Results 21 to 30 of about 127,456 (263)

Reproductive Traits Associated with Oxygen Consumption

Poultry Science, 1973
Abstract Hen-day production and hatchability of fertile eggs were investigated in high and low oxygen lines previously described by MacLaury and Johnson (Poultry Sci. 51: 591–597, 1972). After significant separation of the lines in 1965 both measures were significantly higher in the high oxygen line.
T H, Johnson, D W, MacLaury
openaire   +2 more sources

Genetics and genomics of reproductive performance in dairy and beef cattle

Animal, 2014
Excellent reproductive performance in both males and females is fundamental to profitable dairy and beef production systems. In this review we undertook a meta-analysis of genetic parameters for female reproductive performance across 55 dairy studies or ...
D.P. Berry, E. Wall, J.E. Pryce
doaj   +1 more source

Reproductive traits of pigs of Mangalitsa breed

Acta agriculturae Slovenica. Suplement, 2013
The aim of this study was to investigate the reproductive traits of sows of Swallow Belly Mangalitsa breed. The study was conducted in two herds (Herd 1 and 2) in which the pigs were grown in extensive conditions. The analysis covered reproductive characteristics of 53 sows in the first four parities (n = 129 litters).
Petrović, Milica, Savić, Radomir, Parunović, Nenad, Radojković, Dragan, Čedomir Radović   +4 more
openaire   +1 more source

Genetic relationship between milk urea nitrogen and reproductive performance in Holstein dairy cows

Animal, 2011
The objective of this study was to describe the genetic and phenotypic relationship between milk urea nitrogen (MUN) and reproductive traits in Iranian Holstein dairy cows. Test-day MUN data obtained from 57 301 dairy cows on 20 large dairy herds in Iran
Navid Ghavi Hossein-Zadeh, Mehrnaz Ardalan   +1 more
doaj   +1 more source

Heterosis of growth and reproductive traits in fowl

Poultry Science, 2002
Long-term divergent selection for high (HH) and low (LL) BW at 56 d of age in White Plymouth Rock chickens resulted in deviations from a typical chronological timeline for reproductive development. Line HH chickens of the 42nd generation of selection (S(42)) were heavier at 28, 56, 168, and 266 d of age, as well as at sexual maturity than those from ...
S M, Williams, S E, Price, P B, Siegel
openaire   +2 more sources

Exploring the non-genetic factors that affect reproduction traits of Saanen Goats in Indonesia

Journal of Agriculture and Rural Development in the Tropics and Subtropics, 2023
Adjustment of trait records for different non-genetic factors increases the accuracy of genetic parameters and enables more accurate selection. This study aimed to investigate the non-genetic factors affecting reproductive traits in Saanen goats at the ...
Janet Mamutse, Agus Susanto, Dattadewi Purwantini, Mas Yedi Sumaryadi, Yusuf Subagyo, Akhmad Sodiq   +5 more
doaj   +1 more source

Effects of Simulated Nitrogen Deposition and Micro-Environment on the Functional Traits of Two Rare and Endangered Fern Species in a Subtropical Forest

Plants, 2022
Although the effects of N deposition on forest plants have been widely reported, few studies have focused on rare and endangered fern species (REFs). Information is also lacking on the effects of micro-environments on REFs. We investigated the effects of
Lingbo Ji, Liping Wei, Lingling Zhang, Yuanqiu Li, Yang Tian, Ke Liu, Hai Ren   +6 more
doaj   +1 more source