Bull fertility is an important target for genetic improvement, and early prediction using genetic
markers is therefore a goal for livestock breeding. We performed genome-wide association …

A genome-wide association study (GWAS) of age at first calving (AFC) using 813,114 first
lactation Holstein cows and 75,524 SNPs identified 2063 additive effects and 29 dominance …

The objective of this study was to perform a genome-wide association study (GWAS) to
detect chromosome regions associated with indicator traits of sexual precocity in Nellore …

Background Reproductive efficiency has a great impact on the economic success of pork
production. Gilts comprise a significant portion of breeding females and gilts that reach …

Decline in fertility in last few decades, especially in high milk producing dairy cows, is a
major concern in many countries. Fertility is a compound trait of many events leading up to …

Age and weight at puberty and the pattern of ovulatory activity from puberty to 26 mo of age
were studied in a total of 55 Brahman (B), Hereford (H), 5/8B-3/8H (B 5 H 3) and 5/16B …

Background Fertility is among the most important economic traits in dairy cattle. Genomic
prediction for cow fertility has received much attention in the last decade, while bull fertility …

Background In bovines, there are significant differences within and among beef breeds in
the time when bulls reach puberty. Although the timing of puberty is likely to be a multigenic …

Sheep breeds from Mediterranean area show reproductive seasonal patterns of oestrous
behaviour and ovulatory activity, mainly regulated by variation in the photoperiod. Maximal …

A current challenge in genetic improvement of cattle is to identify genomic selection
strategies that could work across breeds. Breed differences, scarcity of data, and lack of …