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首页> 外文期刊>Anais da Academia Brasileira de Ciencias >Evidence of separate karyotype evolutionary pathway in Euglossa orchid bees by cytogenetic analyses
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Evidence of separate karyotype evolutionary pathway in Euglossa orchid bees by cytogenetic analyses

机译：通过细胞遗传学分析证明Euglossa兰花蜜蜂分离的核型进化途径

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摘要

Euglossini are solitary bees considered important pollinators of many orchid species. Information regarding chromosome organization is available for only a small number of species in this group. In the present work, the species Euglossa townsendi and E. carolina were analyzed by cytogenetic techniques to collect information that may aid the understanding of their evolution and chromosomal organization. The chromosome number found was n = 21 for males and 2n = 42 for females in the two species. The distribution and amount of heterochromatin regions differed in the two species analyzed, where they were classified as “high” or “low” heterochromatin content, similarly to what has already been performed in social bee species of the genus Melipona. Banding patterns found in this study suggest that other mechanisms may have occurred in the karyotype evolution of this group, unlike those suggested for social bees and ants. Karyotype evolution of solitary bees appears to have occurred as an event separate from other hymenopterans and did not involve chromosome fissions and heterochromatin amplification.
机译：Euglossini是孤独的蜜蜂被认为是许多兰花种类的重要粉碎机。有关染色体组织的信息仅适用于该组中少量物种。在目前的工作中，通过细胞遗传学技术分析了Euglossa Townsendi和E. Carolina的物种，以收集可能有助于了解其进化和染色体组织的信息。发现的染色体数为n = 21，对于两种物种的女性，2n = 42。异铬胺区域的分布和量在分析的两种物种中不同，其中它们被归类为“高”或“低”异粒素含量，类似于Melipona属的社会蜂窝种类中已经进行的。本研究中发现的带状图案表明，与社会蜂师和蚂蚁建议的那些，可能发生了其他机制可能发生在该组的核型演变中。孤立蜜蜂的核型演变似乎已经发生作为与其他Hymenopterans分开的事件，并且没有涉及染色体裂缝和异铬胺扩增。

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