Evaluation of environmental and genomic factors associated to fertility traits of elite Brahman bulls in the Colombian Orinoquia

被引：0

作者：

Torres Leyva, Guillermo Andres ^{[1
]}

Chacon Jaramillo, Liliana ^{[1
,2
]}

Ardila Silva, Ariosto ^{[1
]}

Burgos-Paz, William ^{[3
]}

机构：

[1] Univ La Salle, Grp Invest Reprod Mejoramiento Genet Anim Trop RE, Fac Ciencias Agropecuarias, Bogota, Colombia

[2] Univ La Salle, Direcc Posgrad, Bogota, Colombia

[3] Ctr Invest Tibaitata, Corporac Colombiana Invest Agropecuaria AGROSAVI, Bogota, Colombia

来源：

REVISTA DE INVESTIGACIONES VETERINARIAS DEL PERU | 2022年 / 33卷 / 01期

关键词：

fertility; SNPs; sperm; zebu; BREEDING SOUNDNESS EVALUATION; SEMEN QUALITY; SCROTAL CIRCUMFERENCE; GENETIC-PARAMETERS; BOS-INDICUS; TESTICULAR VOLUME; SPERM MOTILITY; AI BULLS; AGE; SELECTION;

D O I：

10.15381/rivep.v33i1.19648

中图分类号：

S85 [动物医学（兽医学）];

学科分类号：

0906 ;

摘要：

The aim of this study was to evaluate the effect of environmental factors on the fertility of elite Brahman bulls, as well as polymorphisms with significant association with these characteristics. Eighteen bulls with satisfactory Breeding Soundness Examination (BSE) were reproductively monitored in two breeding seasons in herds with 50 females suitable for reproduction. Blood samples were collected from the bulls for DNA extraction and genotyping of 26 151 SNPs with the GGP-LD chip (Geneseek). The environmental effects and genotypes of SNPs on fertility characteristics were analyzed. The mating season and the reproductive status had a significant impact (p<0.05) on the percentage of normal sperm and the concentration of sperm. Genomic analysis revealed a region on the BTA9 chromosome (55.7-55.9 Mb) associated with an increase in the percentage of normal sperm and a region on the BTA4 chromosome associated with a 2.25-fold increase in sperm concentration. The latter contains genes directly involved in metabolic pathways for the synthesis of steroids produced in Leydig cells and required in spermatogenesis. The association signals identified in this study coincided with regions that harbor genes of great relevance in reproduction.

引用

页数：16

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