Livestock Breeding and Reproduction - JSS3 Agricultural Science Past Questions and Answers - page 2

Livestock breeding primarily aims to enhance desirable traits in offspring, such as productivity, disease resistance, and overall performance. Through careful selection of breeding animals, farmers strive to improve genetic traits over successive generations, leading to better-quality livestock and increased farm productivity.

The estrous cycle, consisting of heat (estrus) and non-heat phases, regulates the timing of mating and conception in female mammals. During estrus, females are receptive to mating, facilitating fertilisation. Understanding and managing the estrous cycle is essential for effective breeding and reproductive success in livestock farming.

In the male reproductive system, the primary organs are the testes, epididymis, and accessory glands. The testes produce sperm, which is stored and matured in the epididymis before being transported to the female reproductive tract during mating. Accessory glands produce fluids that contribute to semen. In the female reproductive system, the ovaries, fallopian tubes, uterus, and vagina are key organs. The ovaries produce eggs, which are transported through the fallopian tubes to the uterus for implantation and foetal development. The vagina serves as the passage for mating and childbirth.

Livestock breeding techniques include natural breeding, artificial insemination (AI), embryo transfer (ET), and selective breeding. Natural breeding involves allowing animals to mate naturally, while AI involves the introduction of semen collected from male animals into females to facilitate controlled breeding.

Artificial insemination offers several advantages in livestock breeding, including controlled breeding, wider genetic selection, and disease control. It enables farmers to use semen from genetically superior males, even if they are not physically present on the farm. Additionally, AI reduces the risk of disease transmission compared to natural mating, leading to improved reproductive outcomes and enhanced genetic progress in livestock populations.