Molecular characterization of Cuban accessions of guava (Psidium guajava L.), establishment of a first molecular linkage map and mapping of QTLs for vegetative characters
2003; Linguagem: Inglês
ISSN
0394-9257
AutoresJ. Valdés-Infante, Rodrígues, Velázques, Gonzáles, D Sourd, Judith C. Rodriguez, D. E. Becker, W. Rohde, Enrique Ritter,
Tópico(s)Plant Pathogens and Fungal Diseases
ResumoA total of 62 guava genotypes assembled in the Cuban guava germplasm collection at Alquizar were characterized by molecular analysis applying the AFLP DNA marker technique. Phylogenetic relationships were established by the UPGMA method and the results compared to the classification according to available records of collection and pedigree. Furthermore, three guava mapping populations were produced by controlled crosses with the dwarf cultivar Enana as the female parent. From segregating AFLP DNA markers, a first molecular linkage map of guava was constructed. The high number of AFLP markers common to both parents of the first mapping population under investigation allowed the construction of an integrated map for the two parental genotypes. A total of 167 markers were arranged into 11 linkage groups possibly representing the 11 chromosomes (2n = 22) of the guava genome with 9 to 24 markers per linkage group and a total genome length of 1,349 cM. QTL analysis for vegetative characters identified a total of 15 loci
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