干旱影响到大麦的发芽和种子特征的QTL映射使用重组杂交系人口人口
Oyeyemi O Ajayi1, Phil Bregitzer2, Kathy Klos2
1Cereal Crops Research Unit, USDA-ARS, 502 Walnut Street, Madison, WI, 53762, USA.
BMC plant biology
|May 27, 2023
概括
气候变化威胁着大麦生产;这项研究确定了干旱耐受性的关键遗传区域 (QTL),包括APX和DIR等候选基因. 这些发现有助于开发适应性大麦品种用于农业.
科学领域:
- 植物遗传学 植物遗传学
- 农业学是一种农业学.
- 适应气候变化 适应气候变化
背景情况:
- 干旱压力对全球大麦产量产生重大影响,影响了酒,酒和食品行业.
- 麦胚胎中的遗传多样性对于开发适应气候变化的作物品种至关重要.
- 确定稳定和适应性的定量特征位点 (QTL) 和候选基因对于提高干旱耐受性至关重要.
研究的目的:
- 确定与大麦干旱耐受性相关的新型,稳定和适应性QTL.
- 为了精确确定那些在大麦中赋予干旱弹性的候选基因.
- 通过标记器辅助选择评估开发改进大麦品种的潜力.
主要方法:
- 一个重组杂交线 (RIL) 种群 (n=192) 由耐旱的"奥蒂斯"大麦和易受干旱的"黄金承诺"大麦交叉形成.
- 在实地条件下,RIL群体遭受了受控的干旱压力,并评估了产量和蛋白质含量.
- 使用Barley 50k iSelect SNP Array进行基因定型,以确定QTL.
主要成果:
- 在多个大麦染色体中确定了23个QTL,影响了种子重量,干燥重量和蛋白质含量.
- 在2H和5H染色体上稳定的QTL显著解释了芽重量和种子蛋白质含量的变化.
- 2H和5H染色体上的QTL分别位于酸盐过氧化酶 (APX) 和Dirigent (DIR) 基因附近,它们因其在非生物应激耐受性中的作用而闻名.
结论:
- 已识别的候选基因 (APX,DIR) 可以用于标记器辅助的选择和基因操纵,以提高大麦的干旱耐受性.
- 开发具有耐旱性和可取的酒品质的大麦品种需要进一步的研究和潜在的更大的种群查.
关键词:
大麦大麦,大麦大麦,大麦大麦,大麦大麦.干旱 干旱 干旱 干旱黄金的承诺 黄金的承诺Malting 麦芽制造 在麦芽制造过程中奥蒂斯·奥蒂斯 (Otis) 是一个著名的作家.定量性质的特征位置映射映射.再组合的杂交品种线.更多相关视频
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