标记器辅助育种加速了适应更广泛环境的多重耐压米基因型的发展
Vignesh Mohanavel1, Valarmathi Muthu1, Rohit Kambale1
1Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India.
Frontiers in plant science
|July 29, 2024
概括
开发多种耐压米品种对于未来的粮食安全至关重要. 这项研究成功地将八个主要的定量特征位点 (QTLs) 和基因嵌入到精英大米系中,使用标记器辅助选择,为各种环境创造了弹性大米.
科学领域:
- 植物育种和遗传学 植物育种和遗传学
- 农作物科学 农作物科学
- 农业生物技术 农业生物技术
背景情况:
- 米是重要的主食作物,受到众多生物和非生物压力的威胁.
- 提高产量和承受压力至关重要,以满足到2050年的全球需求.
- 开发适应气候变化的米品种是可持续农业的优先事项.
研究的目的:
- 开发高产水品种,增强对多重压力的耐受性.
- 在金字塔上,有八个主要的定量特征位点 (QTLs) /干旱,盐度,潜水,细菌叶病,爆发和胆耐受性的基因.
- 利用标记器辅助育种 (MAB) 来加快抗压水的发展.
主要方法:
- 采用了一种系统标记辅助金字塔 (MAB) 方法.
- 控制压力耐受性的八个主要QTLs/基因被引入精英大米背景 (CBMAS 14065).
- 先进的逆交衍生物相互交配,并使用前景选择选择选择后代,并将其基因定型到F4代.
主要成果:
- 确定了14个携带所有8个标QTL/基因的同卵性后代,并推进到F8代.
- 与复发的母系相比,这些系表现出对脱水和盐度的增强耐受性.
- 潜水下生存的显著改善 (90-95%) 和对细菌叶片炎和爆发的耐药性被观察到.
结论:
- 标记器辅助的金字塔设计有效地加速了多种耐压米基因型的发展.
- 开发出来的米系作为一种有价值的遗传库存,用于品种释放和未来的育种计划.
- 这些线路对于开发气候适应性超级大米品种至关重要,以确保未来的粮食安全.
更多相关视频
07:43Agrobacterium-Mediated Genetic Transformation, Transgenic Production, and Its Application for the Study of Male Reproductive Development in Rice
Published on: October 6, 2020
12.4K
06:10Identifying Mutations by High Resolution Melting in a TILLING Population of Rice
Published on: September 2, 2019
7.3K
相关概念视频
Plant Breeding and Biotechnology
18.9K
Crop cultivation has a long history in human civilization, with records showing the cultivation of cereal plants beginning at around 8000 BC. This early plant breeding was developed primarily to provide a steady supply of food.
18.9K
Responses to Drought and Flooding
10.6K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.6K
Trihybrid Crosses
23.2K
Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
23.2K
