Genetic diversity and phylogeography of Daphnia similoides sinensis located in the middle and lower reaches of the Yangtze River. Issue 8 (4th April 2019)

• Record Type: Journal Article
• Authors: Wu, Jianxun; Wang, Wenping; Deng, Daogui; Zhang, Kun; Peng, Shuixiu; Xu, Xiaoxue; Zhang, Yanan; Zhou, Zhongze
• Is Part Of: Ecology and evolution. Volume 9:Issue 8(2019)
• Page Start: 4362
• Page End: 4372
• Publication Date: 2019-04-04
• Subjects: Daphnia similoides sinensis -- genetic diversity -- molecular marker -- phylogeography -- The Yangtze River; Ecology -- Periodicals; Evolution -- Periodicals; 577.05
• DOI: 10.1002/ece3.4880
• Languages: English
• ISSNs: 2045-7758

Abstract

Abstract: Geographical patterns, climate, and environmental change have important influences on the distribution and spread of aquatic organisms. However, the relationships between the geographical pattern and phylogenetics of Daphnia as well as environmental change are not well known. The genetic diversity and phylogeography of seven D. similoides sinensis populations located in the middle and lower reaches of the Yangtze River were investigated based on the combination of mitochondrial ( CO I gene) and nuclear (14 microsatellite primers) markers. Based on the mitochondrial gene markers, D. similoides sinensis from the middle and lower reaches of the Yangtze River had one ancestral haplotype and two evolutionary clades. In addition, D. similoides sinensis population deviated from neutral evolution, showing signs of a bottleneck effect followed by population expansion. Based on the microsatellite markers, the seven D. similoides sinensis populations formed three main groups. The dendrogram (NJ/ME) showed that D. similoides sinensis based on the mitochondrial genes marker were obviously clustered two main clades, whereas there were three clades based on the microsatellite markers. Our results suggested that the habitat fragmentation due to the barrier of the dams and sluices promoted the genetic differentiation and phylogeography of D. similoides sinensis populations in the middle and lower reaches of the Yangtze River. Abstract : Geographical pattern, climate, and environmental change have an important influence on the distribution and spread of organisms. However, the relationships between the geographical pattern and phylogenetics of Daphnia as well as environmental change are well unknown. The genetic diversity and phylogeography of seven D. similoides populations located in the middle and lower reaches of the Yangtze River were investigated based on the combination of mitochondrial (16S rDNA, COI gene, and 12S rDNA) and nuclear markers (16 microsatellite markers). The habitat of D. similoides was gradually fragmented due to the barrier of the dams and sluices, which aggravated the differentiation of Daphnia populations. Consistent with the flow of water, two diffusion routes of D. similoides located in the middle and lower reaches of the Yangtze River were observed from the upstream to the downstream and from the tributaries to the mainstream.