Breeding Patterns: Line breeding, Clan mating, Mob breeding. Genetics for Small Farms Part 3

Рет қаралды 3,265

Күн бұрын

Greetings! This is the third in the breeding/genetics for small farms series, and in it we will discuss the details of Line breeding, clan/family/spiral breeding, and mob/random breeding! The discussion is a compare and contrast covering the details of each method, what each does well, and where each fails. This video is intended to provide of survey of the main breeding techniques in common use, but the constraints of time do force simplification, and while this will help you understand and choose the best method for you and your farm, further study will be needed to execute said method properly. Since this is the third instalment and it leans heavily on the fundamentals presented in the first two videos, here is a link to the playlist containing them!
• Animal/Plant Breeding ...
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Citations for the discussion of the soay sheep and white park cattle feral populations (Just a sample, these are well studied populations and there is a lot more than just these few articles!):
Coltman, David W., et al. "Parasite‐mediated selection against Inbred Soay sheep in a free‐living island population." Evolution 53.4 (1999): 1259-1267.
Gulland, F. M. D. (1992). The role of nematode parasites in Soay sheep (Ovis aries L.) mortality during a population crash. Parasitology, 105(3), 493-503.
Hudson, G., Wilson, I., Payne, B. I., Elson, J., Samuels, D. C., Santibanez-Korev, M., ... & Chinnery, P. F. (2012). Unique mitochondrial DNA in highly inbred feral cattle. Mitochondrion, 12(4), 438-440.
Leivesley, J. A., Bussière, L. F., Pemberton, J. M., Pilkington, J. G., Wilson, K., & Hayward, A. D. (2019). Survival costs of reproduction are mediated by parasite infection in wild Soay sheep. Ecology letters, 22(8), 1203-1213.
Milner, J. M., Albon, S. D., Illius, A. W., Pemberton, J. M., & Clutton‐Brock, T. H. (1999). Repeated selection of morphometric traits in the Soay sheep on St Kilda. Journal of Animal Ecology, 68(3), 472-488.
Milner, J. M., Elston, D. A., & Albon, S. D. (1999). Estimating the contributions of population density and climatic fluctuations to interannual variation in survival of Soay sheep. Journal of Animal Ecology, 68(6), 1235-1247.
Sparks, Alexandra M., et al. "The genetic architecture of helminth-specific immune responses in a wild population of Soay sheep (Ovis aries)." PLoS Genetics 15.11 (2019): e1008461.
Visscher, P. M., Smith, D., Hall, S. J., & Williams, J. L. (2001). A viable herd of genetically uniform cattle. Nature, 409(6818), 303-303.
Williams, J. L., Hall, S. J., Del Corvo, M., Ballingall, K. T., Colli, L. I. C. I. A., Ajmone Marsan, P. A. O. L. O., & Biscarini, F. (2016). Inbreeding and purging at the genomic Level: the Chillingham cattle reveal extensive, non‐random SNP heterozygosity. Animal genetics, 47(1), 19-27.
0:00 Intro
3:47 Purebred vs. hybrid
7:45 Test crossing
12:16 Line breeding, explanation
16:06 History of the "cocker's system"
25:40 Genetic burden; test cross within a line
35:27 Clan breeding
52:30 Mob breeding
1:09:13 Up next, outcrossing/hybridisation

Пікірлер: 38

@phakadekhanyile 9 күн бұрын

Great video. Very helpful

@SamuelCiuriuc 2 ай бұрын

Awesome thank you so very much for this information that I been searching for God bless you abundantly thank you

@pseudopetrus Ай бұрын

I agree working about one trait at a time, but with a caveat, I think they all have to be free from defects and in general they need to be decent birds, or with clan mating, the one family drags the next down.

@LuisaLaDona 3 ай бұрын

Absolutely great video thank you for sharing your knowledge fantastic. Muchas gracias

@oldwaysrisingfarm 3 ай бұрын

So glad to be of service!

@dr.reyj.lebaquin9193 3 ай бұрын

More power...thank you for the great lecture

@Jesus-is-the-One-True-God 3 ай бұрын

This helped me out a lot. Thanks for the amazing video.

@oldwaysrisingfarm 3 ай бұрын

You are most welcome!

@RobG7aChattTN 5 ай бұрын

Great video. I’ll need to share this with a few Facebook groups.

@oldwaysrisingfarm 5 ай бұрын

Thats awsome! Thanks so much!

@RobG7aChattTN 5 ай бұрын

@@oldwaysrisingfarm after watching this whole series I’m surprised that you aren’t already on a few of the Facebook pages that I’m on. Several seem right up your alley. My free range birds have a lot of the traits that you are breeding for but guess what? I rarely find their eggs. They roost in the barn but I think the raccoons find most of the eggs in the woods. Maybe if I locked them up half the day more would lay in the barn. I think a lot of those traits keep them half wild.

