productivity. ii. Cross breeding: Breeding between a superior male of one breed with a superior female of another breed. The cross bred progeny has superior traits ( hybrid vigour or heterosis).
iii. Interspecific hybridization: In this method of breeding mating is between male and female of two different species. The progeny obtained from such crosses are different from their parents, and may possess the desirable traits of the parents. Have you heard about Mule?
It was produced by the process of interspecific hybridization between a male donkey and a female horse. Controlled breeding experiments Artificial insemination: Artificial insemination is a technique in which the semen collected from the male is injected to the reproductive tract of the selected female. Artificial insemination is economical measure where fewer bulls are required and maximum use can be made of the best sire. Advantages of artificial insemination i.
It increases the rate of conception ii. It avoids genital diseases iii. Semen can be collected from injured bulls which have desirable traits. iv.
Superior animals located apart can be bred successfully. Multiple ovulation embryo transfer technology (MOET) It is another method of propagation of animals with desirable traits. This method is applied when the success rate of crossing is low even after artificial insemination. In this method Follicle stimulating hormone (FSH) is administered to cows for inducing follicular maturation and super ovulation.
Instead of one egg per cycle, - eggs can be produced by this technology. The eggs are carefully recovered non-surgically from the genetic mother and fertilized artificially. Thawing means to melt or become liquid. When the semen collected for artificial insemination is taken to far off places/stored for a long time in frozen condition it should be brought to room temperature slowly before use.
This process is called thawing. XI Std Biology-Zoology Chapter- The embryos at - celled stages are recovered and transferred to a surrogate mother. For another round of ovulation, the same genetic mother is utilized. This technology can be applied to cattle, sheep and buffaloes.
Advantage of this technology is to produce high milk yielding