Data/hora: 09/06/2024 14:44:10

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 17/02/2020
Data da última atualização: | 01/12/2020
Autoria: | MONTENEGRO, A. R.; SILVA, L. P. da; LOBO, R. N. B.
Afiliação: | ASSIS RUBENS MONTENEGRO, Universidade Federal do Ceará (UFC) - Fortaleza, CE, Brazil; LUCIANO PINHEIRO DA SILVA, Universidade Federal do Ceará (UFC) - Fortaleza, CE, Brazil; RAIMUNDO NONATO BRAGA LOBO, CNPC.
Título: | Effect of different mating systems on population structure and genetic progress of a simulated small flock.
Ano de publicação: | 2019
Fonte/Imprenta: | International Journal of Environmental Sciences and Natural Resources, v. 21, n. 1, e556051, 2019.
DOI: | 10.19080/IJESNR.2019.21.556051
Idioma: | Inglês
Conteúdo: | Abstract: Strategies to promote genetic progress or preserve genetic diversity in small populations may change due to population size. Higher inbreeding coefficients are associated to the use of breeding values predicted by mixed model methodology, which tends to score better animals within the best families. The reduced effective population size makes herds more susceptible to genetic drift and inbred matings. We compared three methodologies/software on simulated data that reproduced small-closed populations: Mate Selection (evolutionary differential), Gencont (Lagrange Multipliers) and SGRmate (linear programming). Algorithms optimized the objective function in order to achieve the higher genetic progress, but with an inbreeding coefficient of less than 10%, selecting the necessary number of sires and forming the reproductive pairs, except for Gencont, whose objective function was only to minimize the coancestry. All software generated populations with similar genetic progress. Mate Selection generated populations with the highest levels of inbreeding coefficients, similar to RANDOM, which presented best controlled mating between relatives. Gencont produced populations with intermediate levels of inbreeding. SGRmate maintained lowest levels of inbreeding due to higher number of sires selected and equal proportionality in combination of the pairs. Use of linear programming (SGRmate) was more efficient in maintaining the genetic diversity of small-closed populations
Palavras-Chave: | Animal population; Breeding programs; Differential evolutionary algorithm; Mating optimization; Optimal genetic contribution; Optimization methods.
Thesaurus Nal: | Animal genetics; Computer software; Linear programming; Selection criteria.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (39527-1) - UPC - AP - DD -  -  -  - DIS