I knew I risked many oposing opionions, I like to learn from different views and then ask more questions to further understand. At this point I will just acknowledge that this has resulted in an interesting discussion.
I see a couple of things.
Purebreds-- what defines a purebred? At what point is a line regarded as reproducing itself sufficiently to have set genes that generally remain constant. Inbreeding Coefficient, as presented in cattle and horses, indicates that , at a high level, many problems may start to show up.
I suspect in show dogs ( I only get purebreds because their genetics are set) the focus has not been practical goals in selection. More a fashion statement, and conseqently the look and movement of the dog has out weighed health, intelligence, and the like. With the high volume of chicks, a stricter selection method can be applied. WOuld this account for the diference?Is it likely that old lines have been selected for so long that most genetic quirks have been removed?
In a recent Email, a friend who is suppling me with a few eggs and started birds, felt that of the 2 lines he has, one does not grow as well as the other, and we wondered if it's because this line is 50 years old, or more, and these birds came directly from that breeder. THe second line is a combo of at least 2 lines, and out grows the first line I mentioned. We are planning to mix the lines and probably add a third line.
Your thoughts. Please, all opinions are welcome. I'm not a newbie to genetics, though some of our readers are. I would like to learn.
I see a couple of things.
Purebreds-- what defines a purebred? At what point is a line regarded as reproducing itself sufficiently to have set genes that generally remain constant. Inbreeding Coefficient, as presented in cattle and horses, indicates that , at a high level, many problems may start to show up.
I suspect in show dogs ( I only get purebreds because their genetics are set) the focus has not been practical goals in selection. More a fashion statement, and conseqently the look and movement of the dog has out weighed health, intelligence, and the like. With the high volume of chicks, a stricter selection method can be applied. WOuld this account for the diference?Is it likely that old lines have been selected for so long that most genetic quirks have been removed?
In a recent Email, a friend who is suppling me with a few eggs and started birds, felt that of the 2 lines he has, one does not grow as well as the other, and we wondered if it's because this line is 50 years old, or more, and these birds came directly from that breeder. THe second line is a combo of at least 2 lines, and out grows the first line I mentioned. We are planning to mix the lines and probably add a third line.
Your thoughts. Please, all opinions are welcome. I'm not a newbie to genetics, though some of our readers are. I would like to learn.
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