Genetic diversity of Brazilian triticales evaluated with genomic wheat microsatellites

Pesquisa Agropecuária Brasileira

Cibele Tesser Da Costa²  Ana Christina Sagebin Albuquerque¹  Alfredo Do Nascimento Junior²  Francismar Correa Marcelino¹  Jorge Fernando Pereira² 

[1] ,Embrapa TrigoPasso Fundo RS ,Brazil

关键词: X Triticosecale;    polymorphism information content;    transferability;    heterozygosity;    number of alleles;    frequency of alleles;    X Triticosecale;    índice de polimorfismo;    transferabilidade;    heterozigosidade;    número efetivo de alelos;    freqüência alélica;   

DOI  :  10.1590/S0100-204X2007001100009

来源: SciELO

【 摘 要 】

The objective of this work was to determine the genetic variability available for triticale (X Triticosecale Wittmack) crop improvement in Brazil. Forty-two wheat genomic microsatellites were used to estimate the molecular diversity of 54 genotypes, which constitute the base of one of the major triticale breeding programs in the country. Average heterozygosity was 0.06 and average and effective number of alleles per locus were 2.13 and 1.61, respectively, with average allelic frequency of 0.34. The set of genomic wheat microsatellites used clustered the genotypes into seven groups, even when the germplasm was originated primarily from only two triticale breeding programs, a fact reflected on the average polymorphic information content value estimated for the germplasm (0.36). The 71.42% transferability achieved for the tested microsatellites indicates the possibility of exploiting these transferable markers in further triticale genetic and breeding studies, even those mapped on the D genome of wheat, when analyzing hexaploid triticales.

【 授权许可】

CC BY   
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