Rapid improvement

Rapid Improvement

The production results for the DanAvl breeding herds and central test station appear from the tables below.

 

Breeding herds - average production results for boars 2014-2015

Breed

Number of boars

Daily gain, g/day

Lean meat, %

Conformation, points

0-30 kg

30-100 kg

Duroc

6,152

394

1,140

61.2

2.91

Landrace

13,873

377

1035

62.3

3.00

Yorkshire

14,596

360

986

61.8

3.09

Total

34,621

 

 

 

 

 

Breeding herds - average production results for females 2014-2015

Breed

Number of Females

Daily gain, g/day

Lean meat, %

Conformation, points

0-30 kg

30-100 kg

Duroc

8,312

399

1.082

61.5

3.00

Landrace

17,809

380

968

62.9

3.09

Yorkshire

18,403

363

949

61.6

3.15

Total

44,524

 

 

 

 



Index Calculation

All data from the breeding and multiplier herds combined with all the other data recorded by the owner are sent to the database of DanAvl. Every Thursday evening a new index calculation will be automatically carried out in the central computer. Consequently, each Friday morning a new index for all animals in the breeding programme will be available.

The calculations are made by a UNIX computer using the PEST programme developed by E. Groeneveld.

The BLUP method is used for index calculations:

1. All relatives contribute to the estimation of the breeding values for each individual.
2. Simultaneous correction for fixed effects and estimation of breeding values.
3. Breeding animals from different generations can be accurately compared.

A reliable multi-trait animal model is developed on the basis of well-founded assessments of genetic correlations and heritabilities so that known correlations between the various traits of the breeding goal are used. This is very important when a trait is measured on a few animals, such as feed conversion, which is only measured at the test station.

When computing the breeding values the results are obtained using the following model:

Y = S + K + a + l + p +e
where:

S   is the effect of section (contemporary group)
K   is effect of sex
a    is the BREEDING VALUE
l     is the effect of litter
p    is the effect of pen
e    is residual.

In the DanAvl breeding programme 90-95 percent of the sows are artifically inseminated. By means of AI and the station test, genetic relationships are created between the breeding stock in different herds. This genetic relationship allows the efficient use of the multi-trait BLUP method.


Genetic Trend
The purpose of breeding is to create a genetic improvement for the traits that are part of the breeding goal. The table below shows the annual average genetic improvement for all four breeds achieved during the last four years.

Annual breeding progress 2011- 2014

 

 

 

Breed

Daily gain 0-30 kg,

g/ day

Daily gain 30-100 kg, g/ day

FCR,

kg/ kg gain

Lean meat %

LP 5, no.

Conformation,

points

Slaughter loss, %

Longevity, %

 

Duroc

4.0

20.6

-0.048

0.15

-

0.04

-0.04

-

Landrace

0.1

10.5

-0.031

0.05

0.16

0.05

-0.08

-0.01

Yorkshire

1.1

12.1

-0.027

0.03

0.21

0.05

0.02

0.02

Average,

3breeds

2.3

16.0

-0.039

0.10

0.19

0.04

-0.03

0.006

 *LP5: Live piglets at day 5 after farrowing. Included in the breeding goal of the dam lines only.

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