AUSTRALIAN POULTRY FORUM™

The Biggest Poultry Forum in the world
It is Tue Mar 19, 2024 7:48 pm

All times are UTC + 10 hours




Post new topic Reply to topic  [ 34 posts ]  Go to page Previous  1, 2, 3, 4  Next
Author Message
 Post subject: Re: simplest method of Linebreeding
PostPosted: Sat Nov 26, 2011 10:03 pm 
Offline
 
 

Joined: Sat Dec 18, 2010 10:13 am
Posts: 1613
Location: NE. Melb.
How many birds and how many pens would you need to breed a line by this method? What numbers would you need to keep to make useful comparisons between chicks and then to make your selections and culls?

_________________
2 Australorps, 1 Lohman, 2 Silkies, 1 Bantam Wyandotte, 2 Plymouths, 4 Barnevelders & a pear tree in a partridge.


Top
 Profile E-mail  
 
 Post subject: Re: simplest method of Linebreeding
PostPosted: Wed Nov 30, 2011 8:50 am 
Offline
 
 

Joined: Tue Nov 29, 2011 6:49 am
Posts: 4
Wow this is really good I new I had to line breed and even inbreed but was not sure of the order in which to do it so thanks heaps pa.

wickedwings from how I read it its 3 and 1 outcross to start or 6 and 2 outcrosses if you want to go bigger.


Top
 Profile  
 
 Post subject: Re: simplest method of Linebreeding
PostPosted: Wed Nov 30, 2011 11:35 am 
Offline
 
 

Joined: Sat Dec 18, 2010 10:13 am
Posts: 1613
Location: NE. Melb.
When you say 3 and 1 outcross, do you mean 3 generations of linebreeding and then 1 outcross or starting with 3 hens and 1 cock? I can follow what the sequence of matings is, no worries, what I'm wondering is how big a flock do you need to maintain a breeding line. What's a safe, comfortable number of birds to guard against most accidents and how do you go about seperating and housing them to ensure you don't muck up your breeding program. Can you just let them all mingle for most of the year and then seperate them just before you want to start hatching eggs?

_________________
2 Australorps, 1 Lohman, 2 Silkies, 1 Bantam Wyandotte, 2 Plymouths, 4 Barnevelders & a pear tree in a partridge.


Top
 Profile E-mail  
 
 Post subject: Re: simplest method of Linebreeding
PostPosted: Tue Dec 13, 2011 8:20 am 
Offline
 
 

Joined: Sat Dec 18, 2010 10:13 am
Posts: 1613
Location: NE. Melb.
Would anyone who keeps their own lines care to venture an opinion on the minimum size of an operation like this? I'm wondering if this can be achieved on a backyard scale or if you really need some property.

_________________
2 Australorps, 1 Lohman, 2 Silkies, 1 Bantam Wyandotte, 2 Plymouths, 4 Barnevelders & a pear tree in a partridge.


Top
 Profile E-mail  
 
 Post subject: Re: simplest method of Linebreeding
PostPosted: Tue Dec 13, 2011 9:16 am 
Offline
 
 
User avatar

Joined: Mon Jun 06, 2011 7:47 am
Posts: 2176
Location: The Shire
wickedwings wrote:
Would anyone who keeps their own lines care to venture an opinion on the minimum size of an operation like this? I'm wondering if this can be achieved on a backyard scale or if you really need some property.


No breeding program but I shall put forward these questions to you:

1. How big is your suburban backyard block?

2. What are your council/shire's regulations in regards to farm animals/poultry?
Will the neighbour's raise any objections, as you will have to ask for their permission when applying for a planning permit/farm animal permit if you go over your quota?

3. How will your wife react to the expansion of your poultry obessession sidesplit.gif

_________________
"There comes a time in your life when you have to let go of all the pointless drama and the people who create it and surround yourself with people who make you laugh so hard that you forget the bad and focus solely on the good. After all life is too short to be anything but happy."
Karl Marx, Composer


Top
 Profile  
 
 Post subject: Re: simplest method of Linebreeding
PostPosted: Tue Dec 13, 2011 10:38 am 
Offline
 
 

Joined: Sat Dec 18, 2010 10:13 am
Posts: 1613
Location: NE. Melb.
Only a modest backyard, under 600 sq.m for the block, on the edges of suburbia.

Council regs allow up to 24 poultry. They don't specifically ban roosters but I imagine they might possibly come under noise restrictions. Sod the neighbours, they complain too much. Actually they're are pretty good about it so far. :-D

Mrs. ww likes the idea if we keep some of the Plymouths.

