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首页> 外文期刊>Genetic Resources and Crop Evolution >Relationships among Avena species as revealed by consensus chloroplast simple sequence repeat (ccSSR) markers
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Relationships among Avena species as revealed by consensus chloroplast simple sequence repeat (ccSSR) markers

机译：通过共有叶绿体简单序列重复（ccSSR）标记揭示的Avena物种之间的关系

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Consensus chloroplast simple sequence repeat (ccSSR) makers were used to assess the genetic variation and genetic relationships of 80 accessions from 25 taxa of the genus Avena. Fifteen out of 16 ccSSR markers (93.75%) were polymorphic. A total of 51 alleles were detected at the 16 ccSSR loci. The number of alleles per locus ranged from 1 to 6, with an average of 3.2 alleles. Among these ccSSR loci, the highest polymorphism information content (PIC) value was 0.754, while the lowest PIC value was 0. The mean genetic similarity index among the 80 Avena accessions was 0.545, ranging from 0.188 to 1.000. To assess the usefulness of ccSSRs in separating and distinguishing between haplome (genome) groups, we used ordination by canonical discriminant analysis and classificatory discriminant analysis. Although discriminant analysis separated the haplome groups unequivocally, it was up to 69% predictive of correctly classifying an individual plant whose haplome(s) is unknown in the case where it belonged to the A haplome group, 75% where it belonged in the AC group, and almost 80% where it belonged in the ACD group. The analysis of genetic similarity showed that diploid species with the A haplome were more diverse than other species, and that the species with the As haplome were more divergent than other diploid species with the A haplome. Among the species with the C haplome, A. clauda was more diverse than A. eriantha and A. ventricosa. In the cluster analysis, we found that the Avena accessions with the same genomes and/or belonging to the same species had the tendency to cluster together. As for the maternal donors of polyploid species based on this maternally inherited marker, A. strigosa served as the maternal donor of some Avena polyploidy species such as A. sativa, A. sterilis and A. occidentalis from Morocco. A. fatua is genetically distinct from other hexaploid Avena species, and A. damascena might be the A genome donor of A. fatua. Avena lusitanica served as the maternal parents during the polyploid formation of the AACC tetraploids and some AACCDD hexaploids. These results suggested that different diploid species were the putative A haplome donors of the tetraploid and hexaploid species. The C genome species A. eriantha and A. ventricosa are largely differentiated from the Avena species containing the A, or B, or D haplomes, whereas A. clauda from different accessions were found to be scattered within different groups.
机译：使用共有叶绿体简单序列重复（ccSSR）标记盒评估来自Avena属25个分类群的80个种的遗传变异和遗传关系。 16个ccSSR标记中有15个（93.75％）是多态的。在16个ccSSR基因座上共检测到51个等位基因。每个基因座的等位基因数量范围为1至6，平均为3.2个等位基因。在这些ccSSR位点中，最高的多态性信息含量（PIC）值为0.754，而最低的PIC值为0。80个Avena种质之间的平均遗传相似性指数为0.545，范围从0.188至1.000。为了评估ccSSR在分离和区分单倍体（基因组）组中的有用性，我们通过规范判别分析和分类判别分析使用了排序。尽管判别分析明确区分了单倍体组，但在属于单倍体组的情况下，高达69％的预测可以正确地对单倍体未知的单个植物进行分类，而属于AC组的占75％。 ，几乎有80％属于ACD组。遗传相似性分析表明，具有A单体的二倍体物种比其他物种更具多样性，具有As单体的二倍体物种比具有A单体的其他二倍体物种更趋异。在具有C单倍体的物种中，克劳达菌比埃里希尼塔菌和文氏曲霉更具多样性。在聚类分析中，我们发现具有相同基因组和/或属于相同物种的Avena品种有聚在一起的趋势。至于基于这种母系遗传标记的多倍体物种的母体供体，A。strigosa充当了一些Avena多倍体物种的母体供体，例如来自摩洛哥的苜蓿A. sativa，A。sterilis和A. occidentalis。从基因上讲，A。fatua与其他六倍体Avena物种不同，而A. damascena可能是A. fatua的A基因组供体。 Avena lusitanica在AACC四倍体和一些AACCDD六倍体的多倍体形成期间充当母本。这些结果表明，不同的二倍体物种是四倍体和六倍体物种的推定的A单倍体供体。 C基因组物种A. eriantha和A.ventricosa与包含A，B，D单体的Avena物种有很大的区别，而来自不同种质的A. clauda被散布在不同的群体中。

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