Influences on semen traits used for selection of young AI boars
A minimum age is proposed for young boars to qualify for selection, or alternatively, age-related semen quality thresholds in young boars should be established.
Abstracts - Genetics and reproduction
Comparison of meat quality parameters in surgical castrated versus vaccinated against gonadotrophin-releasing factor male and female Iberian pigs reared in free-ranging conditions
Vaccination in females did not alter carcass and meat quality, and specific interests should consider reproductive behavior in free-range conditions.
The post-cervical insemination does not impair the reproductive performance of primiparous sows
More than 85% of primiparous sows can be successfully post-cervical inseminated with doses containing 1.5 × 109 sperm cells in the absence of the boar during insemination without impairing the reproductive performance.
Outcomes of gestation length in relation to farrowing performance in sows and daily weight gain and metabolic profiles in piglets
In conclusion, premature births increase the number of intra-partum deaths and result in lower birthweights, the presence of apnoea, and severe metabolic alterations in piglets.
Optimal timing of boar exposure relative to parturition for stimulation of lactation oestrus
This study evaluated the effect of full physical boar exposure at different stages of lactation on the incidence of lactation oestrus in both primiparous and multiparous sows.
Relative prolactin-to-progesterone concentrations around farrowing influence colostrum yield in primiparous sows
In conclusion, a greater PRL/P4 ratio 24 h prepartum, characterized by lower P4 concentrations and a trend for greater PRL concentrations peripartum, led to increased colostrum yield in primiparous sows.
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Effects of space allocation and parity on selected physiological and behavioural measures of well-being and reproductive performance in group-housed gestating sows
Our results suggest that at least at the chosen stocking densities, parity and space allocation have minimal effect on a number of commonly-used welfare measures.
5 1
AbstractThe use of oxytocin in liquid semen doses to reduce seasonal fluctuations in the reproductive performance of sows
On the basis of the presented results, it should be noted that the use of oxytocin into insemination doses improves the farrowing rate and other parameters of the reproductive performance of sows.
Reproductive performance of sows can be predicted by high numbers of pigs born alive in parity one
High PBA in parity 1 can be used to predict that a sow will have high reproductive performance and lifetime performance.
The effect of numbers of frozen-thawed boar sperm and addition of prostaglandin F2α at insemination on fertility in pigs
These results indicate that AI using 2.0 × 109 FTS can result in acceptable pregnancy rates and litter sizes but with no measurable benefit for addition of prostaglandin.
The inclusion of Duroc breed in maternal line affects pork quality and fatty acid profile
The aim of this study was to evaluate the effect of including different percentages of Duroc breed in maternal line and gender on meat quality and intramuscular and subcutaneous fatty acid composition.
Effect of sex of the pig on the sensory characteristics of the Biceps femoris and Semimembranosus muscles in dry‐cured hams
Organoleptic ham criteria for immunocastrated males hams were equivalent to those found for surgically castrated males and gilts hams, demonstrating the efficacy of vaccination in these study conditions.
Sex pre-selection of the offspring by using X or Y chromosome bearing spermatozoa sorted by flow cytometry
The main objective of this thesis was to develop a protocol to efficiently apply flow cytometric sex-sorting procedure on boar spermatozoa.
Search for salivary biomarkers of sexual development in pre‐pubertal gilts
These results suggest that some salivary metabolites could be biomarkers of the pre‐pubertal stage in gilts.
Consequences of different dietary energy sources during follicular development on subsequent fertility of cyclic gilts
These results suggest that it is possible to manipulate dietary insulin response in cyclic gilts and, thus, improve reproductive efficiency when feeding starch as the main energy source during the late luteal and follicular phases of the cycle.
Impact of parity and vaccination of sows against Atrophic Rhinitis on the lesion score in pigs
The objective of this study was to compare the rhinitis lesions scored on the snouts of pigs according to vaccine status and parity of their mother (primiparous and multiparous; vaccinated or unvaccinated).
The effect of pre- and post-mating dietary restriction on embryonic survival in gilts
Reducing post-mating feed intakes to maintenance levels impaired embryo survival.
Effects of lactation length and boar contact in early lactation on expression of oestrus in multiparous sows
Boar contact is an effective method to stimulate oestrus within 26 days of farrowing in both lactating and weaned sows.
Effectiveness of different farrowing induction protocols in sows using alphaprostol on day 114 of gestation
The aim of this study was to investigate the effects of different induction protocols when applied on d114 of gestation.
Genomic analysis reveals selection for Asian genes in European pigs following human-mediated introgression
Researchers from Wageningen University explain that a number of important characteristics of European pigs have Asian origins.
Measures of the ovaries and uterus during development of gilts selected for differences in uterine capacity
Selection for increased UC results in larger ovaries and uterine horns, but TRU was not useful for estimating these traits in gilts of the age studied.
Compounds from multilayer plastic bags cause reproductive failures in artificial insemination
This is the first described relationship between reproductive failure and toxic compounds released from plastic bags.
The battle of the sexes starts in the oviduct: modulation of oviductal transcriptome by X and Y-bearing spermatozoa
Data suggest that the oviduct functions as a biological sensor that screens the spermatozoon, and then responds by modifying the oviductal environment.
Effect of immunological stress to neuroendocrine and gene expression in different swine breeds
This study concluded that Laiwu had stronger capacity of immunological stress resistance and next was Lulai among three breeds. Chromium yeast helped piglets relieve immunological stress.
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