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Selecting substitutions

  
 
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 08/11/2002
Engormix.com
Argentina
Selecting substitutions
through this means he/she wanted to know why some porcicultores recommends not to make selection of substitution females that have been born in the first childbirth.
I wait answers and ahead of time thank you. Greetings
 10/11/2002
THIN ALFREDO
Peru
I Have understood that the first litter is not numerous and he/she has a lot of variation in the weight of the pigs, also that the first litter is not genuine expression of the genetic bagage, while in multíparas litters this is attributable to genetic factor in great measure, the litter is but numerous and as much as but numerous it is, the election of our substitution has the high probability of taking to the best elements, projecting a good future for the upbringing.
Except for better approach. Luck
 27/07/2006
NUMA GONZALEZ
Venezuela
Dear porcicultores:
The genetics doesn't depend on the number of the childbirth where a female or male has been born.
Yes, you can select females coming from the first litter, taking into account that this is numerous.
There are proven evidences that a sow that has a number of having been born high in their first childbirth, it will always be good, under conditions of good handling.
The weight to the birth depends on many factors, for it is not used it as selection parameter in none of the big companies of swinish genetics of the world.
So the answer is: if you can.

 28/07/2006
andres sandoval
Colombia
The weight to the birth will always be directly related with the size of the litter, among bigger the litter, minor will be the weight average of those born alive.
The curve of producitividad of a sow arrives to its maximum point between the third and quarter childbirth, I think they would be the ideal moments to make selection of substitutions.
Greetings,

Andrés
Closed Discussion
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