期刊
NEW PHYTOLOGIST
卷 161, 期 1, 页码 107-112出版社
WILEY
DOI: 10.1046/j.1469-8137.2003.00942.x
关键词
chromosomal rearrangements; karyotype; karyotypic evolution; recombination; reproductive isolation; speciation
资金
- NIGMS NIH HHS [R01 GM059065, R01 GM059065-04S1] Funding Source: Medline
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM059065] Funding Source: NIH RePORTER
Although karyotypic differences between species have long been recognized, the question of whether these mutations play a causal role in speciation remains unanswered. This is because most models of chromosomal speciation focus on underdominance, which presents a theoretical paradox in that the strength of an underdominant barrier is inversely proportional to its fixation probability. To counter this problem, a new model has been proposed that focuses on the modification of effective recombination rates, whereby rearrangements facilitate the build up of linkage disequilibrium in the presence of gene flow. This model is discussed, along with new supporting data from the Solanaceae. (C) New Phytologist (2003).
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