Optimum genetic contribution applied to the selection of Santa Ines sheep

被引：2
|
作者：
da Silva Santos, Natanael Pereira [1 ]
Rocha Sarmento, Jose Lindenberg [2 ]
Carvalheiro, Roberto [3 ]
Guimaraes Campelo, Jose Elivalto [2 ]
de Sousa, Wandrick Hauss [4 ]
Silva Figueiredo Filho, Luiz Antonio [5 ]
Rego Neto, Aurino de Araujo [6 ]
Biagiotti, Daniel [7 ]
机构：
[1] Univ Fed Piaui, Campus Prof Cinobelina Elvas,BR-135,Km 3, BR-64900000 Bom Jesus, PI, Brazil
[2] Univ Fed Piaui, Ctr Ciencias Agr, Dept Zootecnia, Campus Socopo, BR-64049550 Teresina, PI, Brazil
[3] Univ Estadual Paulista, Fac Ciencias Agr & Vet, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP, Brazil
[4] Empresa Estadual Pesquisa Agr Paraiba SA, Rua Euripedes Tavares 210, BR-58013290 Joao Pessoa, PB, Brazil
[5] Inst Fed Maranhao, Campus Timon,Ave Luis Firmino de Sousa 3-907, BR-65635468 Timon, MA, Brazil
[6] Univ Estadual Piaui, Avenida Dom Pedro 2,629,Campus 11 Corrente, BR-64980000 Corrente, PI, Brazil
[7] Colegio Agr Bom Jesus, Campus Prof Cinobelina Elvas,BR-135,Km 3, BR-64900000 Bom Jesus, PI, Brazil
来源：
PESQUISA AGROPECUARIA BRASILEIRA | 2016年 / 51卷 / 06期
关键词：
coancestry; inbreeding; differential evolution; genetic gain; response to selection; DIFFERENTIAL EVOLUTION; INBREEDING DEPRESSION; OPTIMIZATION; POPULATIONS; GENERATIONS;
D O I：
10.1590/S0100-204X2016000600006
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
The objective of this work was to evaluate strategies of simulated selection by optimum contribution for the genetic gain, with restriction on coancestry, for the weight trait of 84-day old Santa Ines sheep. The analyses were performed using a differential evolution algorithm, which optimized an objective function accounting for average coancestry of the candidate animals for reproduction and genetic merit. The optimal selection strategy indicated the use of 19 rams, which would result in an expected average gain of 1.1259 units of standard deviation, and coancestry equal to 0.0249 (strategy 5). Compared to the selection based only on breeding values, the optimum strategy reduced the coancestry by 12%, and the genetic gain by only 3%. The selection of sheep by the optimum contribution offers different levels of genetic gain, which are achievable from restrictions on the coancestry. Therefore, it is possible to minimize the coancestry, or restrict it to a predefined value, and maximize the genetic gain while using the optimum contribution.
引用
收藏
页码：745 / 750
页数：6
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