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Karyotypes of the North American Parthenogenetic Whiptail Lizard Aspidoscelis velox, and Return of Aspidoscelis innotatus to the Synonymy of A. velox (Reptilia: Squamata: Teiidae)
American Museum Novitates ( IF 1.1 ) Pub Date : 2019-08-30 , DOI: 10.1206/3936.1
Charles J. Cole 1 , James E. Cordes 2 , James M. Walker 3
Affiliation  

Aspidoscelis velox is a triploid parthenogenetic species with clonal inheritance. We studied karyotypes of population samples representing diverse localities from much of its range. All specimens were triploids, but six different karyotypes were found with small differences among them, apparently resulting from chromosomal mutations that occurred after the origin of the species. As in other parthenogens, karyotypes and allozymes reveal variant clones in A. velox, but we do not recommend naming any of these genetic lineages as separate species. Specimens from the vicinity of Kanab, Kane County, Utah, have been treated by other herpetologists as a separate but morphologically similar species, Aspidoscelis innotatus, based on the assumption that they represented a diploid species. That assumption, made without any genetic evidence of ploidy, was recently based on evidence of histoincompatibility among certain population samples, but that could have been caused by factors other than ploidy (e.g., mutations at histocompatibility loci). We have examined specimens from Kane County, Utah, and all individuals were triploids similar to other population samples of A. velox from Arizona and New Mexico. 1 Division of Vertebrate Zoology (Herpetology), American Museum of Natural History. 2 Division of Sciences and Mathematics, Louisiana State University Eunice, LA. 3 Department of Biological Sciences, University of Arkansas, Fayetteville, AR. 2 AMERICAN MUSEUM NOVITATES NO. 3936

中文翻译:

北美孤雌生殖鞭尾蜥蜴 Aspidoscelis velox 的核型,以及 Aspidoscelis innotatus 的回归与 A. velox 的同义词(爬行动物:有鳞目:Teiidae)

Aspidoscelis velox 是具有克隆遗传的三倍体孤雌生殖物种。我们研究了代表其大部分范围内不同地区的人口样本的核型。所有标本都是三倍体,但发现了六种不同的核型,它们之间的差异很小,显然是由于物种起源后发生的染色体突变所致。与其他孤雌生殖一样,核型和等位酶揭示了 A. velox 中的变异克隆,但我们不建议将这些遗传谱系中的任何一个命名为单独的物种。来自犹他州凯恩县卡纳布附近的标本被其他爬虫学家视为一个单独但形态相似的物种 Aspidoscelis innotatus,基于它们代表二倍体物种的假设。这个假设,没有任何倍性的遗传证据,最近基于某些群体样本之间组织不相容性的证据,但这可能是由倍性以外的因素引起的(例如,组织相容性基因座的突变)。我们检查了来自犹他州凯恩县的标本,所有个体都是与来自亚利桑那州和新墨西哥州的 A. velox 的其他种群样本相似的三倍体。1 美国自然历史博物馆脊椎动物学部(爬虫学)。2 路易斯安那州立大学尤尼斯分校科学与数学系,洛杉矶。3 阿肯色大学生物科学系,阿肯色州费耶特维尔。2 美国博物馆 NOVITATES NO. 3936 我们检查了来自犹他州凯恩县的标本,所有个体都是与来自亚利桑那州和新墨西哥州的 A. velox 的其他种群样本相似的三倍体。1 美国自然历史博物馆脊椎动物学部(爬虫学)。2 路易斯安那州立大学尤尼斯分校科学与数学系,洛杉矶。3 阿肯色大学生物科学系,阿肯色州费耶特维尔。2 美国博物馆 NOVITATES NO. 3936 我们检查了来自犹他州凯恩县的标本,所有个体都是与来自亚利桑那州和新墨西哥州的 A. velox 的其他种群样本相似的三倍体。1 美国自然历史博物馆脊椎动物学部(爬虫学)。2 路易斯安那州立大学尤尼斯分校科学与数学系,洛杉矶。3 阿肯色大学生物科学系,阿肯色州费耶特维尔。2 美国博物馆 NOVITATES NO. 3936
更新日期:2019-08-30
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