Portal de Periódicos da CAPES

Artigo Acesso aberto Produção Nacional Revisado por pares

BIBTEX RIS

Genetic variability in maize and teosinte populations estimated by microsatellites markers

2011; UNIVERSIDADE FEDERAL DE SANTA MARIA; Volume: 41; Issue: 2 Linguagem: Inglês

10.1590/s0103-84782011005000005

1678-4596

Tatiana de Freitas Terra, Paula Wiethölter, Cícero Almeida, Sérgio Delmar dos Anjos e Silva, Fernanda Bered, Maria Jane Cruz de Melo Sereno, José Fernandes Barbosa Neto,

Wheat and Barley Genetics and Pathology

Wild species are important sources of genetic variability and may be exploited by breeding programs. Crosses between teosinte and maize occur freely and teosinte serves as genetic source of agronomic traits for introduction in maize. The objective of this study was to estimate genetic variability among and within maize and teosinte populations (Zea mays mexicana). Two sweet maize populations (BR400 and BR402), two common maize populations (Suwan and Pampa) and one teosinte population were analyzed using microsatellites markers. Results indicated that 64,5% of the variation was detected within the populations, suggesting the possibility of obtaining genetic progress by selection within each population. The analysis with 25 microsatellites loci enabled the identification of 92 alleles with a mean of 3.7 alleles per locus. The average Polymorphism Information Content (PIC) was 0.52. The percentage of polymorphic loci varied from 64% in the BR400 and Pampa populations to 80% in the teosinte population. The estimated genetic distance confirmed the genomic similarity of maize and teosinte.