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首页> 外文期刊>Zoological Science >A Natural Population Derived from Species Hybridization in the Drosophila ananassae Species Complex on Penang Island, Malaysia
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A Natural Population Derived from Species Hybridization in the Drosophila ananassae Species Complex on Penang Island, Malaysia

机译：来自马来西亚槟城果蝇果蝇物种综合体物种杂交的自然种群。

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摘要

We surveyed natural population of the Drosophila ananassae species complex on Penang Island, Malaysia. Analyses of phenotypic traits, chromosome arrangements, molecular markers, and reproductive isolation suggest the existence of two species: D. ananassae and D. cf. parapallidosa. Molecular marker analysis indicates that D. cf. parapallidosa carries chromosome Y and 4 introgressions from D. ananassae. Thus, D. cf. parapallidosa seems to be a hybrid descendant that recently originated from a natural D. parapallidosa female x D. ananassae male cross. Furthermore, D. cf. parapallidosa behaves differently from authentic D. parapallidosa with respect to its reproductive isolation from D. ananassae. Premating isolation is usually seen in only the D. ananassae female x D. parapallidosa male cross, but we observed it in crosses of both directions between D. ananassae and D. cf. parapallidosa. In addition, hybrid males from the D. ananassae female x D. parapallidosa. cross are usually sterile, but they were fertile when D. ananassae female were mated with D. cf. parapallidosa male. We attempted an artificial reconstruction of the hybrid species to simulate the evolutionary process(es) that produced D. cf. parapallidosa. This is a rare case of natural hybrid population in Drosophila and may be a useful system for elucidating speciation with gene flow.
机译：我们调查了马来西亚槟城岛果蝇属物种复杂的自然种群。表型性状，染色体排列，分子标记和生殖隔离的分析表明存在两种物种：D. ananassae和D. cf。 palpallidosa。分子标记分析表明D。副pallidosa携带Y染色体和D. ananassae的4个基因渗入。因此，D。帕拉帕利多沙似乎是杂种后代，最近起源于自然的帕拉帕利多螺旋体雌性x D. ananassae雄性杂交。此外，D。副pallidosa的行为与真正的parapallidosa不同，从生殖的D. ananassae。通常仅在D. ananassae雌性X. parapallidosa雄性杂交中看到过早隔离，但我们在D. ananassae和D. cf.的两个方向的杂交中观察到了隔离。 palpallidosa。此外，来自D. ananassae雌性x D. parapallidosa的杂种雄性。杂交通常是不育的，但是当D. ananassae雌性与D. cf交配时它们是可育的。 palpallidosa男性。我们尝试人工重建杂种，以模拟产生D. cf.的进化过程。 palpallidosa。这是果蝇中自然杂交种群的罕见情况，可能是阐明基因流物种的有用系统。

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