pic symposium 2011 | nashville, tn selection for lifetime production

PIC Symposium 2011 | Nashville, TN

Selection for Lifetime Production


Complexity of Lifetime Production

Number Born AliveTotal BornStillborn %

PreWeaning ThroughputPiglet Survival - SowPiglet Survival - PigletBirth WeightWeaning WeightTeat NumberDefects

Litters / Sow / YearWean-to-Effective Service IntervalGestation LengthLactation Length

Lifetime EfficiencyAge at Effective MatingSow MortalityInvoluntary Culling / StructureFeed Utilization


Process of Genetic Improvement

• Detailed and meaningful data capture

• Accurate prediction of genetic merit

• Meaningful selection objectives and targets


Data Sources

MULTIPLICATION

COMMERCIAL Breeding stock

GN

COMMERCIAL CROSS BRED SLAUGHTER PIGS

CBVsand selection

decisions

PICTraqDatabase

GN Progeny Performance Data

Commercial Sow Performance Data

Commercial Progeny Performance Data

EBVs

SIRE LINE

DAM LINE


Dam Line Programs

April 2011


Purebred and Crossbred Sows Contributing to Genetic Evaluation

0

20,000

40,000

60,000

80,000

100,000

120,000

L02 and L03 GGP Sows

L02 Sows

L03 Sows

43000

44000

45000

46000

47000

48000

49000

Pedigreed Crossbred Sows


GNX FIRE TestImplemented in May 2010

Enhanced Differentiation

• Pedigreed commmercial pigs– Terminal– Maternal

• Heavy slaughter weights– Approximately 290 lbs.

• Low energy, pelleted diets


Prediction of Genetic Merit

• Basic principle…– Resemblance between relatives

• Meaningful data• Accurate pedigree

• Historically, we have utilized data flows combined with pedigree and small amounts of genomic information for prediction of genetic merit (i.e. EBV’s, index values, etc.)


Genomic Selection

Initial Implementation of New Era of Genetic Technologies

Scrotal Hernia

Finisher Mortality

Total Born


What’s Next?Single Step Genomic Evaluation

Information extracted from the DNA can be used mainly in two ways:

Genetic markers: estimate the effect of each SNP on each trait.

Genomic relationships: estimate the actual fraction of genes identical by descendent


How many identical genes 2 pigs share?Resemblance Between Relatives

Based on pedigree, we assume it’s 50% between ALL full-siblings

EBV EBV EBV EBV


How many identical genes 2 pigs share?Resemblance Between Relatives

Based on pedigree, we assume it’s 50% between ALL full-siblingsGenomic Information shows it is between 40 and 60%

EBV EBV EBV EBV


Single Step Genomic EvaluationWhere’s the Benefit?

• Instead of assuming relationships based only pedigrees we define relationship on pedigree + DNA,

• Therefore for every animal and every trait our genetic evaluation is improved…– Constantly linking newest phenotypic data with– Pedigree information augmented by DNA

• Delivering a significant cumulative gain in accuracy of selection.


Single Step Genomic EvaluationIncreasing Rate of Genetic Gain

TRAIT ACC EBV ACC GEBV increase

Total Number Born 0.36 0.40 11%

Stillborn % 0.28 0.33 18%

Litter weaning weight 0.16 0.20 25%

Interval weaning - mate 0.11 0.14 27%

Survival birth - weaning 0.29 0.34 17%


Genetic Differentiation = Profitability Enhancement

• If selection objectives and intensity are aligned and focused, PIC differentiation in the sow farm should be delivered via delivery of high quality weaned pigs at the lowest possible cost…– Maximum efficiency per litter– Maximum efficiency of inventory– Maximum efficiency in utilization of inputs


PIC Commercial Female Performance


Lifetime Production and EfficiencyTargeting and Delivering the Key Drivers

Number Born AliveTotal BornStillborn %

PreWeaning ThroughputPiglet Survival - SowPiglet Survival - PigletBirth WeightWeaning WeightTeat NumberDefects

Litters / Sow / YearWean-to-Effective Service IntervalGestation LengthLactation Length

Lifetime EfficiencyAge at Effective MatingSow MortalityInvoluntary Culling / StructureFeed Utilization

Data currently captured in PIC genetic improvement program


Camborough Potential


Example of Lifetime Performance


Sow #4421

Parity 1– 114 days gestation– P1 18TB 16BA

140 Days to Parity 2– 19TB 19BA



140 days to Parity 5– 17TB 17BA

144 days to Parity 6– 26TB 26BA…25 weaned

Lifetime Performance (so far)• 820 days of herd life• 120 pigs Born• 116 Pigs Born Alive

• 0.146 pigs TB per day in farm• 0.141 pigs BA per day in farm

53.3 pigs TB/sow/yr51.1 pigs BA/sow/yr

pic symposium 2011 | nashville, tn selection for lifetime production

Documents

tnpic symposium

targets pic symposium

descendent pic symposium

pelleted diets pic symposium

genetic markers

accuracy of selection

optimum selection

major genes selection