A breeding program for Nile tilapia in Brazil: Results from nine generations of selection to increase the growth rate in cages

被引：5

作者：

Massako Yoshida, Grazyella ^{[1
,2
]}

Lopes Oliveira, Carlos Antonio ^{[1
,3
]}

Campos, Eric Costa ^{[1
,4
,5
]}

Todesco, Humberto ^{[1
,5
]}

Araujo, Filipe C. T. ^{[1
,5
]}

Karin, Hanner Mahmud ^{[5
]}

Zardin, Aline M. S. O. ^{[5
]}

Bezerra Junior, Jailton S. ^{[5
]}

Alexandre Filho, Luiz ^{[1
,3
]}

Vargas, Lauro ^{[1
,3
]}

Ribeiro, Ricardo Pereira ^{[1
,3
]}

机构：

[1] Univ Estadual Maringa, Dept Anim Sci, PeixeGen Res Grp Management Breeding & Mol Genet, Maringa, Parana, Brazil

[2] Univ Chile, Fac Ciencias Vet & Pecuarias, Santiago, Chile

[3] Univ Estadual Maringa, Dept Anim Sci, Maringa, Parana, Brazil

[4] Univ Estadual Maringa, Ctr Agr Sci, Dept Anim Sci, Grad Program Anim Sci, Maringa, Parana, Brazil

[5] Univ Estadual Maringa, Grad Program Anim Sci, BR-87020900 Maringa, Parana, Brazil

来源：

JOURNAL OF ANIMAL BREEDING AND GENETICS | 2022年 / 139卷 / 02期

关键词：

daily weight gain; genetic trends; heritability; inbreeding; Oreochromis niloticus; INCREASED BODY-WEIGHT; OREOCHROMIS-NILOTICUS; GENETIC-PARAMETERS; FILLET TRAITS; GIFT STRAIN; IMPROVEMENT; PERFORMANCE; AQUACULTURE; RESPONSES;

D O I：

10.1111/jbg.12650

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Variance components and heritabilities for daily weight gain (DWG) were estimated for Nile tilapia farmed in cages across nine generations (G1-G9) of selection in a breeding program in Brazil. DWG was measured in 16,272 accumulated tagged animals representing 535 full- and half-sib families of Nile tilapia under cage farming. The additive genetic variance showed a slight variation (0.051-0.066), and heritability estimates ranged from 0.20 to 0.33. The common environmental effect accounted for a higher proportion of the total variance in DWG, especially in the last generations (6%-24%). A genetic trend based on all data available showed a substantial increase in the DWG (about 3.3% per generation) of Nile tilapia across nine generations of selection. Furthermore, our results demonstrate ample scope for further genetic improvement.

引用

页码：127 / 135

页数：9

共 50 条

[1] Genetic improvement of farmed tilapias: Response to five generations of selection for increased body weight at harvest in Oreochromis niloticus and the further impact of the project [J].