We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Genetic structure of three Oryza AA genome species (O. rufipogon, O. nivara and O. sativa) as assessed by SSR analysis on the Vientiane Plain of Laos.
- Authors
Kuroda, Yosuke; Sato, Yo-Ichiro; Bounphanousay, Chay; Kono, Yasuyuki; Tanaka, Koji
- Abstract
Microsatellite (SSR) markers can reveal a high level of polymorphic loci, and are increasingly being used in population genetic structure studies. On the Vientiane plain of Laos all components of the rice crop complex exist, wild annual (O. nivara), wild perennial (O. rufipogon) and weedy relatives of rice as well as rice itself. To understand gene flow in the rice complex, the genetic structures of O. rufipogon (10 populations), O. nivara (10 populations) and O. sativa (24 samples) from across the Vientiane Plain, Laos, were compared. Higher genetic differentiation was detected among O. nivara populations (GST = 0.77, RST = 0.71) than O. rufipogon populations (GST = 0.29, RST = 0.28), whereas genetic diversity for all populations of these two wild species showed similar values (HT = 0.77 and 0.64 in O. rufipogon and O. nivara, respectively). Based on neighbor-joining tree constructed on the basis of genetic distance (DA), three genetic clusters were detected, corresponding to (1) O. sativa samples, (2) O. nivara populations and (3) O. rufipogon populations. Pairwise tests confirmed the genetic differentiation of the three species. Although none of the wild rice individuals used in this study had any cultivated-specific phenotypic traits, genetic admixture analysis detected more than 10% O. sativa membership in three O. rufipogon and one O. nivara populations, indicating that O. sativa alleles may cryptically persist in natural populations of O. rufipogon and O. nivara on the Vientiane Plain.
- Subjects
VIENTIANE Plain (Laos); MICROSATELLITE repeats; GENETIC polymorphisms; WILD rice; EUKARYOTIC cells; PLANT species; HABITATS; PHENOTYPES; CONSERVATION biology
- Publication
Conservation Genetics, 2007, Vol 8, Issue 1, p149
- ISSN
1566-0621
- Publication type
Article
- DOI
10.1007/s10592-006-9156-3