GENETIC PARAMETERS AND GENETIC TRENDS FOR TESTICULAR GROWTH AND REPRODUCTIVE TRAITS IN GUZERA CATTLE

被引：0

作者：

Grupioni, Natalia Vinhal ^{[1
]}

Freire Guidolin, Diego Gomes ^{[2
]}

Venturini, Guilherme Costa ^{[1
]}

Lobo, Raysildo Barbosa ^{[3
]}

Munari, Danisio Prado ^{[1
]}

机构：

[1] Univ Estadual Paulista, UNESP, FCAV, Dept Ciencias Exatas, BR-14884900 Jaboticabal, SP, Brazil

[2] Univ Anhanguera Uniderp, Prod & Gestao Agroind, BR-79037280 Campo Grande, MS, Brazil

[3] ANCP, BR-14020230 Ribeirao Preto, SP, Brazil

来源：

REVISTA CAATINGA | 2015年 / 28卷 / 02期

关键词：

Beef cattle; Genetic correlation; Scrotal circumference; Genetic Variability; SCROTAL CIRCUMFERENCE; GESTATION LENGTH; NELLORE; CYCLE;

D O I：

暂无

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

This study aimed to estimate genetic parameters and genetic trends for reproductive traits and testicular growth in Guzera cattle. Variance components were estimated through two-trait analyses using the restricted maximum likelihood method. To age at first calving (AFC), first calving interval (FC1), gestation period (GP), and scrotal circumference at 365 and 450 days (SC365 and SC450, respectively) were included the random residual and additive genetic effects and the fixed effects of contemporary group. The covariates cows age at calving and AFC were included in the model for SC365 and SC450 (linear and quadratic effects) and for FC1 (linear effect), respectively. For GP, The random maternal genetic effects were also considered. Heritability estimates ranged from 0.08 +/- 0.05 (FC1) to 0.48 +/- 0.11 (GP). Genetic trends were significant (P <0.05) for all traits with the exception of the maternal genetic effect of GP. The SC365, SC450 and GP traits, could be used as selection criteria for presenting additive genetic variability sufficient to respond to the selection process. The genetic correlation between AFC and scrotal circumferences (SC365 and SC450) indicates that selection for scrotal circumference in these ages, reduce the AFC of the females.

引用

页码：152 / 160

页数：9

共 27 条

[1]

Boldman K.G., 1995, A manual for use of MTDFREML

[2]

Boligon Arione Augusti, 2007, R. Bras. Zootec., V36, P565, DOI 10.1590/S1516-35982007000300007

[3] Additive genetic variability analysis in the growth characteristics of Nellore breed [J].

de Siqueira, RLPG ;

de Oliveira, JA ;

Lôbo, RB ;

Bezerra, LAF ;

Tonhati, H .

REVISTA BRASILEIRA DE ZOOTECNIA-BRAZILIAN JOURNAL OF ANIMAL SCIENCE, 2003, 32 (01) :99-105

[4] Genetic and phenotypic correlations among reproductive and productive traits of Nelore bulls [J].

Dias, Juliano Cesar ;

de Andrade, Venicio Jos ;

Martins, Jorge Andre Matias ;

Emerick, Lucas Luz ;

do Vale Filho, Vicente Ribeiro .

PESQUISA AGROPECUARIA BRASILEIRA, 2008, 43 (01) :53-59

[5]

DUARTE M. L. P. R, 2005, CULT AGRON, V14, P1

[6]

Eler JP, 2006, GENET MOL RES, V5, P569

[7]

ELER J. P., 2010, BOVINOCULTURA CORTE, V2, P801

[8]

Faria L.C., 2012, Arch. zootec., V61, P559, DOI 10.4321/s0004-05922012000400008

[9]

Forni S, 2005, J ANIM SCI, V83, P1511

[10] Heritability estimates and genetic correlations for body weight and scrotal circumference adjusted to 12 and 18 months of age for male Nellore cattle [J].

Frizzas, O. G. ;

Grossi, D. A. ;

Buzanskas, M. E. ;

Paz, C. C. P. ;

Bezerra, L. A. F. ;

Lobo, R. B. ;

Oliveira, J. A. ;

Munari, D. P. .

ANIMAL, 2009, 3 (03) :347-351

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