甘内进杂交的遗传多样性和种群结构 通过SSR标志物测量甘内进杂交的遗传多样性和种群结构
Karpagam Elumalai1, Alarmelu Srinivasan1
1Division of Crop Improvement, ICAR-Sugarcane Breeding Institute, Coimbatore, Tamil Nadu 641007 India.
3 Biotech
|November 17, 2023
概括
这项研究使用SSR标志物分析了甘杂交,揭示了显著的遗传变异. 具有独特遗传基础的精英杂交品种在甘育种中提供了特征发展和气候变化适应的潜力.
科学领域:
- 植物遗传学和育种.
- 农学和作物科学 农学和作物科学
背景情况:
- 甘 (Saccharum spp.) 是一种葡萄糖. 育种计划需要多样化的遗传资源来增强特征和气候适应性.
- 在Saccharum和Erianthus属之间的内进杂交提供了一条引入新型遗传变异的途径.
研究的目的:
- 评估172种进化甘杂交物种的遗传多样性和种群结构,跨越三个贵族化阶段 (F1,BC1,BC2).
- 评估与遗传构成相关的产量和质量特征.
- 为了确定未来的甘育种计划的新生菌质.
主要方法:
- 研究了172种来自Saccharum spp.之间的交叉的内向杂交. 还有Erianthus arundinaceus. 这种植物.
- 分析了产量和质量特征.
- 采用30个简单序列重复 (SSR) 标记来评估遗传多样性,多态性和种群结构 (使用结构分析,PCoA,UPGMA).
主要成果:
- 在产量和质量组件中观察到显著的变化,甘的高度,单一的甘重量和甘产量显示出最大的变化.
- SSR分析揭示了456个多态等位基因,具有高多态信息含量 (PIC) 值,特别是在Saccharum spontaneum杂交物中.
- 结构分析发现51种混合体具有丰富的遗传变异和低基因流动,表明一种新的生殖质源. 基因分组与高贵化阶段相关.
结论:
- 进化混合体表现出广泛的遗传变异性和独特的遗传基础,适合开发特征特定的捐赠者.
- 这些杂交品种可以在甘育种计划中被利用用于基因增强.
- 鉴定到的胚胎质有可能开发出适应气候变化的甘品种.
相关概念视频
Dihybrid Crosses
75.0K
Overview
75.0K
Trihybrid Crosses
23.3K
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...
23.3K
Monohybrid Crosses
230.2K
Overview
230.2K
Incomplete Dominance
22.6K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
22.6K


