KNERSIE":304o9xne said:
DOC HARRIS":304o9xne said:
Jeanne- I agree with you about the positioning of cattle. That is why is stressed "IN THIS PICTURE". And this is why I repeat that 'pictures' are a terrible way to attempt to assess what an animal really is like, and the faults they possess. It is not 'fair' to the owner, it is not fair to the Judge, and it sure isn't fair to the animal! By the same token - there are animals that a picture taken with an old Brownie Reflex camera of 1940 couldn't look any better if it were taken with a 2007 Kodak Electronic Digital 50+ Zoom Video Cam! At least, with the 2007 Video, we could see all of the faults more clearly!
Your calves are knockouts! Don't loose those Genetics! Just for the "Halibut", do a flush of the dam(s) and do some line-breeding with a couple of recipients. (Sire to daughter - Son to dam). You won't lose much, and you may GAIN a total Genetic Explosion. That is the way the Angus Eileenmere's were developed - - all the way up to Dynamo and beyond. Just don't overdo a good thing. Some people can't stand prosperity!
DOC HARRIS
Doc,
I have a linebreeding question for you.
In the start of a linebreeding program, would you be as agressive as you stated, by breeding sire to daughter - son to dam, or would it be better to stay more conservative and breed half brother to halfsister for a few generations to weed out more genetic trash before breeding closer? Or stick to the halfsib matings and never go over the natural 50% influence form a single parent?
KNERSIE-
To answer your question in a word - yes, I would be as aggressive as I stated. Having said that, now we come to what could be a long and very complicated discussion of the intricacies of maximizing genetic influences of our beef cattle friends through
INTELLIGENT mating techniques. As with any controversial subject, determining and defining the rhetoric is paramount to the reasonable give-and-take of ideas.
I am sure that a majority of breeders have a workable knowledge of genetics. They have to have in order to really know what they are attempting to do with their beef programs. But to get specific with the exactness of the terms involved in the breeding of their beef cattle, there seems to be a great deal of misunderstanding as to just what some of the terms mean. This could take a long, long time to delve into a Genetics class just for a "Glossary of Terms". For our purposes in this discussion, we should consider four phases of mating plans. They are Inbreeding, Linebreeding, Closebreeding and Crossbreeding, and here are some short definitions to stabilize our thinking:
Inbreeding- Continual mating of individuals of the same or closely related genetics.
Linebreeding- The most conservative form in Inbreeding.
Closebreeding- A breeding system which uses EXTREME inbreeding, such as mating between siblings or between parents and offspring.
Crossbreeding- mating of individuals from DIFFERENT breeds.
In my suggestion to do some linebreeding with Jeanne's calves, you will note that I included flushing the dams of the calves, implanting in a "couple" of recipients the "son to daughter and sire to dam" protocol just to see what would result. It is the quickest way in the cattle breeding business to get responses (not like mice or rabbits!), and you are not loosing a lot of time. By following your suggestion, KNERSIE, breeding half siblings for a. . . "few generations to weed out the genetic trash before breeding closer", that would take in the vicinity of nine to fifteen years of culling and watching. Good idea, but very time-consuming in a breeder's lifetime.
Linebreeding, being conservative, is usually associated with slower improvement and limited risk of producing undesirable individuals. It does not emphasize
continuous sire-daughter, dam-son, or brother-sister matings. That is the key to conservative linebreeding. The main purpose of LINEbreeding is to transmit a large percentage of one outstanding ancestor's genes from generation to generation without causing an increase in the frequency of undesirable traits often associated with INbreeding.
All of these various mating protocols can be overdone, resulting in a complete 'crash' of the intent of the plans in the first place. I will stand on the principles I have held in past discussions - MODERATION IN ALL THINGS! But to "stick to the half-sib matings and never go over the 50% influence of the single parent" results in NOT making much genetic progress.
It should go without saying that any breeding method demands RIGOROUS CULLING! And linebreeding justifies that obligation.
I didn't intend for this answer to be this involved, but Genetics and it's correct management IS complicated and involved. I will come back with another post including a "Line Breeding Chart" that I think will explain a lot of the particulars of what Linebreeding is and how it is accomplished.
DOC HARRIS
HERE is the web site for the "Line Breeding Chart. It refers to rabbits, but the principles are the same for Cattle. I would suggest that you copy it and mark out the "F" Generations (1, 2, 3, 4, etc) and substitute your own Ranch genetics in their places to see how a plan for you might work!
http://www.geocities.com/pamnock/LineBreedingChart.html
DOC