在硬小麦xT中对与核相关的特征进行QTL映射. dicoccum 将种群分隔开来
Ana Paola Valladares García1,2, Francesca Desiderio2, Rosanna Simeone3
1Instituto de Conservación y Mejora de la Agrodiversidad Valenciana (COMAV), Universitat Politècnica de València, Valencia, Spain.
Frontiers in plant science
|October 18, 2023
概括
提高 durum wheat 的产量需要了解谷核的特征. 这项研究确定了控制谷核大小和形状的遗传网络,在4B染色体上发现了一个关键的QTL集群,可以在小麦育种中提高千粒谷核重量 (TKW).
科学领域:
- 植物遗传学和育种 植物遗传学和育种
- 农业科学 农业科学
- 分子生物学分子生物学
背景情况:
- 提高 durum小麦产量对于全球粮食安全和适应气候变化至关重要.
- 核的大小和形状是千核重量 (TKW) 的主要决定因素,这是谷物产量的关键组成部分.
- 了解核特征的遗传基础对于提高小麦产量潜力至关重要.
研究的目的:
- 在 durum小麦中剖析控制核大小 (长度,宽度,周长,面积) 和形状 (宽度与长度比,形状系数) 的遗传网络.
- 为了研究核子特征,核子重量,植物高度和标题日期之间的关系.
- 识别与改善的核特征和用于育种应用的TKW相关的遗传位置.
主要方法:
- 定量特征位置 (QTL) 地图绘制是在一个复合同血统 (RIL) 种群 (n=110) 上进行的.
- 该RIL种群是由麦 (MG5323) 和 durum wheat (cv. 拉丁语). 拉丁语). 在拉丁语中.
- 核心特征和农学特征的表型数据在四个不同的环境中收集.
主要成果:
- 总共有24个稳定的QTL被确定并分为9个群体,分别位于2A,2B,3A,3B,4B,6B和7A染色体上.
- 在4B染色体上显著的QTL集群与内核大小特征和TKW相关,其中有利的等位基因由麦母体MG5323.3贡献.
- 物理映射表明QTL集群与已知的基因重叠,包括4B染色体上的BIG GRAIN PROTEIN 1.
结论:
- 已识别的QTL为硬小麦的核发育和产量的遗传结构提供了洞察力.
- 麦加入MG5323拥有宝贵的遗传资源,可以改善硬麦的粒大小和TKW.
- 这些发现提供了基于基因组的指导,用于利用麦的多样性和开发用于小麦育种中的标记器辅助选择的分子标记物.
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