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首页> 外文期刊>Journal of Plant Research >Chromosome diversity and evolution in tribe Lilieae (Liliaceae) with emphasis on Chinese species
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Chromosome diversity and evolution in tribe Lilieae (Liliaceae) with emphasis on Chinese species

机译：百合科（百合科）的染色体多样性和进化

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摘要

In this paper, karyotype data of the tribe Lilieae in China were analyzed and been superimposed onto a phylogenetic framework constructed by the internal transcribed spacer to investigate the karyotype evolution. Ten parameters for analyzing karyotype asymmetry were assessed and karyotypic idiogram of five genera of Lilieae were illustrated. The results showed that, the relationship of genera in Lilieae that inferred from Maximum Parsimony criteria and Bayesian Inference were congruent with previous studies, which focused on higher level of Liliales. The karyotype showed distinctive among genera, mainly expressed on the location and amount of secondary constrictions and intercalary satellites: the genus Notholirion have neither of them, and the genera Cardiocrinum and Fritillaria have the secondary constriction alone; the genera Lilium and Nomocharis showed both features, and the distribute pattern of the intercalary satellites showed similarity among related clades. The asymmetry that assessed by several methods indicated that the evolution trend of Lilieae did not follow a single direction, but different in each genus. On the sectional level of the genus Lilium (including Nomocharis) the karyotype evolution included three major periods. Combining the chromosomal structure variations and karyotype asymmetry, the chromosome diversity and evolution in Lilieae were quite clear in the light of molecular inference.
机译：本文分析了中国百合科的核型数据，并将其叠加到由内部转录间隔子构建的系统发育框架中，以研究核型的演变。评估了用于分析核型不对称性的十个参数，并举例说明了百合科五个属的核型图。结果表明，从最大简约标准和贝叶斯推论推断出的百合科属的关系与以前的研究一致，后者集中于较高的百合科。核型在属中表现出独特性，主要表现在次级缩窄和inter间卫星的位置和数量上：Notholirion属均没有，而心cri属和贝母属仅具有次级缩窄。 Lilium和Nomocharis属都具有这两个特征，而cal间卫星的分布模式在相关进化枝之间也具有相似性。通过几种方法评估的不对称性表明，百合科的进化趋势并非遵循单一方向，而是每个属都不同。在百合属（包括Nomocharis）属的截面水平上，核型演化包括三个主要时期。结合分子结构推断和染色体结构变异和核型不对称性，百合科的染色体多样性和进化非常清楚。

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