Overcoming the trade-off between grain weight and number in wheat by the ectopic expression of expansin in developing seeds leads to increased yield potential.
Overcoming the trade-off between grain weight and number in wheat by the ectopic expression of expansin in developing seeds leads to increased yield potential.
复制标题
DOI：
10.1111/nph.17048
复制
发表时间：
2021-04
期刊：
影响因子：
--
通讯作者：
McQueen-Mason SJ
中科院分区：
文献类型：
--
作者：
Calderini DF;Castillo FM;Arenas-M A;Molero G;Reynolds MP;Craze M;Bowden S;Milner MJ;Wallington EJ;Dowle A;Gomez LD;McQueen-Mason SJ
小麦是全球种植最广泛的作物，提供人类20%的热量和蛋白质。实现遗传产量潜力的阶跃变化对于确保粮食安全至关重要，但努力受到谷物大小和数量之间明显权衡的阻碍。扩展蛋白是通过增强细胞壁中的应力松弛而在植物生长中发挥重要作用的蛋白质，其抑制细胞扩展。在这里，我们描述了在早期发育的小麦种子中α-expansin的靶向过表达如何导致晶粒尺寸的显着增加，而不会对晶粒数量产生负面影响，从而在田间条件下提高产量。表现最好的转基因品系的平均谷粒重量比对照高12.3%，这转化为在田间试验中使用农艺学上适当的植物密度的谷粒产量增加11.3%。这种靶向转基因方法为克服许多作物产量提高的共同瓶颈提供了机会。另见科斯格罗夫对这篇文章的评论，230：403 - 405。
Wheat is the most widely grown crop globally, providing 20% of all human calories and protein. Achieving step changes in genetic yield potential is crucial to ensure food security, but efforts are thwarted by an apparent trade‐off between grain size and number. Expansins are proteins that play important roles in plant growth by enhancing stress relaxation in the cell wall, which constrains cell expansion. Here, we describe how targeted overexpression of an α‐expansin in early developing wheat seeds leads to a significant increase in grain size without a negative effect on grain number, resulting in a yield boost under field conditions. The best‐performing transgenic line yielded 12.3% higher average grain weight than the control, and this translated to an increase in grain yield of 11.3% in field experiments using an agronomically appropriate plant density. This targeted transgenic approach provides an opportunity to overcome a common bottleneck to yield improvement across many crops. See also the Commentary on this article by Cosgrove, 230: 403‐405.
登录
查看更多内容
一种还原主义的方法，用于剖析小麦的晶粒重量和产量。
影响因子：
11.4
作者：
Brinton J;Uauy C
通讯作者：
Uauy C
影响因子：
6.9
作者：
Fahy B;Siddiqui H;David LC;Powers SJ;Borrill P;Uauy C;Smith AM
通讯作者：
Smith AM
影响因子：
5.8
作者：
Ferrante, Ariel;Savin, Roxana;Slafer, Gustavo A.
通讯作者：
Slafer, Gustavo A.
影响因子：
5.1
作者：
Digeon, JF;Guiderdoni, E;Gautier, MF
通讯作者：
Gautier, MF
影响因子：
5.1
作者：
GAUTIER, MF;ALEMAN, ME;JOUDRIER, P
通讯作者：
JOUDRIER, P