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Maize breeding for smaller tassels threatens yield under a warming climate

文献类型： 外文期刊

作者： Zhang, Yingjun 1 ; Dong, Xin 2 ; Wang, Hongyu 1 ; Lin, Yihsuan 1 ; Jin, Lian 3 ; Lv, Xuanlong 1 ; Yao, Qian 1 ; Li, Baole 1 ; Gao, Jia 1 ; Wang, Pu 1 ; Wang, Baobao 3 ; Huang, Shoubing 1 ;

作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Beijing, Peoples R China

2.Chongqing Acad Agr Sci, Chongqing, Peoples R China

3.Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing, Peoples R China

期刊名称：NATURE CLIMATE CHANGE （ 影响因子：29.6； 五年影响因子：31.1 ）

ISSN： 1758-678X

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Breeding programmes have increased the yields of major crops, including maize (Zea mays L.), but the suitability of optimized traits to future climates remains unclear. Here, by comparing the responses of 323 elite maize inbred lines from different breeding eras under natural field conditions, we show that while newer lines exhibit higher grain yield than the early released lines under standard growth, the bred trait of reduced tassel size increases the susceptibility of newly released lines to high temperature during flowering. We identified a potential threshold for spikelets per tassel (similar to 700), over which maize can produce a stably high seed set ratio under warm conditions, and show that small-tassel (<700 spikelets per tassel) genotypes are now unsuitable in 23.7% of global maize-growing regions. Our work highlights the need to consider possible climate change maladaptation resulting from breeding programmes.

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