کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2836013 | 1164360 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Genetic differentiation and reproductive isolation in a Cyprinodon fish species flock from Laguna Chichancanab, Mexico
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The Cyprinodon species flock from Laguna Chichancanab, aged 8000 years, provides another potential case of sympatric speciation. The flock consists of seven morphologically distinct species, each within partially different trophic niches, and a group of specimens which cannot unequivocally be assigned to one of these species. Genetic analyses, based on mtDNA and five microsatellite loci, revealed significant genetic differentiation of one species, C. maya, from other members of the species flock, providing strong evidence for reproductive isolation. For the remaining members of the flock significant genetic structuring was detected, with some evidence of gene flow with the most abundant species C. beltrani. These analyses suggest that speciation proceeds with ongoing hybridisation, and further suggest that the morphologically unidentifiable specimens found in the lake are probably hybrids. I propose that in the Cyprinodon species flock besides disruptive selection sexual selection plays an important part in achieving and maintaining reproductive isolation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular Phylogenetics and Evolution - Volume 39, Issue 3, June 2006, Pages 865-872
Journal: Molecular Phylogenetics and Evolution - Volume 39, Issue 3, June 2006, Pages 865-872
نویسندگان
Ulrike Strecker,