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首页> 外文期刊>Genetic Resources and Crop Evolution >Genetic diversity and relationships in Corchorus olitorius (Malvaceae s.l.) inferred from molecular and morphological data
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Genetic diversity and relationships in Corchorus olitorius (Malvaceae s.l.) inferred from molecular and morphological data

机译：从分子和形态学数据推导的Corchorus olitorius（Malvaceae s.l.）的遗传多样性和关系

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In this study, we investigated the genetic diversity and relationships in C. olitorius by analysing populations representing different distribution areas, and developed a hypothesis on the origin and spread of the species in the pantropics. We employed amplified fragment lengths polymorphism (AFLP) and morphometric analyses in a total of 101 C. olitorius accessions. Results of both data sets are mostly congruent. The molecular analysis indicated generally low genetic diversity within populations and the Nei’s gene diversity (He) ranged from 0.0457 to 0.0955 with a mean of 0.0763. Qualitative traits, especially related to leaf morphology, branching habit and stipule color were the taxonomically most informative characters. The highest morphological variability occurred within African accessions, indicating that this species originally evolved in Africa. In both analyses, the Asian materials were nested within African populations, especially with those from North and East Africa. This indicates an African origin of the species and we hypothesise that dispersal occurred via the Mediterranean–Indian trade routes instead of natural migration along the coasts from western Africa to the Indian subcontinent. Both analyses revealed materials from Ethiopia to be quite distinct. The highest number of private bands (N = 35), percent polymorphism (29.29%), and gene diversity (0.0955) were also detected in wild accessions collected from Ethiopia, suggesting a long-term spatial isolation of C. olitorius populations in the country. Germplasm samples from this region could therefore be a useful source of genetic variation in jute breeding programs.
机译：在这项研究中，我们通过分析代表不同分布区域的种群，研究了少毛隐孢子虫的遗传多样性和相互关系，并提出了有关该物种在泛热带地区的起源和传播的假说。我们采用了扩增的片段长度多态性（AFLP）和形态分析，共分析了101株olitorius菌种。这两个数据集的结果大部分是一致的。分子分析表明，人群中的遗传多样性普遍较低，Nei的基因多样性（He ）范围为0.0457至0.0955，平均值为0.0763。定性特征，特别是与叶片形态，分枝习性和托叶颜色有关的特征是分类学上最能提供信息的特征。形态变异最高的是非洲种质，表明该物种最初在非洲进化。在这两种分析中，亚洲材料都嵌套在非洲人口中，特别是北非和东非的人口。这表明该物种是非洲起源的，我们假设传播是通过地中海-印度贸易路线进行的，而不是沿着从西部非洲到印度次大陆的海岸自然迁移。两项分析均显示埃塞俄比亚的资料截然不同。在从埃塞俄比亚收集的野生种中也检测到最高的私人条带数量（N = 35），多态性百分比（29.29％）和基因多样性（0.0955），这表明该国的少毛隐孢子虫种群长期处于空间隔离状态。 。因此，该地区的种质样品可能是黄麻育种计划中遗传变异的有用来源。

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