_________________
2 Australorps, 1 Lohman, 2 Silkies, 1 Bantam Wyandotte, 2 Plymouths, 4 Barnevelders & a pear tree in a partridge.


Top
 Profile E-mail  
 
 Post subject: Re: simplest method of Linebreeding
PostPosted: Sat Sep 22, 2012 4:31 pm 
Offline
 
 

Joined: Sat Sep 22, 2012 12:38 am
Posts: 1
I like the simple method peacocks aust good of you to share that and its my new project using it


Top
 Profile  
 
 Post subject: Re: simplest method of Linebreeding
PostPosted: Fri Nov 02, 2012 10:07 pm 
Offline
 
 

Joined: Fri Nov 02, 2012 8:55 pm
Posts: 1
So well explained and even I can follow thank you I have wanted to know the way to proceed with the line breeding


Top
 Profile  
 
 Post subject: Re: simplest method of Linebreeding
PostPosted: Wed Nov 28, 2012 9:11 am 
Offline
 
 

Joined: Mon Jan 02, 2012 5:40 am
Posts: 20
Chickens probably do not line breed very well.

They have about twice the genetic load as other animals like humans. The genetic load is just a measure of the lethal equivalents in a genome. Humans have one of about 2.5. This just means you have the equivalent of about 5 recessive lethal genes in your genome. This is why brothers and sisters should not mate because they share half their genetic loads and recessive lethals or detrimental genes can be expressed in the progeny of inbred matings.

Chickens have a genetic load of around 6. Nearly all inbred lines generated by full sib (Brother/Sister) matings fail after just three full sib matings. Once the inbreeding coefficient goes over 0.375 the lines tend to fail to reproduce one male and one female to continue the line.

So inbreeding in chickens is not a very good thing to do a lot of if you are un-aware of the downside.

The reason people like to line breed is that it is the fastest way to select for type that is caused by a complex interaction of genes. If you have a superior animal the fastest way to increase the frequency of the superior genes in your line is to line breed.

Line breeding is just when you take the superior parent (hen or rooster) and cross the progeny back to the parent (father to daughter or mother to son). You then take the superior parent and again cross it to its new offspring from the inbred mating. You repeat this until infertility becomes a problem or the parent dies.

You can select other progeny that presumably will be better than average for your flock to breed in non inbred matings or to other close relatives to try and set the good traits in your line.

The reason that this works is that in the first mating the progeny have only half the sires genes. We say that the inbreeding coefficient (F) is 0 because none of the non inbred progeny can have both the alleles from the sire. When the sire is crossed to his daughter F = 0.25 this means that 25% of the genes of the progeny are identical by descent (both alleles of a gene come from the sire) and 75% of the total genome comes from the superior parent. These first generation inbred progeny have been fixed for 25% of the sires genes. With the next inbred mating of sire to grand daughter F = 0.375 and 87.5% of the total genome. Mating to his great grand daughter F = 0.438 and 93.8% of the total genome comes from the superior sire. After this inbred mating the gain is much less (the next inbred mating results in F = 4.69 and 96.9% of the total genome) and the birds are getting pretty old, so you can pick the best son and start it over again.

Line breeding can produce very rapid gains in the quality of your line for certain traits, but nearly always results in a degeneration of the reproductive capacity of your line and you end up outcrossing and starting over. For a few generations it can give you some outstanding birds at a higher frequency than you would get by not inbreeding, but there is no such thing as a free lunch. This is why commercial breeding companies try to avoid inbreeding and concentrate on improving the whole population. The gains are not as dramatic, but they don't fall on their faces as often.

I don't know what the best breeding scheme is. You should do a little inbreeding but not a whole lot and if you inbreed I'd recommend parent to offspring inbreeding because all the genes that become homozygous by descent come from the superior parent. If you brother sister inbreed you get about the same amount of inbreeding (0.25, 0.375, 0.5, 0.594, 0.672.) for the first few generations, but the genes that become homozygous by descent come from the superior parent and the inferior parent. So if you brother-sister mate you are not only fixing genes from the good parent, but from the not so good parent too.

Maybe the best advice is that if you inbreed always use a superior animal for the mating. If you do not you are just increasing the bad genes in your line.

Any mating between related individuals is inbreeding. Line breeding and full sib mating cause the same amount of inbreeding for the first two inbred generations. Theoretically line breeding and full sib matings should have the same detrimental results for the first two inbred generations. Full-sib mating would be more detrimental for the 3rd and subsequent inbred generations.

The difference is that all the inbreeding comes from the superior parent in line breeding, but half the inbreeding comes from the inferior parent in full-sib matings. This is why I'd recommend inbred matings involving only birds that you think are good enough to warrent it.

