여우원숭이속(Lepilemuridae)의 핵형 비교 분석을 통해 나타난Lepilemur dorsalis와 Lepilemur leucopus의 종분화 양상 = Speciation Mode Reconstruction for Lepilemur dorsalis and L.leucopus Based on the Lepilemur Karyotype Analysis

다국어 초록 (Multilingual Abstract)

The aim of this study was to test the validity of the hypothesis that the karyotype of four species of Lepilemuridae were formed spontaniously from their ancestral hybrid karyotype. Hypothetical ancestral haploid Karyotype of Lepilemuridae is composed of 18 autosomes and X chromosomes. Lepilemur mustelinus(LMU) karyotype has four tendomly fused chromosomes and one Robertsonian translocated chromosome pairs otherwise Lepilemur septentrionalisis septentrionalisis (LSS) karyotype has only two pairs of translocated chromosomes. we reconstruct and suggest ancestral karyotype of LMU (ancLMU) and LSS (ancLSS), from which all four studied species of Lepilemuridae were derived. Hybrids of ancLMU and ancLSS were formed and produce differently fused equilibrated gametes via circular form arrangement during gametogenesis. To form Lepilemur leucopus haploid karyotype five homologous chromosome pairs were engaged in circular form arrangement. To form Lepilemur dorsalis haploid karyotype, only one homologous chromosome pair is arranged in other orientation at position in the same circle. When the new gamete fertilized with the same type of gamate to produce the new homozygote as existing Lepilemur dorsalis and Lepilemur leucopus. These results supports the speciation theory that new species can be formed in hybrid population through activated chromosome fusion, chromosome rearrangement in circular form at zygotene stage and production of equilibrated gametes to form homozygote new species.