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Page 27 of articles about genetics-reproduction

Nick Serão

New ISU swine geneticist hopes to help improve reproductive efficiency in industry

Serão said he hopes and expects to be able to introduce new traits that are heritable, easy to measure and economically important, into selection indices, with the objective of improving genetic response for reproductive performance in sows and boars.

Genetics-ReproductionAbstract

Outcomes of gestation length in relation to farrowing performance

Premature births increase the number of intra-partum deaths and result in lower birthweights, the presence of apnoea, and severe metabolic alterations in piglets.

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NutritionAbstract

Selenium and vitamin E affects antioxidant status and reproductive performance in sows

Organic Se supplementation in sow diets may improve antioxidant capacity and reproductive performance.

Figure 3. Progressive motility (%) analysis by computerized systems using 3 different semen sample sizes.

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Genetics-ReproductionArticle

Control points in the preparation of semen doses: temperature control and quality parameters (1/2)

The impact of semen used for post-cervical AI is 2-3 times bigger than that used to produce cervical insemination doses; therefore, preparation of the doses should follow an even stricter control program.

Heat induction

News on heat induction

44% less piglets under 1000 gram

In recent years, users of Topigs Norsvin genetics have experienced a clear drop in piglets with a birth weight below 1000 grams. Based on genotypic information, the percentage of piglets born with a weight below 1000 grams dropped by 44% between 2012 and 2016.

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Genetics-ReproductionArticle

Practical tips to induce heat in gilts and sows

Boar exposure time, duration and frequency, proper boar: gilt or sow ratio, exposure methods, hormones, …

Genetics-ReproductionAbstract

Factors for improving reproductive performance of sows and herd productivity in commercial breeding herds

We review critical factors associated with reproductive performance of female breeding pigs, their lifetime performance and herd productivity in commercial herds. The factors include both sow-level and herd-level factors.

CAHE

China: 15° CAHE (China Animal Husbandry Expo)

China Animal Husbandry Expo, known as CAHE, is the largest livestock show in Asia. In 2017, CAHE attracted 161 655 visitors and 1 200 exhibitors from 38 countries and regions.

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Genetics-ReproductionAbstract

The dependence of the growth rate and meat content of young boars on semen parameters and conception rate

The objective of the research was to conduct semen parameter and conception rate analyses on the basis of growth rate and meat content.

Genetics-ReproductionAbstract

Characterizing body temperature and activity changes at the onset of estrus in replacement gilts

The study objective was to characterize body temperature and activity changes in replacement gilts at the onset of estrus in order to provide initial data to develop a remote estrus detection system for commercial swine operations.

Magapor hosted its 12th ITM meeting

The motto of this edition "Challenges of future in swine reproduction" implied sharing the latest novelties with a view to the horizon of the sector.

Australian sow herd to expand

Australian sow numbers are projected to rise to around 294,000 head in 2021–22.

Fig. 4: Schematic illustration of the topography of the testis and epididymis in boars, with suggested transducer placement when assessing the epididymal caput (= head; a), corpus (b) and cauda (= tail; c). The caput and cauda are best imaged longitudinally and the corpus transversally (from Kauffold et al., 2011).

Genetics-ReproductionArticle

Use of B-Mode ultrasonography to examine the genital tract of boars

This tool allows prediction of potential ejaculate yield and to aid in diagnosing subfertility/infertility associated with diseased tissues.

Genetics-ReproductionAbstract

Human chorionic gonadotrophin in early gestation improves sow fertility during summer

hCG stimulates growth of estrogenic follicles and CL function, and improves primiparous sow fertility during the summer months.

Update on the host genetics of resistance to porcine diseases

Dr. Jack Dekkers, Animal Breeding and Genetics, Department of Animal Science, Iowa State University, from the 2016 North American PRRS Symposium, December 3‐4, 2016, Chicago, Illinois, USA.