I have line bred for years and thats the only way to produce better birds.

http://www.castlefarmeggs.co.uk

_________________
http://www.Castlefarmeggs.co.uk. Home of the Welsh Black Fowl. https://www.facebook.com/pages/Utility- ... 1570247281


Top
 Profile  
 
 Post subject: Re: simplest method of Linebreeding
PostPosted: Thu Jun 27, 2013 9:06 pm 
Offline
 
 

Joined: Tue Jan 17, 2012 11:12 am
Posts: 1194
I have just just to read all the posts in this topic and I am just confused conf665 , so I'm going to try and ask a question in a way that is related to me and my circumstance....so hopefully someone can answer me so I can understand....so please go slow for the novice as I am only gathering info at this stage :-D

I have two babies (Aracuana's) at the moment (Lolly & Pickle). I think Lolly might be a boy & Pickle a girl, and I believe they may be from the same father but different mother. So, my questions are:

1) would it be okay to breed them together

2) if I do breed them together do I then breed mother over son & father over daughter

3) what does 1/2 & 1/2 and 3/4 & 1/4 mean?, as that really got me confused

4)
wickedwings wrote:
When you say 3 and 1 outcross, do you mean 3 generations of linebreeding and then 1 outcross or starting with 3 hens and 1 cock? I can follow what the sequence of matings is, no worries, what I'm wondering is how big a flock do you need to maintain a breeding line. What's a safe, comfortable number of birds to guard against most accidents and how do you go about seperating and housing them to ensure you don't muck up your breeding program. Can you just let them all mingle for most of the year and then seperate them just before you want to start hatching eggs?
no one answered WW's question, which I think is a valid question as this whole "outcross" things is also confusing "breeder" jargon. I need it dumbed down :shock:

Anyone willing to dumb it down for a curious novice :?: :?: :?:

If anyone can help answer my questions above then it would be very deeply appreciated. :-D
wave.gif
Cheers
Chicka-Dee


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 34 posts ]  Go to page Previous  1, 2, 3, 4  Next

