Otro
Analysis of direct and indirect selection and indices in soybean segregating populations
Registro en:
Crop Breeding and Applied Biotechnology, v. 8, n. 1, p. 47-55, 2008.
1518-7853
2-s2.0-46849083910.pdf
2-s2.0-46849083910
Autor
Costa, Marcelo Marchi
Di Mauro, Antonio Orlando
Unêda-Trevisoli, Sandra Helena
Arriel, Nair Helena Castro
Bárbaro, Ivana Marino
Da Silveira, Gustavo Dias
Muniz, Franco Romero Silva
Resumen
Estimates of gain with selection are very useful in breeding programs to predict the success of selection. Index-based simultaneous selection makes breeding more successful. The objective of this report was to estimate and compare the genetic gain obtained by direct and indirect selection and using the classical and based on desired gain indices. The experiment was set up in the design of families with intercalated checks with 293 F3 soybean genotypes, distributed in 32 families derived from five crosses. Individual gains obtained with direct selection among and within families and mass selection were similar and in most cases higher than selection by indices. On the other hand, the highest total gains were obtained with selection indices and distributed across all traits. The classical index obtained the highest genetic gains.