Menjaga kualitas kodok lembu. Genetic dicreasing can be occur to all of animals, and plants. It’s signed by generation characteristic which not same by the broodstocks. Or with other word the children don’t carry out broodstock characteristic, or bader than broodstocks. The sign can be seen by the growth is slowler, abnormal in body shape, and its strong discrease, or don’t tolerant by change environmet, diseases attack.
There are many factor, why genetic decrease. One of them is wrong in using broodstock. Because, minimal in genetic knowledge of culturis, many culturis which not well in using broodstock, by spawn broodstocks in a generation. Spawning in one generation has cause inbreeding, or mixeing blood the both of them.
Like rice has be porridge, bullfrog has decrease. Some excess of bullfrog only a memory. In 1998, me as a writter has discribed a good way for standing quality of bullfrog, but it’s not enough, caused minimal culturis understood it. But better late than not. We can still improve bullfrog genetic by some ways.
First, don’t spawn male and female bullfrog in one generation, or original from one broodstock. Its ways, A culturis has to has two group of broodstock. They have to know its original, distinguis district, or distinguis provinces, like group A ang group B. Group A is cultivated and spawned in pond A. Group B is cultivated and spawned in pond B.
Both of them will produce male, and female. Male group A may not spawned with female group A. But male group A spawned by female group B, or female group A with male group B. But this way isn’t the best. Because still occur blood relation. So, inbreeding still occur on their.
Second, by spawn male, or female with male and female from distinguish location. For example, until province A with province B. It beter if distance both of province very far. This way better than the first, becauce blood relation farer.
Third, by spawn child with originaly broodstock. For example, son with mother, or daughter with father. It’s named backcross. it’s the best. Because original broodstock still has better genetic, children, still poor. Backcross will carry out of better geneticaly than the first, and the second.
Daftar pustaka :
There are many factor, why genetic decrease. One of them is wrong in using broodstock. Because, minimal in genetic knowledge of culturis, many culturis which not well in using broodstock, by spawn broodstocks in a generation. Spawning in one generation has cause inbreeding, or mixeing blood the both of them.
Like rice has be porridge, bullfrog has decrease. Some excess of bullfrog only a memory. In 1998, me as a writter has discribed a good way for standing quality of bullfrog, but it’s not enough, caused minimal culturis understood it. But better late than not. We can still improve bullfrog genetic by some ways.
First, don’t spawn male and female bullfrog in one generation, or original from one broodstock. Its ways, A culturis has to has two group of broodstock. They have to know its original, distinguis district, or distinguis provinces, like group A ang group B. Group A is cultivated and spawned in pond A. Group B is cultivated and spawned in pond B.
Both of them will produce male, and female. Male group A may not spawned with female group A. But male group A spawned by female group B, or female group A with male group B. But this way isn’t the best. Because still occur blood relation. So, inbreeding still occur on their.
Second, by spawn male, or female with male and female from distinguish location. For example, until province A with province B. It beter if distance both of province very far. This way better than the first, becauce blood relation farer.
Third, by spawn child with originaly broodstock. For example, son with mother, or daughter with father. It’s named backcross. it’s the best. Because original broodstock still has better genetic, children, still poor. Backcross will carry out of better geneticaly than the first, and the second.
Daftar pustaka :
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