在干旱期间,合成六倍体小麦生殖质的生理和抗氧化反应
Niloofar Mokhtari1, Mohammad Mahdi Majidi2, Aghafakhr Mirlohi1
1Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan, 8415683111, Iran.
BMC plant biology
|August 4, 2024
概括
合成六倍体小麦衍生线 (SHW-DL) 显示出提高小麦耐旱能力的前景. 这些线条展示了用于增强小麦的宝贵遗传资源.
科学领域:
- 植物育种和遗传学
- 农业学是一种农业学.
- 植物生理学作物生理学
背景情况:
- 全球人口增长和气候变化需要高产,耐旱的小麦品种,特别是在干旱地区.
- 合成六倍体小麦衍生品系 (SHW-DL) 是通过将 durum wheat (AABB) 与 Aegilops tauschii (DD) 交叉人工创建的,以引入新基因进入普通面包小麦 (Triticum aestivum L).
- 本研究使用生理学,抗氧化酶活性和干旱耐受性指数评估,评估91个SHW-DL干旱耐受性的小组.
研究的目的:
- 为了评估91个合成六状小麦衍生品种 (SHW-DL) 的干旱耐受性.
- 在SHW-DL小组中识别优越的基因型,用于旨在增强干旱抵抗力的小麦育种计划.
- 了解SHW-DL对缺水压力的生理和生化反应.
主要方法:
- 在干旱压力条件下对91个合成六倍体小麦衍生品种 (SHW-DL) 的小组进行评估.
- 测量生理参数,包括谷物产量 (YLD),叶面积指数 (LAI) 和相对含水量 (RWC).
- 对抗氧化酶活性 (酸盐过氧化酶 (APX),酸酶 (CAT),过氧化酶 (POD),光合作用颜料,プロ林 (Pro) 和酸 (MDA) 含量的测定.
主要成果:
- 在SHW-DL小组中观察到谷物产量,生理和抗氧化特征的广泛变异和高遗传性,表明其作为干旱耐受性基因来源的潜力.
- 干旱压力导致YLD,LAI和RWC降低,但增加了甲基 (MDA) 含量,抗氧化酶活动 (APX,CAT,POD),光合作用颜料, (Pro) 和MDA.
- 与较高的谷物产量,光合作用色素和RWC,以及较低的MDA和H2O2活性一起的SHW-DL线条在水应激下表现优越,与普通小麦线条相比.
结论:
- 在合成和普通小麦生殖质中,水应激反应的显著变化允许选择适应性基因型.
- 特定的基因型 (54,98,102,105,122,124,143,159,196和198) 被确定为在小麦改进计划中直接使用或交叉繁殖的非常有希望的.
- 合成小麦生殖质提供了一个宝贵的资源,用于开发耐旱的小麦品种,以应对干旱环境中的农业挑战.
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