Usher综合征是一种常见的累及眼和耳疾病的综合征[1-3]。1858年,第一次描述这个疾病的特征是由一位德国眼科医生Albrecht von Grafe开始的,之后便以他的名字命名[4]。1914年,一位英国眼科医生,在69例遗传疾病的基础上再次报道这种疾病[5...Usher综合征是一种常见的累及眼和耳疾病的综合征[1-3]。1858年,第一次描述这个疾病的特征是由一位德国眼科医生Albrecht von Grafe开始的,之后便以他的名字命名[4]。1914年,一位英国眼科医生,在69例遗传疾病的基础上再次报道这种疾病[5]。该病视力受损首先表现夜盲,进而周边视野逐渐缩小,最终形成管状视野。展开更多
The evolutionary dynamics of the ecoregions of southern South America and the species that inhabit them have been poorly studied,and few biogeographic hypotheses have been proposed and tested.Quaternary climatic oscil...The evolutionary dynamics of the ecoregions of southern South America and the species that inhabit them have been poorly studied,and few biogeographic hypotheses have been proposed and tested.Quaternary climatic oscillations are among the most important processes that have led to the current distribution of genetic variation in different regions of the world.In this work,we studied the evolutionary history and distribution of the Córdoba vesper mouse(Calomys venustus),a characteristic rodent of the region of which little is known about its natural history.Since the population dynamics of this species are influenced by climatic factors,this rodent is a suitable model to study the effects of Quaternary climatic oscillations in central Argentina.The mitochondrial cytochrome b gene was sequenced to analyze the phylogeography of C.venustus,and ecological niche modeling tools were used to map its potential distributions.The results of these approaches were combined to provide additional spatially explicit information about this species’past.Our results suggest that the Espinal was the area of origin of this species,which expanded demographically and spatially during the last glacial period.A close relationship was found between the Espinal and the Mountain Chaco.These results are consistent with previous studies and emphasize the role of the Espinal in the biogeographic history of southern South America as an area of origin of several species.展开更多
文摘Usher综合征是一种常见的累及眼和耳疾病的综合征[1-3]。1858年,第一次描述这个疾病的特征是由一位德国眼科医生Albrecht von Grafe开始的,之后便以他的名字命名[4]。1914年,一位英国眼科医生,在69例遗传疾病的基础上再次报道这种疾病[5]。该病视力受损首先表现夜盲,进而周边视野逐渐缩小,最终形成管状视野。
基金supported this study:Secretaría de Ciencia y Tecnología(SECyT-UNC 32720220400180CB)of Universidad Nacional de Córdoba and Agencia Nacional de Promoción Científica y Tecnológica(PICT 2016-1328 and PICT 2019-1545).
文摘The evolutionary dynamics of the ecoregions of southern South America and the species that inhabit them have been poorly studied,and few biogeographic hypotheses have been proposed and tested.Quaternary climatic oscillations are among the most important processes that have led to the current distribution of genetic variation in different regions of the world.In this work,we studied the evolutionary history and distribution of the Córdoba vesper mouse(Calomys venustus),a characteristic rodent of the region of which little is known about its natural history.Since the population dynamics of this species are influenced by climatic factors,this rodent is a suitable model to study the effects of Quaternary climatic oscillations in central Argentina.The mitochondrial cytochrome b gene was sequenced to analyze the phylogeography of C.venustus,and ecological niche modeling tools were used to map its potential distributions.The results of these approaches were combined to provide additional spatially explicit information about this species’past.Our results suggest that the Espinal was the area of origin of this species,which expanded demographically and spatially during the last glacial period.A close relationship was found between the Espinal and the Mountain Chaco.These results are consistent with previous studies and emphasize the role of the Espinal in the biogeographic history of southern South America as an area of origin of several species.
