Geographic variation in West African Agama picticauda: insights from genetics, morphology and ecology

IF 0.8 4区 生物学 Q3 ZOOLOGY African Journal of Herpetology Pub Date : 2019-03-07 DOI:10.1080/21564574.2018.1509139
S. Krishnan, Caleb OFORI-BOATENG, M. Fujita, A. Leaché
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引用次数: 3

Abstract

ABSTRACT West Africa is a region characterised by high species diversity and endemism, making it an ideal region to study the evolution of genetic and phenotypic differentiation. Species in this region often vary in morphology and genetics; however, the specific drivers of these differences have not been clearly identified. Focusing on populations in Ghana, we tested for correlations between geography, genetic diversity, morphology and ecology in the West African rainbow lizard (Agama picticauda). Genetic data were collected from 102 specimens using double-digest restriction site-associated DNA sequencing (ddRADseq) and the final data matrix included 5 976 loci and 20 624 single nucleotide polymorphisms (SNPs). Morphological data were collected from 42 specimens and included 6 meristic and 4 mensural characters. Ecological data were obtained from the WorldClim database to a resolution of 30 arcseconds. Population structure analyses supported up to five distinct populations of A. picticauda in Ghana. Discriminant function analyses were used to classify samples using the morphological data and ecological data. Ecology showed the strongest correlation with population genetic structure, whereas morphological data were only able to weakly differentiate three populations. We discuss the factors that might be responsible for correlations between phenotypes and genotypes in the context of A. picticauda natural history.
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西非画眉龙的地理变异:来自遗传学、形态学和生态学的见解
摘要西非是一个物种多样性和地方性较高的地区,是研究遗传和表型分化进化的理想地区。该地区的物种在形态和遗传学上往往各不相同;然而,这些差异的具体驱动因素尚未明确。以加纳的种群为重点,我们测试了西非彩虹蜥蜴(Agama picticauda)的地理、遗传多样性、形态和生态之间的相关性。使用双消化限制性位点相关DNA测序(ddRADseq)从102个样本中收集遗传数据,最终数据矩阵包括5 976个基因座和20 624个单核苷酸多态性(SNPs)。从42个标本中收集了形态学数据,包括6个分生组织和4个月经特征。生态数据是从WorldClim数据库中获得的,分辨率为30角秒。人口结构分析支持了加纳多达五个不同的画眉草种群。判别函数分析用于利用形态数据和生态数据对样本进行分类。生态学与种群遗传结构的相关性最强,而形态学数据只能微弱地区分三个种群。我们在A.picticauda自然史的背景下讨论了表型和基因型之间相关性的可能因素。
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来源期刊
CiteScore
3.00
自引率
6.70%
发文量
15
审稿时长
>12 weeks
期刊介绍: African Journal of Herpetology (AJH) serves as an outlet for original research on the biology of African amphibians and reptiles. AJH is an interdisciplinary journal that publishes original articles and reviews from diverse fields and disciplines, such as conservation, phylogenetics, evolution, systematics, performance, physiology, ecology, behavioural ecology, ethology, and morphology. The Journal publishes two issues a year. There are no page charges .
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