【摘 要】
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Background and Aims: Biogeographic investigation of temperate walnut trees is of great interest because of their ecological and economical importance.Our go
【机 构】
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KeyLaboratoryofResourceBiologyandBiotechnologyinWesternChina,MinistryofEducation,CollegeofLifeScienc
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Background and Aims: Biogeographic investigation of temperate walnut trees is of great interest because of their ecological and economical importance.Our goal was to perform an in-depth investigation of the geographical boundaries and evolutionary relationships of two walnut species including the effects of gene flow and lineage sorting.Methods: We studied the population genetic structure and phylogeographical history using a 234 bp fragment of mitochondrial DNA (mtDNA),a 739 bp fragment of chloroplast DNA (epDNA),and a total of 1740 bp of three nuclear DNA fragment (ITS,15R-8,and Jr5680) obtained from a total of 582 individuals of 17 species from 85 locations.Key Results: A total of seven mitotypes,16 haplotypes of chloroplast,and 142 haplotypes of three nuclear DNA were discovered among all samples.Eighty haplotypes were found for J.regia,whereas fouty-one haplotypes were identified for J.cathayensis.
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