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

Predict whether narrowing or widening of the blood vessels, Body temperatur...

Body temperature is homeostatic ally regulated around a set point. Given your knowledge of negative feedback and homeostatic control system, predict whether narrowing or widening o

What is osseointegration in macroscopic biomechanical, Q. What is Osseointe...

Q. What is Osseointegration in macroscopic biomechanical? A fixture is osseointegrated if there is no progressive relative motion between the fixture and surrounding living bon

What type of membrane is the cell membrane, Concerning permeability what ty...

Concerning permeability what type of membrane is the cell membrane? The cell membrane is a selectively permeable membrane, i.e., it permits the passage of water and some select

Counselling for day to day management, Q. Counselling for day to day Manage...

Q. Counselling for day to day Management? As we know that diabetes is a chronic disease, a major part of its control requires counselling the patient and his family for day to

Biological valves, Biological Valves :  Biological valves are available fo...

Biological Valves :  Biological valves are available for all positions. For mitral position they are usually mounted on a stent (stent mounted) whereas for aortic position they ma

Define principle for estimation of cholesterol - lipids, Define Principle f...

Define Principle for Estimation of cholesterol - Lipids? Zlatkis and associates have evolved a method of quantitative determination of cholesterol based on a reagent containing

What is the significance of torsion, What is the significance of torsion? ...

What is the significance of torsion? An unusual twisting of the gastropod body which has left all members of class with an asymmetric body plan and a U-shaped alimentary tract,

Where in living beings can found mineral salts, Q. Which are mineral salts?...

Q. Which are mineral salts? Where in living beings can found mineral salts? Ans. Mineral salts are simple inorganic substances made of metallic chemical elements, like sodiu

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