Genetic diversity in section Rhizomatosae of the genus Arachis (Fabaceae) based on microsatellite markers

Genetics and Molecular Biology

Carla M.l.c.d. Angelici²  Andrea Akemi Hoshino²  Paula Macedo Nóbile²  Dario Abel Palmieri²  José F. Montenegro Valls¹  Marcos A. Gimenes¹  Catalina Romero Lopes² 

[1] ,Universidade Estadual Paulista Instituto de Biociências Departamento de GenéticaBotucatu SP ,Brazil

关键词: Arachis;    genetic diversity;    microsatellite;    peanut;    Rhizomatosae;   

DOI  :  10.1590/S1415-47572008000100016

来源: SciELO

【 摘 要 】

The genus Arachis (Fabaceae) native to South America, contains 80 species divided into nine sections, three of which contain species of special economic importance such as the cultivated peanut (Arachis hypogaea), belonging to the section Arachis, and some perennial forage species from sections Caulorrhizae and Rhizomatosae. We used microsatellite markers to assay genetic variability among 77 accessions of four species from section Rhizomatosae, the diploid Arachis burkartii (2n = 2x = 20) and the tetraploid Arachis glabrata, Arachis pseudovillosa and Arachis nitida (2n = 4x = 40). A total of 249 alleles were found in the fifteen loci analyzed and a high degree of intra and interspecific polymorphism was detected. The lowest intraspecific variation occurred in Arachis burkartii, while the smallest estimated interspecific value was between A. nitida and A. pseudovillosa and the largest was between A. burkartii and A. nitida. High observed heterozygosity was detected in A. glabrata. The diploid accessions grouped in one cluster and the tetraploid accessions in another. It was possible to distinguish all 77 accessions and the genetic distance between accessions could not be correlated with geographic origin.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License