Data/hora: 04/06/2024 01:31:10

Provedor de dados: | 74
País: | Brazil
Título: | Demarcation of informative chromosomes in tropical sweet corn inbred lines using microsatellite DNA markers
Autores: | Kashiani,Pedram; Saleh,Ghizan; Panandam,Jothi Malar; Abdullah,Nur Ashikin Psyquay; Selamat,Ahmad.
Data: | 2012-01-01
Ano: | 2012
Palavras-chave: | Microsatellite; Inbred line; Chromosome; Genetic variation; Linkage disequilibrium.
Resumo: | A study of genetic variation among 10 pairs of chromosomes extracted from 13 tropical sweet corn inbred lines, using 99 microsatellite markers, revealed a wide range of genetic diversity. Allelic richness and the number of effective alleles per chromosome ranged from 2.78 to 4.33 and 1.96 to 3.47, respectively, with respective mean values of 3.62 and 2.73. According to the Shannon's information index (I) and Nei's gene diversity coefficient (Nei), Chromosome 10 was the most informative chromosome (I = 1.311 and Nei = 0.703), while Chromosome 2 possessed the least (I = 0.762 and Nei = 0.456). Based on linkage disequilibrium (LD) measurements for loci less than 50 cM apart on the same chromosome, all loci on Chromosomes 1, 6 and 7 were in equilibrium. Even so, there was a high proportion of genetic variation in Chromosomes 4, 5, 8, 9 and 10, thereby revealing their appropriateness for use in the genetic diversity investigations among tropical sweet corn lines. Chromosome 4, with the highest number of loci in linkage disequilibrium, was considered the best for marker-phenotype association and QTL mapping, followed by Chromosomes 5, 8, 9 and 10.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000400012
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572012000400012
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.35 n.3 2012
Fonte: | info:eu-repo/semantics/openAccess