Cotton is one of the most important economic crops in the world,and it provides natural fiber for the textile industry.With the advancement of the textile technology and increased consumption demands on cotton fiber,b...Cotton is one of the most important economic crops in the world,and it provides natural fiber for the textile industry.With the advancement of the textile technology and increased consumption demands on cotton fiber,both cotton yield and quality should be enhanced.However,cotton yield展开更多
为了研究福瑞鲤不同家系的遗传多样性,利用TRAP分子标记对生长速度有差异的家系（4个生长速度快,4个生长速度慢）进行了遗传分析。结果显示：8个家系的多态性条带数在9.41至12.00之间,多态性比率范围为52.04%～66.02%,多态信息含量为0.1...为了研究福瑞鲤不同家系的遗传多样性,利用TRAP分子标记对生长速度有差异的家系（4个生长速度快,4个生长速度慢）进行了遗传分析。结果显示：8个家系的多态性条带数在9.41至12.00之间,多态性比率范围为52.04%～66.02%,多态信息含量为0.1853～0.2430, Nei 遗传多样指数和 Shannon 信息指数分别为0.1875～0.2410和0.2780～0.3510,其中家系85^#的各遗传参数值最高,而家系74#的最低。家系间的遗传分化指数（Fst）及分子变异方差（AMOVA）分析结果显示,除了家系56^#与92^#（Fst=0.0516）及51^#与89^#（Fst=0.0956）这2对家系间处于中等程度的遗传分化（0.05≤Fst≤0.15）之外,其他家系间遗传分化水平均较低（Fst〈0.05）,群体的总遗传变异主要来源于家系内个体间的遗传差异,其方差分量的贡献率达98.3%。遗传距离分析结果表明,家系26^#与92#的遗传距离最大,家系85^#与89^#的遗传距离最小；基于此的UPGMA聚类分析结果显示,家系56^#与74^#以及家系85^#与89^#的亲缘关系比较近,聚类在同一分支上,而其他家系亲缘关系相对较远。研究结果说明8个福瑞鲤家系内遗传变异较大,遗传多样性水平较高,具有一定的育种潜力,可扩大福瑞鲤的选育空间。展开更多
Marker-assisted selection has become an integral component of many crop breeding programs in both the private and public sectors throughout the world. Various markers, such as RFLP, RAPD, AFLP and SSR are
文摘Cotton is one of the most important economic crops in the world,and it provides natural fiber for the textile industry.With the advancement of the textile technology and increased consumption demands on cotton fiber,both cotton yield and quality should be enhanced.However,cotton yield
文摘为了研究福瑞鲤不同家系的遗传多样性,利用TRAP分子标记对生长速度有差异的家系（4个生长速度快,4个生长速度慢）进行了遗传分析。结果显示：8个家系的多态性条带数在9.41至12.00之间,多态性比率范围为52.04%～66.02%,多态信息含量为0.1853～0.2430, Nei 遗传多样指数和 Shannon 信息指数分别为0.1875～0.2410和0.2780～0.3510,其中家系85^#的各遗传参数值最高,而家系74#的最低。家系间的遗传分化指数（Fst）及分子变异方差（AMOVA）分析结果显示,除了家系56^#与92^#（Fst=0.0516）及51^#与89^#（Fst=0.0956）这2对家系间处于中等程度的遗传分化（0.05≤Fst≤0.15）之外,其他家系间遗传分化水平均较低（Fst〈0.05）,群体的总遗传变异主要来源于家系内个体间的遗传差异,其方差分量的贡献率达98.3%。遗传距离分析结果表明,家系26^#与92#的遗传距离最大,家系85^#与89^#的遗传距离最小；基于此的UPGMA聚类分析结果显示,家系56^#与74^#以及家系85^#与89^#的亲缘关系比较近,聚类在同一分支上,而其他家系亲缘关系相对较远。研究结果说明8个福瑞鲤家系内遗传变异较大,遗传多样性水平较高,具有一定的育种潜力,可扩大福瑞鲤的选育空间。
文摘Marker-assisted selection has become an integral component of many crop breeding programs in both the private and public sectors throughout the world. Various markers, such as RFLP, RAPD, AFLP and SSR are
