title: Genetic analysis of 430 Chinese Cynodon dactylon accessions using sequence-related amplified polymorphism markers.
abstract: Although Cynodon dactylon (C. dactylon) is widely distributed in China, information on its genetic diversity within the germplasm pool is limited. The objective of this study was to reveal the genetic variation and relationships of 430 C. dactylon accessions collected from 22 Chinese provinces using sequence-related amplified polymorphism (SRAP) markers. Fifteen primer pairs were used to amplify specific C. dactylon genomic sequences. A total of 481 SRAP fragments were generated, with fragment sizes ranging from 260-1800 base pairs (bp). Genetic similarity coefficients (GSC) among the 430 accessions averaged 0.72 and ranged from 0.53-0.96. Cluster analysis conducted by two methods, namely the unweighted pair-group method with arithmetic averages (UPGMA) and principle coordinate analysis (PCoA), separated the accessions into eight distinct groups. Our findings verify that Chinese C. dactylon germplasms have rich genetic diversity, which is an excellent basis for C. dactylon breeding for new cultivars.
authors.affiliation: Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture, Danzhou 571737, China. huangchunqiong44@163.com.
authors.forename: Chunqiong
authors.initials: C
authors.lastname: Huang
authors.affiliation: Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture, Danzhou 571737, China. liuguodao2008@163.com.
authors.forename: Guodao
authors.initials: G
authors.lastname: Liu
authors.affiliation: Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture, Danzhou 571737, China. baichangjun@126.com.
authors.forename: Changjun
authors.initials: C
authors.lastname: Bai
authors.affiliation: Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture, Danzhou 571737, China. wwqnmg@163.com.
authors.forename: Wenqiang
authors.initials: W
authors.lastname: Wang
mesh_terms: D001947:Breeding / Q000379:methods; D002681:China; D016000:Cluster Analysis; D031744:Cynodon / Q000235:genetics*; D018744:DNA, Plant / Q000235:genetics*; D005819:Genetic Markers / Q000235:genetics*; D014644:Genetic Variation / Q000235:genetics*; D018745:Genome, Plant / Q000235:genetics*; D010802:Phylogeny; D011110:Polymorphism, Genetic / Q000235:genetics*; D017421:Sequence Analysis / Q000379:methods
chemical_list: D018744:DNA, Plant; D005819:Genetic Markers