@oldwaysrisingfarm 5 ай бұрын

@@RobG7aChattTN I have tried; since it is my own youtube page they all kick me off for "self promotion" any time I try and share something, so I just gave up on facebook and left the platform. For some reason people thing there is big money in youtube and money makes people stupid. If you are interested, I will share that after 2 years and 197 videos youtube has provided me exactly 0 dollars! But, most facebook groups still slap me away for trying to promote a business when I try and share information that way. I work a retail job to support this teaching effort, and don't have time to make the videos and then go and re-type all this stuff on a facebook page separately, so I am just done with them.

@RobG7aChattTN 5 ай бұрын

@@oldwaysrisingfarm yeah, I got banned from one of the most popular chicken groups because someone asked if I sold birds and I said, “not yet” and they took that to mean some day I would sell birds so I got blocked because selling birds is not allowed.

@RobG7aChattTN 5 ай бұрын

I had one KZfaq video blow up and it got over a million views so I was allowed to apply for monetization. By the time it was approved views had dropped and I ended up making something like $200. Now I make about 48¢/month but haven’t gotten a check in the last 2 years because it hasn’t reached $100 yet.

@mulamayne5615 Ай бұрын

I dont see the about tab?

@greatcountryliving 5 ай бұрын

Great video! 17:31 cockfighting vs Roman's Colosseum or today's football just humans used for 'entertainment'

@pseudopetrus 7 ай бұрын

I really want to talk about inbreeding which in it's self is not bad. But being a history buff, I have articles of chicken breeders from the early 1900's that advocate strongly for keeping your line pure, no outside blood. But inbreeding is cumulative and the negatives are also cumulative. So in the early days, when many chicken breeds were developed as composites of other breeds, there was much room for inbreeding, but one hundred years later, we have to be so much more careful. It's really not a big deal, I line breed and clan mate to achieve my goals, but you have to be mindful, the biggest thing we see with chickens that are getting too inbred is poor fertility, but one outcross can fix that, but it also can mess up your birds, so your source for outcross stock is very important. Great presentation!

@SamuelCiuriuc 2 ай бұрын

I read your comments is there any books that you can recommend for me a beginner in breeding chickens ? Please thank you I appreciate your help

@pseudopetrus Ай бұрын

@@SamuelCiuriuc Look up Sigrid Van Dort if you are into chickens.

@liesecarey9494 4 күн бұрын

I don't think I really understand the test cross. When you run into a trait you want to select against, how do you know if it is a simple Mendelian trait that you can successfully eliminate in this way?

@oldwaysrisingfarm 3 күн бұрын

@@liesecarey9494 Well, for simple mendelian traits a test cross is a cross between an individual with unknown genotype and one with a known homozygous recessive condition. If the offspring are approximately 50/50 dominant VS. Recessive phenotypes then the unknown parent is recessive, if the unknown parent is homozygous then all offspring will be as well. Then, you use thus information to decide weather or not to cull the parent being tested; all test cross offspring are typically considered culls.

@oldwaysrisingfarm 3 күн бұрын

@@liesecarey9494 Now, knowing of a trait is simple mendelian. The best case senerio is to consult the literature and get an answer. If the trait of interest is not in the literature think it through a little...traits that fall on a sliding scale like size and growth rate are usually pollygenetic, truth that are "either or" are typically mendelian. But these are guidelines with exceptions and you may just have to experiment.

@mulamayne5615 Ай бұрын

Is there anyway i could contact you. I need help if you have the time thanks!

@oldwaysrisingfarm Ай бұрын

Sure, the "about" tab went away in a recent KZfaq "style update" now you look just under the header on the channel homepage and click the bolded "...more" to get the about info. It is "improved" because it is now more confusing...sarcasm intended, lol. If that does not work the channel gmail address is the channel name with no caps or spaces; if I type it here as an email address it will attract spam bots which is why it hides behind a captcha in the about info.

@willwood6285 10 ай бұрын

I have racing pigeons and would love to talk with you about a breeding strategy

@oldwaysrisingfarm 10 ай бұрын

Sure, I have no experience with pigeons specifically, but would be happy to help you sort ideas in a general sence... but it would probably be better to use the email in the "about" tab than the chat box.

@willwood6285 10 ай бұрын

I’m sorry where is the about tab?

@oldwaysrisingfarm 10 ай бұрын

Go the home page of this or any youtube channel, there are a series of tabs just above the list of videos: Home--Videos--Playlists--Community--About--Search. Those are pretty standard, some larger channels can customise them a bit so there is some variation from channel to channel. The channel info and contact emails are found in "about", just before the search icon.

@willwood6285 10 ай бұрын

I’m sorry I’m not very up to date one using KZfaq 🤦🏻‍♂️ I’m not seeing a email address

@oldwaysrisingfarm 10 ай бұрын

@@willwood6285 no worries! I see you got it.

@arlgene1981 7 ай бұрын

Can i buy a book for breeding gamecock

@oldwaysrisingfarm 7 ай бұрын

I don't know of one, my knowledge of it comes from passing mentions in a variety of other references. But, then, I have never specifically tried to find such a book, as my only interest in them comes from wanting to cross some of their physical traits into other docile lines.