STABILITY OF THE NORTHERN FLICKER HYBRID ZONE IN HISTORICAL TIMES: IMPLICATIONS FOR ADAPTIVE SPECIATION THEORY
STABILITY OF THE NORTHERN FLICKER HYBRID ZONE IN HISTORICAL TIMES: IMPLICATIONS FOR ADAPTIVE SPECIATION THEORY
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历史时期北方闪烁混合带的稳定性：对自适应物种理论的影响
DOI：
10.1111/j.1558-5646.1985.tb04086.x
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发表时间：
1985
期刊：
影响因子：
3.3
通讯作者：
ew B. Buchanan
中科院分区：
文献类型：
--
作者：
W. Moore;ew B. Buchanan
红轴和黄轴闪光之间的混合区在历史上一直稳定在美国大平原上。这一结论是基于对18个地点的历史和当代收藏品的多变量比较。适应性物种形成理论预测，杂交区应成为更广泛或更狭窄的渐渗杂交或加强交配前隔离机制的结果。这两个预测都没有得到证实。尽管有10，000 - 13，000年的杂交，亚种之间的交配仍然是不分青红皂白的。这些数据也是不一致的dynamicequilibrium假设，其中狭窄的混合区保持混合unfitness。根据这一假设，混合区可能会“流动”，除非它被困在人口密度低谷。混合区似乎与这种特征无关。
The hybrid zone between the Red‐ and Yellow‐shafted Flickers has been stable on the United States Great Plains in historical times. This conclusion is based on multivariate comparisons of historical and contemporary collections from 18 locales. Adaptive speciation theory predicts that the hybrid zone should either become broader or narrower as a result of introgressive hybridization or reinforcement of premating isolating mechanisms. Neither of these predictions was borne out. Despite 10,000‐13,000 years of hybridization, mating between subspecies remains indiscriminate. The data are also inconsistent with a dynamicequilibrium hypothesis wherein narrow hybrid zones are maintained by hybrid unfitness. According to this hypothesis, the hybrid zone would probably “flow” unless it was trapped by a population density trough. The hybrid zone does not appear to be associated with such a feature.