项试验每公顷增产了超过1公吨。植株和穗高略有升高，穗和and的开花时间推迟了一天，但ASI保持不变，并且这些性状与产量增加无关。ZM‐BG1H1过表达与穗粒行数和总穗粒数及质量增加有关，但单个穗粒趋向于较小且密度较小。ZM‐BG1H1蛋白像水稻OS‐BG1一样在质膜中被检测到。与这些异位等位基因赋予的大量增加的表达相比，五个主要的天然ZM-BG1H1等位基因表现出很少的结构和表达变异。