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Stability of wheat grain yields over three field seasons in the UK.
Food and Energy Security ( IF 4.0 ) Pub Date : 2018-09-19 , DOI: 10.1002/fes3.147
João Paulo Pennacchi 1, 2 , Elizabete Carmo-Silva 1 , P John Andralojc 2 , Tracy Lawson 3 , Alexandra M Allen 4 , Christine A Raines 3 , Martin A J Parry 1
Affiliation  

Ensuring food security in a changing climate is a major contemporary challenge and requires development of climate‐resilient crops that perform well under variable environments. The hypothesis that yield stability in suboptimal conditions is linked to yield penalties in optimal conditions was investigated in field‐grown wheat in the UK. The phenotypic responses, rate of wheat crop development, and final grain yield to varying sowing date, rainfall, air temperature, and radiation patterns were studied for a panel of 61 elite commercial wheat cultivars grown in the UK in 2012, 2013, and 2014. Contrasting climatic patterns, particularly rainfall accumulation and distribution over the season, influenced the relative performance of the cultivars affecting the duration of grain development stage and impacting on productivity. Indices for crop productivity, yield stability, and performance under suboptimal conditions revealed four cultivars with a combination of stable and high relative grain yields over the three seasons: Gladiator, Humber, Mercato, and Zebedee. Genetic similarity between cultivars partially explained yield performance in the contrasting seasons. The year of release of the cultivars correlated with grain yield but not with yield stability, supporting the contention that breeding for yield potential does not select for climate resilience and yield stability of crops. Further analysis of the outstanding cultivars may unravel target traits for breeding efforts aimed at increasing wheat yield potential and stability in the changing climate.

中文翻译:

英国三个田间的小麦籽粒产量稳定。

确保气候变化中的粮食安全是一项重大的当代挑战,需要开发在不同环境下表现良好的具有气候适应力的农作物。在英国田间种植的小麦中,研究了次优条件下的产量稳定性与最优条件下的产量损失有关的假说。研究了2012年,2013年和2014年在英国种植的61个优良商业小麦品种的表型反应,小麦作物的生长速率以及最终谷物产量对不同播种日期,降雨,气温和辐射模式的影响。相反的气候模式,特别是整个季节的降雨积累和分布,影响了品种的相对性能,影响了谷物发育阶段的持续时间并影响了生产力。作物生产力,产量稳定性和在次优条件下的表现指标显示,四个品种在三个季节中均具有相对较高的稳定和较高的相对谷物产量:角斗士,亨伯,梅拉托和泽贝迪。品种之间的遗传相似性部分解释了在不同季节的产量表现。品种的释放年份与谷物产量相关,而与产量稳定性不相关,这支持了以下观点:选育单产潜力不会选择气候适应力和农作物的产量稳定性。对优秀品种的进一步分析可能会揭示育种目标性状,以提高小麦单产潜力并在气候变化中保持稳定性。在次优条件下的表现和表现表明,四个品种在三个季节中具有稳定且较高的相对谷物产量,这两个品种分别是角斗士,亨伯,梅拉托和泽贝迪。品种之间的遗传相似性部分解释了在不同季节的产量表现。品种的释放年份与谷物产量相关,而与产量稳定性不相关,这支持了以下观点:选育单产潜力不会选择气候适应力和农作物的产量稳定性。对优秀品种的进一步分析可能会揭示育种目标性状,以提高小麦单产潜力并在气候变化中保持稳定性。在次优条件下的表现和表现表明,四个品种在三个季节中具有稳定且较高的相对谷物产量,这两个品种分别是角斗士,亨伯,梅拉托和泽贝迪。品种之间的遗传相似性部分解释了在不同季节的产量表现。品种的释放年份与谷物产量相关,而与产量稳定性不相关,这支持了以下观点:选育单产潜力不会选择气候适应力和农作物的产量稳定性。对优秀品种的进一步分析可能会揭示育种目标性状,以提高小麦单产潜力并在气候变化中保持稳定性。品种之间的遗传相似性部分解释了在不同季节的产量表现。品种的释放年份与谷物产量相关,而与产量稳定性不相关,这支持了以下观点:选育单产潜力不会选择气候适应力和农作物的产量稳定性。对优秀品种的进一步分析可能会揭示育种目标性状,以提高小麦单产潜力并在气候变化中保持稳定性。品种之间的遗传相似性部分解释了在不同季节的产量表现。品种的释放年份与谷物产量相关,而与产量稳定性不相关,这支持了以下观点:选育单产潜力不会选择气候适应力和农作物的产量稳定性。对杰出品种的进一步分析可能会揭示育种目标性状,以期在不断变化的气候中提高小麦的单产潜力和稳定性。
更新日期:2018-09-19
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