HYBRIDIZATION OF BIRD SPECIES
HYBRIDIZATION OF BIRD SPECIES
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DOI：
10.1126/science.256.5054.193
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发表时间：
1992-04-10
期刊：
影响因子：
56.9
通讯作者：
GRANT, BR
中科院分区：
文献类型：
--
作者：
GRANT, PR;GRANT, BR
杂交，即物种间的杂交，为重大而迅速的进化提供了有利的条件。在鸟类中广泛分布。大约十分之一的物种是已知的杂交，而真正的全球发病率可能要高得多。一项对加拉帕戈斯岛上的达尔文雀种群的纵向研究表明，杂交种在几年内表现出比亲本物种更高的适应性。在这种气候波动的环境中，杂交种可能出于生态而不是遗传原因而偶尔处于不利地位。杂交对物种遗传学的重建、物种概念和定义的形成以及生物保护实践提出了挑战。
Hybridization, the interbreeding of species, provides favorable conditions for major and rapid evolution to occur. In birds it is widespread. Approximately one in ten species is known to hybridize, and the true global incidence is likely to be much higher. A longitudinal study of Darwin's finch populations on a Galapagos island shows that hybrids exhibit higher fitness than the parental species over several years. Hybrids may be at an occasional disadvantage for ecological rather than genetic reasons in this climatically fluctuating environment. Hybridization presents challenges to the reconstruction of phylogenies, formulation of biological species concepts and definitions, and the practice of biological conservation.