在昆明動物研究所張亞平院士的帶領(lǐng)下,，碩士生張棟儒與云南大學(xué)的陳明勇博士以及葉輝教授合作,，對廣泛分布在云貴高原地區(qū)的雙團(tuán)棘胸蛙進(jìn)行了細(xì)致的種下群體遺傳學(xué)分析。
他們的結(jié)果提示目前雙團(tuán)棘胸蛙的遺傳結(jié)構(gòu)反應(yīng)了云南地區(qū)古水系發(fā)育的變遷,，與現(xiàn)代水系結(jié)構(gòu)不是對應(yīng)的,。目前呈現(xiàn)的各遺傳分支可能是與早上新世以及更新世期間古水系重排而造成的物種群體片段化現(xiàn)象有關(guān)。在早中更新世期間,，伴隨著劇烈的氣候變動,，該物種內(nèi)部發(fā)生了廣泛的群體擴(kuò)張。（生物谷Bioon.com）
生物谷推薦原文出處：
Molecular Ecology DOI: 10.1111/j.1365-294X.2010.04747.x
Genealogy and palaeodrainage basins in Yunnan Province: phylogeography of the Yunnan spiny frog, Nanorana yunnanensis (Dicroglossidae)
DONG-RU ZHANG 1,?, MING-YONG CHEN 1,2,3,?, ROBERT W. MURPHY 1,4, JING CHE 1, JUN-FENG PANG 1, JIAN-SHENG HU 2, JING LUO 2,5, SHAN-JIN WU 1,6, HUI YE 2, YA-PING ZHANG 1,5
Historical drainage patterns adjacent to the Qinghai-Tibetan Plateau differed markedly from those of today. We examined the relationship between drainage history and geographic patterns of genetic variation in the Yunnan spiny frog, Nanorana yunnanensis, using approximately 981 base pairs of mitochondrial DNA partial sequences from protein-coding genes ND1 and ND2, and intervening areas including complete tRNAIle, tRNAGln and tRNAMet. Two null hypotheses were tested: (i) that genetic patterns do not correspond to the development of drainage systems and (ii) that populations had been stable and not experienced population expansion, bottlenecking and selection. Genealogical analyses identified three, major, well-supported maternal lineages, each of which had two sublineages. These divergent lineages were completely concordant with six geographical regions. Genetic structure and divergence were strongly congruent with historical rather than contemporary drainage patterns. Most lineages and sublineages were formed via population fragmentation during the rearrangement of paleodrainage basins in the Early Pliocene and Early Pleistocene. Sympatric lineages occurred only in localities at the boundaries of major drainages, likely reflecting secondary contact of previously allopatric populations. Extensive population expansion probably occurred early in the Middle Pleistocene accompanying dramatic climatic oscillations.
