Title:	Genetic variability of watermelon accessions based on microsatellite markers.
Authors:	GAMA, R. N. C. da S. SANTOS, C. A. F. DIAS, R. de C. S.
Affiliation:	CARLOS ANTONIO FERNANDES SANTOS, CPATSA; RITA DE CASSIA SOUZA DIAS, CPATSA.
Date Issued:	2013
Citation:	Genetics and Molecular Research, v. 12, n. 1, p. 747-754, 2013.
Description:	We analyzed the genetic variability of 40 watermelon accessions collected from 8 regions of Northeastern Brazil using microsatellite markers, in order to suggest strategies of conservation and utilization of genetic variability in this species. These accessions are not commercial cultivars. They were sampled in areas of traditional farmers that usually keep their own seeds for future plantings year after year. An UPGMA dendrogram was generated from a distance matrix of the Jaccard coefficient, based on 41 alleles of 13 microsatellite loci. Analysis of molecular variance was made by partitioning between and within geographical regions. The similarity coefficient between accessions ranged from 37 to 96%; the dendrogram gave a co-phenetic value of 0.80. The among population genetic variability was high (φST = 0.319). Specific clusters of accessions sampled in 3 regions of Maranhão were observed while the other 5 regions did not presented specific clusters by regions. We conclude that watermelon genetic variability is not uniformly dispersed in the regions analyzed, indicating that geographical barriers or edaphoclimatic conditions have limited open mating. We suggest sampling a greater number of populations, so regional species diversity will be better represented and preserved in the germplasm bank.
Thesagro:	Melancia Conservação Citrullus Lanatus
NAL Thesaurus:	Watermelons
Keywords:	Acesso Variabilidade genética Marcadores microssatélites Watermelon
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPATSA)