Male reproductive disorders, Biology

Assignment Help:

MALE REPRODUCTIVE DISORDERS


Generally, about 5-10% of cattle bulls reaching sexual maturity would be suffering from poor reproductive efficiency or sterility. Crossbreeding has brought in its wake an additional problem related to male infertility. Domesticated cattle, classified into two major groups, zebu (Bos indicus) and European (Bos taurus) are believed to descend from the same wild species, the Aurox (Bos primigenius). Most of the cattle indigenous to the tropics belong to the zebu species. The potential for milk production is poorly developed in most zebu cattle. As various countries tackle the challenge of increasing the productivity of their dairy cow populations, the substantial genetic difference in milk production potential between Bos indicus breeds and Bos taurus breeds is too large to go unnoticed. Hence, application of artificial insemination has made crossbreeding between Bos taurus and Bos indicus populations widely possible for substantial increase in milk yield. However, the male crossbred offsprings are often inferior to purebreds in semen production. The proportion of males reserved for breeding and reaching successful semen freezing stage was lowest (29%) in Karan Fries (cross between Sahiwal or Tharparkar with Holstein Freisian cattle) and highest (45%) in Sahiwal cattle and poor semen quality was an important reason of disposal in Karan Fries bulls. Poor semen quality has been found to be the main reason of disposal in adult breeding Karan Fries bulls above 3 years of age. The relative importance of the bull in achieving high standards of fertility is tremendous to the extent that it is often said that the bull is half the herd.


Sub-fertility and sterility in bulls could emanate from genetic congenital abnormalities or developed during its lifetime.


Related Discussions:- Male reproductive disorders

Define the consequences of obesity, Define the Consequences of Obesity? ...

Define the Consequences of Obesity? Obesity has a number of adverse effects and is a risk factor for several problems as highlighted in Figure. It is a risk factor for all caus

Mesophytes, Mesophytes These plants grow in moist habitats and well-aer...

Mesophytes These plants grow in moist habitats and well-aerated soils. They prefer soil and air of moderate humidity but fail to swive in areas with water-logged soils or oveta

Preventive steps for global warming, Preventive steps for global warming : ...

Preventive steps for global warming :  Growing trees in vacant places. Growing social forests and protect them. Promoting abundant growth of phytoplankton plant species in marine

What is nidation, What is nidation? In which phase of the menstrual cycle d...

What is nidation? In which phase of the menstrual cycle does nidation occur? Nidation is the implantantion of the embryo in the uterus. Nidation happens around the 7th day afte

Punnett Sqares Virtual Lab, I need help with my biology virtual lab. Its du...

I need help with my biology virtual lab. Its due tomorrow

Iceberg phenomenon in relation to diabetes, Q. Iceberg phenomenon in relati...

Q. Iceberg phenomenon in relation to diabetes? Diabetes Mellitus cases are diagnosed by a doctor or a health worker by taking history, blood test for sugar level. But the undia

Importance of family and patient education - food allergy, Define Importanc...

Define Importance of Family and Patient Education - Food Allergy? Remember, involvement of the family and all other relevant caretakers along with the patient is crucial for pr

Explain the use of trichomoniasis in pregnancy, Use of trichomoniasis in pr...

Use of trichomoniasis in pregnancy Trichomoniasis in pregnancy has been associated with adverse pregnancy outcomes (D Soper, Am J Obstet Gynecol 2004; 190:281). Metronidazole

Define deuterostomes in animal kingdom, Define Deuterostomes in animal king...

Define Deuterostomes in animal kingdom? Coelomate animals are thought to have separated into two divergent lines of evolution in terms of the way embryos develop. In the embryo

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd