Diallel analysis and genetic differentiation of tropical and temperate maize inbred lines

AUTOR(ES)

Kulka, Vania Portes, Silva, Tereza Aparecida da, Contreras-Soto, Rodrigo I., Maldonado, Carlos, Mora, Freddy, Scapim, Carlos Alberto

FONTE

Crop Breed. Appl. Biotechnol.

DATA DE PUBLICAÇÃO

2018-03

RESUMO

Abstract This study aimed to evaluate hybrids obtained by the cross among temperate × tropical elite maize lines, and to determine the genetic diversity and population differentiation of these inbred lines. Forty-nine hybrids were evaluated for seed yield, plant and ear heights, and for severity of Phaeosphaeria maydis and Exserohilum turcicum in four environments in Brazil. Hybrids were obtained from a partial diallel that involved seven tropical and seven temperate lines. Twenty-two SSR primers were used to evaluate the genetic relationship among the lines. Diallel showed the existence of significance for GCA and SCA effects; the genetic control of the traits was associated with additive and non-additive genetic effect. Results showed that exotic and previously protected temperate maize germplasm may provide novel alleles for resistance to P. maydis and E. turcicum and increase yield in tropical maize. Tropical inbred lines were allocated in different heterotic groups, suggesting an admixture condition among temperate and tropical materials.

Documentos Relacionados

• Genetic variability in inbred lines from a tropical maize germplasm under selection for phosphorus efficiency uptake.
• Genetic resistance of maize inbred lines to anthracnose leaf blight
• Comparison of RAPD, RFLP, AFLP and SSR markers for diversity studies in tropical maize inbred lines
• Comparative analysis of genetic diversity among the maize inbred lines (Zea mays L.) obtained by RAPD and SSR markers
• Optimization of particle bombardment parameters for the genetic transformation of Brazilian maize inbred lines.