Semen production traits

The present study was designed with the objectives of identifying genetic polymorphism of the PDE3A, PDGFRB and MARCH1 genes and their effects on semen production traits in a Holstein bull population.

10p vinarcissa 21-03-2023 3 1   Download

In the pig production industry, artificial insemination (AI) plays an important role in enlarging the beneficial impact of elite boars. Understanding the genetic architecture and detecting genetic markers associated with semen traits can help in improving genetic selection for such traits and accelerate genetic progress.

10p viansan2711 30-07-2021 9 1   Download

The present study was carried out to assess the relative expression of Y- specific genes [Sex determining region on Y-chromosome (SRY), Testis-specific protein Y-encoded (TSPY) and Ubiquitin specific peptidase 9-Y-linked (USP9Y)] and their association with semen production characters in crossbred Jersey bulls. The blood samples were collected from breeding bulls present in three frozen semen stations in Tamil Nadu.

8p trinhthamhodang1215 23-09-2020 25 2   Download

The objective of the study was to assess the effects of non-genetic factors such as farm, order of ejaculate, period, season of collection and age of the bull on semen quality traits of crossbred Holstein Friesian (CBHF) bulls. Data on a total of 22442 ejaculates from 72 CBHF bulls collected during the period from 1996 to 2014 were obtained from three organized farms in Tamil Nadu, India.

11p gaocaolon5 14-06-2020 12 1   Download

Data on 106197 semen ejaculates of 310 crossbred Jersey bulls maintained at three frozen semen stations in Tamil Nadu, India were collected from the year 2002 to 2014. The effects of various non-genetic factors such as farm, ejaculate number, period of semen collection, season of semen collection and age of the bulls at collection were studied on semen quality parameters using least-squares method.

11p nguathienthan4 21-04-2020 17 1   Download

Reproductive traits describe the animal’s ability to conceive, calve down and suckle the calf to weaning successfully (Davis 1993). These traits are important since they affect the herd size and off take. Reproductive performance is commonly evaluated by analysing female reproductive traits. The traits regularly considered include age at first calving, calving interval and calving rate. Male fertility traits are rarely included in genetic evaluations despite their influence on the female reproductive performance. These traits include semen quality and quantity traits and scrotal size.

61p conduongdinhmenh 07-05-2013 49 3   Download