Genotype-environment interaction between Chile and North America and between Chilean herd environmental categories for milk yield traits in Black and White cattle
Journal Title: Animal Science Papers and Reports - Year 2015, Vol 33, Issue 1
Abstract
In order to evaluate the expression of sire genetic evaluations obtained in North America for Chilean Black and White Cattle, genetic correlations were estimated for milk (MY), fat (FY) and protein (PY) yields, and for fat (F%) and protein (P%) contents between Chile, Canada and the US, from predicted transmitting abilities of common sires in two countries. Moreover, genetic correlations for the same traits were estimated between herd environmental categories formed according to MY levels, using bivariate analyses. Genetic correlation estimates for MY, FY, and PY between Chile-Canada (0.80, 0.61, and 0.70), and between Chile-US (0.79, 0.68, and 0.77), were lower than values obtained by simulation, assuming sire selection of the best 50%, and were also lower than the genetic correlations between Canada-USA, which were close to 1, suggesting a moderate genotype by country interaction. All genetic correlation estimates between countries for F% and P% were close to 1. No evidence of genotype-environment interaction was found for any trait between High and Low Chilean herd environmental categories based on MY, (genetic correlation estimates ≥0.96; not statistically different from 1). Results indicate that a single national dairy genetic improvement programme incorporating international evaluations could be implemented in southern Chile, rather than separate programmes for specific herd MY environments. Moderate genotype-environmental interaction between North American and Chilean environments was found for MY, FY, and PY. Results from across and within country analyses indicate that sire selection in North America for milk solids yield will produce relatively high correlated genetic responses for the southern Chile dairy production system characterized by grazing and a temperate climate.
Authors and Affiliations
Hugo H. Montaldo, Hector Castill-Juarez, Carlos Lizana, Eugenia G. Cienfuegos-Rivas, Alejandra Pelcastre-Cruz
Keywords
Related Articles
- EP ID EP70304
- DOI -
- Views 159
- Downloads 0
A novel pig gene, FASTK, differentially expressed in the muscle tissues from Wujin and Large White pigs
The mRNA differential display technique was used to investigate gene expression differences in the longissimus dorsi muscle from Wujin and Large White pigs. A fragment of one differentially expressed gene was isolated an...
The effects of vitamin E and vitamin C on sexual maturity body weight and hatching characteristics of Japanese quails (Coturnix coturnix japonica) reared under heat stress
Used were a total of 810 seven-day-old Japanese quails. The birds received a basal diet with three levels of two vitamins – vitamin E (ROVIMIX® E-50 SD; stable source of vitamin E in feed, DL-α Tocopheryl acetate) 60, 12...
Influence of combined supplementation of cows’ diet with linseed and fish oil on the thrombogenic and atherogenic indicators of milk fat
The study was conducted on Polish Holstein Black-and-White cows. From a herd of about 300 animals maintained in a free-stall dairy shed, two groups of 10 were selected by the analogue method: primiparous (P) and second-l...
The effect of CAST and RYR1 polymorphisms on carcass and meat quality traits in Pietrain crossbred pigs
The aim of this study was to determine the effect of the calpastatin (CAST) and ryanodine receptor (RYR1) genes polymorphism on carcass and meat quality traits in Pietrain crossbred pigs. No significant differences in th...
Forming of temperature-humidity index (THI) and milk production of cows in the free-stall barn during the period of summer heat
Evaluated were changes of temperature and relative air humidity inside a free-stall barn affecting the welfare of cows of three technological groups during a hot summer. The effects of selected microclimate parameters of...