2009年10月10日 星期六

梭德氏赤蛙的族群遺傳研究結果不支持根據幼體形態將之切割為兩個種的假說(也就是說多齒赤蛙應為無效種), 而此蛙在台灣的族群遺傳結構格局可能導因於多次入侵

文獻來源: Jang-Liaw NH (張廖年鴻), Lee TH. 2009. Intraspecific Relationships of Populations of the Brown Frog Rana sauteri (Ranidae) on Taiwan, Inferred from Mitochondrial Cytochrome b Sequences. Zoological Studies 26(9): 608-616.

Abstract We studied the phylogenetic relationships among populations of Rana sauteri using partial sequences of the mitochondrial cytochrome b gene from 244 samples from 29 localities In Taiwan. We detected 77 haplotypes among these sequences. The phylogenetic trees contained five distinct lineages: the northern (NL), eastern (EL), southern hill (SHL), northern mountain (NML), and southern mountain (SML) lineages, defined by geographical distribution. The lineage phylogeny did not support the two-species hypothesis Inferred from larval morphology. To describe the possible colonization history of R. sauteri in Taiwan, we propose hypotheses of within-island differentiation and a multiple-invasion model. Using a molecular clock, we estimated the order of divergence times between lineages in order to test the migration hypothesis. The multiple-invasion model was well supported by the phylogeny and a nested clade network.

圖片連結: 環境資訊中心 (作者: 李鵬翔)