Results 41 to 50 of about 1,385,080 (304)

Estimates of genetic and phenotypic parameters for reproductive traits in Iranian native Kordi sheep

open access: yesActa Scientiarum: Animal Sciences, 2017
The data set for estimation of genetic and phenotypic parameters of reproductive traits in Kordi sheep were collected from 1996 to 2013. The reproductive traits included age at first lambing (AFL), number of lambs born (NLB/EL) and weaned (NLW/EL) per ...
Davoud Ali Saghi, Ali Reza Shahdadi
doaj   +1 more source

Adaptation to a seasonally varying environment: a strong latitudinal cline in reproductive diapause combined with high gene flow in Drosophila montana [PDF]

open access: yes, 2011
Adaptation to seasonal changes in the northern hemisphere includes an ability to predict the forthcoming cold season from gradual changes in environmental cues early enough to prepare for the harsh winter conditions. The magnitude and speed of changes in
Knott, Emily   +11 more
core   +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

open access: yesPlants, 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   +6 more
doaj   +1 more source

Complex Reproductive Traits and Whole-Organism Performance [PDF]

open access: yesIntegrative and Comparative Biology, 2017
Arnold's 1983 path-analytic paradigm, considering "morphology, performance, and fitness," has been elaborated in several ways. For example, current versions recognize the level of "behavior" (including aspects of motivation) as a filter between performance abilities (only measurable if motivation is maximal) and fitness components.
T J, Orr, Theodore, Garland
openaire   +2 more sources

Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil

open access: yesRevista Brasileira de Zootecnia
This study aimed to estimate heritability, genetic, and residual correlations between reproductive traits such as age at first calving, calving interval, dry period, and first service period and linear type traits measured in Holstein cows born between ...
Tatiana Prestes Almeida   +6 more
doaj   +1 more source

Reproductive efficiency and milk yield in Sindhi breed cattle

open access: yesBrazilian Journal of Veterinary Medicine, 2020
The aim of this study was to identify the average of productive and reproductive traits in Red Sindhi females and evaluate if there is an influence of the reproductive traits on milk yield in this breed. Data related to reproductive and productive traits
Rafaella da Rocha Olivieri de Barros   +6 more
doaj   +1 more source

Effect of rosette size, clonality and spatial distribution on the reproduction of Vriesea carinata (Bromeliaceae) in the Atlantic Forest of Paraná, southern Brazil

open access: yesActa Botânica Brasílica, 2016
Plant size and clonality are important traits for explaining the reproductive effort of clonal plants. Larger plants can invest more resources into reproduction, and clonality is known to increase reproductive effort.
Marcelo Aparecido de Souza Silva   +1 more
doaj   +1 more source

Effects of selection for honey bee worker reproduction on foraging traits.

open access: yesPLoS Biology, 2008
The "reproductive ground plan" hypothesis (RGPH) proposes that reproductive division of labour in social insects had its antecedents in the ancient gene regulatory networks that evolved to regulate the foraging and reproductive phases of their solitary ...
Benjamin P Oldroyd, Madeleine Beekman
doaj   +1 more source

Relation of Production Traits and Reproduction Traits in Swine

open access: yesJournal of Animal Science and Technology, 2007
In order to investigate the relation of production traits and reproduction traits the data from Gyungnam heugdon(Berkshire) were analyzed. Pearson correlation coefficients of the reproductive traits including days to first farrowing, days to first breeding and no. of breeding for first litter with back fat thickness were ranged -.24 to -.26.
openaire   +2 more sources

Estimation of genetic parameters of pig reproductive traits

open access: yesFrontiers in Veterinary Science, 2023
IntroductionIn this study, we aimed to estimate the genetic parameters of the reproductive traits in three popular commercial pig breeds: Duroc, Landrace, and Yorkshire. Additionally, we evaluated the factors that influence these traits.MethodWe collected data from a large number of litters, including 1,887 Duroc, 21,787 Landrace, and 74,796 Yorkshire ...
Yiting Yang   +25 more
openaire   +3 more sources

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