title: Analysis of a diverse global Pisum sp. collection and comparison to a Chinese local P. sativum collection with microsatellite markers.
abstract: Twenty-one informative microsatellite loci were used to assess and compare the genetic diversity among Pisum genotypes sourced from within and outside China. The Chinese germplasm comprised 1243 P. sativum genotypes from 28 provinces and this was compared to 774 P. sativum genotypes that represented a globally diverse germplasm collection, as well as 103 genotypes from related Pisum species. The Chinese P. sativum germplasm was found to contain genotypes genetically distinct from the global gene pool sourced outside China. The Chinese spring type genotypes were separate from the global gene pool and from the other main Chinese gene pool of winter types. The distinct Chinese spring gene pool comprised genotypes from Inner Mongolia and Sha'anxi provinces, with those from Sha'anxi showing the greatest diversity. The other main gene pool within China included both spring types from other northern provinces and winter types from central and southern China, plus some accessions from Inner Mongolia and Sha'anxi. A core collection of Chinese landraces chosen to represent molecular diversity was compared both to the wider Chinese collection and to a geographically diverse core collection of Chinese landraces. The average gene diversity and allelic richness per locus of both the micro-satellite based core and the wider collection were similar, and greater than the geographically diverse core. The genetic diversity of P. sativum within China appears to be quite different to that detected in the global gene pool, including the presence of several rare alleles, and may be a useful source of allelic variation for both major gene and quantitative traits.
authors.affiliation: Institute of Crop Sciences/The National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China.
authors.forename: Xuxiao
authors.initials: X
authors.lastname: Zong
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Redden
authors.forename: Qingchang
authors.initials: Q
authors.lastname: Liu
authors.forename: Shumin
authors.initials: S
authors.lastname: Wang
authors.forename: Jianping
authors.initials: J
authors.lastname: Guan
authors.forename: Jin
authors.initials: J
authors.lastname: Liu
authors.forename: Yanhong
authors.initials: Y
authors.lastname: Xu
authors.forename: Xiuju
authors.initials: X
authors.lastname: Liu
authors.forename: Jing
authors.initials: J
authors.lastname: Gu
authors.forename: Long
authors.initials: L
authors.lastname: Yan
authors.forename: Peter
authors.initials: P
authors.lastname: Ades
authors.forename: Rebecca
authors.initials: R
authors.lastname: Ford
mesh_terms: D002681:China; D017931:DNA Primers; D014644:Genetic Variation; D005838:Genotype; D018895:Microsatellite Repeats; D018532:Pisum sativum / Q000235:genetics*; D016133:Polymerase Chain Reaction; D025341:Principal Component Analysis; D017422:Sequence Analysis, DNA
chemical_list: D017931:DNA Primers