All times are UTC + 10 hours


Who is on the Forum

Users browsing this forum: 10Geese, 70%cocoa, ABC Poultry, Adam Smith, Adeiela, Akeet, Alex Cooper, alexanderpeafowl, AlligatorCrkHeritageBreed, Amature Chookz, andrewschooks, Appleton Australorps, arvoducks, Ash Maree, auctioneer, Avi Rare Breeds, Ayam Cemani, Backyard Chicken Chat, Backyard fowl, BaliDuckz, Bantam Rhode Island Red, Bantamenance, Barnywood, beakybird, bearfred, BeatenEgg, Beaudesert Mandarins, Ben Newton, benalla park, Bendigo Poultry, BigDucksOz, BigQuackers, birds101, Birds4u, birdsrock, blackdotte, blackleghorn, BlackSwan, Blackswan1, Blue Australorps, bluefirelady, Bob Brookes, BokBok2, Boolaroo, Booths Bantams, Boxwood, Brad M, brerrabbit, BriansPeas, broken bird, BROOKES POULTRY, BT Homestead, Buff Pekins, Buggsy, BushPig, ButtercupBreedGroup, BYC, byhookorchook, Cackles, caladenia, Caladenia Cottage, Calum H, Cammo Qld, CamsBantams, Carawatha Chickens, Cashmere, castaway chicken, cc's poultry, Charmhaven Chooks, Cheesman Chooks, chicken-boy, Chicken07, chickenlittle, Chickens Mad, Chickhorn, Chook Lady, chookasaurus, chookgirl, chookiebum, ChookieG, ChookMamma, ChookMum, Chooks Galore, Chooks R Us, chookslife, chookyinoz, Christine Shaw, Chukar, Cliff Wyandotte Bantams, CluckyDeb, coastalchookies, Colac Sussex, ColacWaterfowl, Collector Peafowl, Connor Peafowl, cookie, Cordelia, Country Bird, CountryChookz, Cowhide, CrackerChook, Crash, Daggy Guineas, Daniel Lawton, Danny, Danny Brown, darrssy, daviburn, Deb Thomas, debbilee, Denis, Desborough Birds, Dianne Carter, DillDale, Dodds Birds, DragonsDen, Dreaming Guineas, duckyfromoz, Duckz44, Eason Chooks, Eat Chooks, Ecovald, eggnog, EggSellent, eggy, eugenia, Fancychooklady, Farmer Benji, Feathers01, Flash, FlockPheasants, fluff fur & feathers, FluffyBum Silkies, FowlMan, Fraggle, Fraser Island, FrogLeap, Furze Chooks, Gaggle of Geese, Gamebreeder, GavinGoose, geckodan, Ginny, girlfriday, Glen Fowler, Gold Laced Wyandotte, Golden Pond, Goodwin Ducks, Goulburn Heritage Poultry, grabby, GreenWest, Greg Davies, GUINEA FOWL, guinea fowl galore, Guinea owner, guineafowl, GuineaHomer, Haggis, HAPPYHENS, Hardfeather, Hawkes, heggie, Heidi F, Heijo, Helenchooks, Henny Penny, HillbillyGirlWA, Ian B, infoaddict, Isa Brown, Isachooks, Island Fowl, Ivan J, J Hicks, jaffa, Jane Stewart, Janelle Marshall, Jane's Chooks, jap jumbo quails, jarryd, Jeff Duncan, Jen71, Jersey Giant, Jimboomba Poultry, John Cole, John Pike, johnstoneparksussex, JonksGuineas, jose, Josh Welsummers, jr, JRA, Judith King, Judy Appleton, Julie Hart, Kalimna Heritage Poultry, kardella poultry, Karlisa, Katy, KAZZA64, KellyP, KEMPSEY NAKED NECKS, Ken Johnstone, kezabel, Khaki_Ducks, Kin Kin Silkies, Kingscote Chickens, klw, konopiste, KoopKing, kowie, KT, kyall3, LadyAmherst21, lanceview, Lawnton Poultry, Lesley Thomson, Leslie Cooper, Lilly, Linda P, Linz, Lozzy, LozzyR, LueT, luvmychook, madrex, MamasPyjamas, Mannie, Marengo Heritage Poultry, Margret Young, MaryJ, MaryJanet, Matt Knight, MattsGuineas, Mcginniss Fowl, meander, Melanie Y, MemoryLane, Milo, MinistryofDucks, Minorca&AndalusianStud, MinorcaCoop, mitchell07, MitchesMarans, Monique, Monto Poultry, MrPeabody, Mrpeewee, Ms Frankie, mummaroo, mycoola, Myflockoblues, mysticviews, NanangoGuineaBoy, NellyG, NEP, NepeanBirds, New England Watefowl, NightMare, Noel Cox, NSW King Quails, NZ Pekin Queen, Oaklands, Oldmanrooster, Olivia N, ONE TREE HILL, Ozchook, ozflock, ozguineafowl, ozibirds, O'Connor Sumatras, P_Edwards, Pam, Peafowland, peamad, pearcey, PeepGuineafowl, Perth Pigeons, perthchooks, Peter Mead, Phil Thomas, PHILL, Pitts_Poultry, pj hatchery, Podgie, PossumCorner, Poulsen, Poultry, Poultry Hoarder, Poultry Matters, Poultry mum, Poultry Rare Breeds, poultrynut, PrestigePeafowl, Pretty boy, Priens Fowl, prorooster, Prouten, QuailFarmer, QuailQueenGC, QuailTales, Quailz, Quamby Chickens, Rainbow Chickens, Rawlinson, realimagery, redeyekeet, redjohanna, Reeves Family, Rhiannan H, Rhode Red, Ricky Bobby, RJJ Fowl, Rob Smith, Rod Taylor, Roger Parkin, rollyard, Roma Runners, Rose, Roundyard, ruff, rwood, SantaClaws, Scots Grey Stud, seeing_spots, shairlyn, Sharni N, shayne, Shelly Roberts, silver duckwing game, Smallflock, snowball, South Aust Rouen Ducks, SouthernDucks, SouthSussex, Sparky, splash laced Wyandotte, springcreek, Stark Waterfowls, Stelan, Stephen Richards, Steve Davies, Stuart Turner, Sue Clarke, Sue Hall, Sue Sheppard, Sue Wards, sue55, sunrise, Sussex19, swiftwood pheasants, SwineoSam, SydneyOEG, T.A.S.S™ [Bot], TANYA, TazBarnies, The Barnyard, The Browns, The Chook Man, The Good Life, The Gotfeather, TheChookBlock, Toolern Vale Fowl, Trany Naked Neck, Tribe of Honk, Tropic Poultry, Trott Park, Trout Runner, Turkey Man, Vella Layer Hens, Vicki Joy, Victorian Waterfowl, Violet Town, W Brown, warmblood, Webbs Orpingtons, WendyT, white modern game, Whittlesea Poultry, whittls, wildman, winglet, Wombatbird, Wonderful Silkies, Wongarra Poultry, Wood Duck, WotTheFlock, Yvette and 5679627 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  

A.P.F - Australian Poultry Forum TM 1566349 all rights reserved 2002 - 2024

APF supports

Stop Forum Spam