Disentangling the Genetic Architecture of Key Traits for Wheat Hybrid Seed Production.

IF 5.7 2区 生物学 Q1 PLANT SCIENCES
Sandra L Zapata, Albert W Schulthess, Samira El Hanafi, Renate H Schmidt, Valentin Hinterberger, Guoliang Li, Philipp H G Boeven, Jianting Chu, Mario Gils, Yong Jiang, Norman Philipp, Pierrick Varenne, Monika Spiller, Jochen C Reif
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Abstract

Hybrid wheat offers significant benefits such as increased yield and high yield stability. Despite this, the commercial adoption of wheat hybrids has been limited, primarily due to the high cost of hybrid seed production. Improving its efficiency requires a deeper understanding of key traits influencing hybrid seed set and their genetic bases. This study examines traits contributing to seed set beyond anther extrusion. Field trials were conducted across six environments using two European winter wheat cultivars, PIKO and HERMANN, and their derived double haploid population. Traits such as flowering time, visual anther extrusion, and plant height were measured. Field assessments of pollen shed were conducted to identify effective male pollen donors. Furthermore, traits including the interaction between male and female lines were examined. A quantitative trait locus on chromosome 1B was found for seed set, paving the way for marker-assisted selection. Our findings underscore the importance of considering traits beyond anther extrusion and pollen shed for cost-efficient hybrid seed production. Preselecting lines based on the begin and duration of male flowering, nicking, and plant height promise to be particularly effective. Consequently, breeders can significantly increase the amount of seed set by focusing on a reduced number of key traits.

小麦杂交制种关键性状的遗传结构分析。
杂交小麦具有显著的优势,如产量增加和产量稳定性高。尽管如此,小麦杂交品种的商业应用仍受到限制,主要原因是杂交种子生产成本高。提高杂交结实率需要对影响结实率的关键性状及其遗传基础有更深入的了解。本研究探讨了在花药挤压之外对种子结实有贡献的性状。利用两种欧洲冬小麦品种PIKO和HERMANN及其衍生的双单倍体群体在6个环境中进行了田间试验。测定了花期、视觉花药挤压、株高等性状。对花粉棚进行了实地评价,以确定有效的雄性花粉供体。此外,还研究了雌雄系间的相互作用等性状。在1B染色体上发现了一个数量性状位点,为标记辅助选择奠定了基础。我们的研究结果强调了考虑花药挤压和花粉脱落以外的性状对经济高效的杂交种子生产的重要性。根据雄性开花的开始和持续时间、缺口和株高来预选株系是特别有效的。因此,育种者可以通过专注于减少关键性状的数量来显著增加结实率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Experimental Botany
Journal of Experimental Botany 生物-植物科学
CiteScore
12.30
自引率
4.30%
发文量
450
审稿时长
1.9 months
期刊介绍: The Journal of Experimental Botany publishes high-quality primary research and review papers in the plant sciences. These papers cover a range of disciplines from molecular and cellular physiology and biochemistry through whole plant physiology to community physiology. Full-length primary papers should contribute to our understanding of how plants develop and function, and should provide new insights into biological processes. The journal will not publish purely descriptive papers or papers that report a well-known process in a species in which the process has not been identified previously. Articles should be concise and generally limited to 10 printed pages.
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