TH breeding

[Happy12345]

Does TH get double bred often in clubby herds and how does TH affect the way you flush? I was just wondering if rolling the dice on a double dirty flush would be beneficial or if that's something to always avoid.

 

[buckeye]

I personally would never flush a TH carrier to a TH carrier bull

 

[knabe]

I personally would never flush a TH carrier to a TH carrier bull

with in vitro fertilization, sexed semen and embryo screening, you might.

 

[buckeye]

Can they control that an embryo will not get a THC gene from each parent? If that's what you are saying then yes I would do this.

 

[knabe]

Can they control that an embryo will not get a THC gene from each parent? If that's what you are saying then yes I would do this.

not unless they use the new gene editing technique called CRISPR.


http://www.news-medical.net/news/20140331/New-gene-editing-system-holds-potential-for-treating-many-genetic-disorders.aspx


screening embryo's just means that after one generates a bunch of embryo's, PCR is used to sample a few cells from the bundle to determine which embryo's have what status, affected, carrier, or free.

 

[buckeye]

Thanks for the info

 

[jbzdad]

Remember if the goal is to have TH carriers (heterozygous, Tt,) there are just as many of those breeding clean to dirty as when breeding dirty to dirty

I can explain if you need me to

 

[RankeCattleCo]

Punnett Square basics

 

[ZNT]

Remember if the goal is to have TH carriers (heterozygous, Tt,) there are just as many of those breeding clean to dirty as when breeding dirty to dirty

I can explain if you need me to

Actually, you will have 2/3 of your live calf crop as TH carriers if you breed carrier on carrier.  That is because 1/4 of the calf crop will be dead.  Not sure if I would sign up for a 25% mortality rate right off the bat.  Some think it's worth it though I guess.

 

[RankeCattleCo]

Okay I'm not 100% positive and biology is a year removed so I'm kinda rusty:

Tt bred to Tt (both heterozygous carriers)

      T    t

T  TT  Tt

t    Tt  tt

TT-dead (25%)
Tt-carrier (50%)
tt-free (25%)

 

[Happy12345]

Buckeye- I was asking under its normal environment. How would sex semen change the probability of being a carrier?

 

[RankeCattleCo]

Buckeye- I was asking under its normal environment. How would sex semen change the probability of being a carrier?

Absolutely none whatsoever

 

[HerefordGuy]

Just posted on another post, before I read this thread. Glad to see people are realizing they would loose 25% of calf crop from breeding carrier to carrier. Lots of great answers here!