Exotic alleles contribute to heat tolerance in wheat under field conditions

Exotic alleles contribute to heat tolerance in wheat under field conditions
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外来等位基因有助于小麦在田间条件下的耐热性

DOI:
10.1101/2022.02.09.479695
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发表时间:
2022
期刊:
--
影响因子:
--
通讯作者:
Molero G
Molero G
中科院分区:
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文献类型:
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作者:
Molero G

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全球变暖对粮食安全构成重大威胁,因此必须开发能够抵御未来气候不稳定的作物品种。通过评估149个春小麦品系在产量潜力和热胁迫条件下,我们展示了如何战略整合的外来材料显着增加产量热胁迫下相比,精英线,在有利条件下没有显着的产量惩罚。遗传分析揭示了这种耐热性背后的三个外来来源的遗传基因座,它们共同增加了50%以上的产量,并降低了约2 °C的冠层温度。我们发现了一个外星人。tauschiiiintrogressionunderlying最显着的这些协会,并提取introgrescedAe。tauschiigenes,揭示进一步解剖的候选人。将这些外来等位基因纳入育种计划可以作为一种先发制人的策略,以生产出能够抵御未来气候不确定性影响的高产小麦品种。
Global warming poses a major threat to food security and necessitates the development of crop varieties that are resilient to future climatic instability. By evaluating 149 spring wheat lines in the field under yield potential and heat stressed conditions, we demonstrate how strategic integration of exotic material significantly increases yield under heat stress compared to elite lines, with no significant yield penalty under favourable conditions. Genetic analyses reveal three exotic-derived genetic loci underlying this heat tolerance which together increase yield by over 50% and reduce canopy temperature by approximately 2 °C. We identified anAe. tauschiiintrogression underlying the most significant of these associations and extracted the introgressedAe. tauschiigenes, revealing candidates for further dissection. Incorporating these exotic alleles into breeding programmes could serve as a pre-emptive strategy to produce high yielding wheat cultivars that are resilient to the effects of future climatic uncertainty.
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