selection in small populations Croatian case Z. Ivki, M. Drai, Z. - - PowerPoint PPT Presentation

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selection in small populations Croatian case Z. Ivki, M. Drai, Z. - - PowerPoint PPT Presentation

Apr 10, 2024 225 likes •448 views

Implementation of genomic selection in small populations Croatian case Z. Ivki, M. Drai, Z. Bara, M. pehar Speaker: Marija Spehar Implementation of genomic selection in small populations - Croatian case Marija pehar, Zdenko

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SLIDE 1

Implementation of genomic selection in small populations – Croatian case

  • Z. Ivkić, M. Dražić, Z. Barać, M. Špehar

Speaker: Marija Spehar

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SLIDE 2

Implementation of genomic selection in small populations - Croatian case

Marija Špehar, Zdenko Ivkić, Maja Dražić, Zdravko Barać

Croatian Agricultural Agency, http://www.hpa.hr/

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SLIDE 3

Structure

  • f

Croatian cattle population

Simmental; 62.8 Holstein; 24.3 Brown Swiss; 2.8 Crossbreeds; 5.6 Other; 4.3

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SLIDE 4

Figures and milk recording cows in Croatia

Year Number of cows

20000 40000 60000 80000 100000 120000 2010 2011 2012 2013 2014 2015 2016

  • Cattle population – 462,000
  • All cows – 168,000
  • Dairy and dual purpose cows –151,000
  • Milk recorded cows – 93,000
  • Herds in milk recording – 5,000 (avg. 19)
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SLIDE 5

Past – present – future

  • Transition period – lack of powerful

breeding organizations

  • Limitation factors

– Use of average bulls - do not provide expected genetic gain – Huge import of heifers – Small number of tested bulls from the national breeding program

  • Revitalization - genomic selection (GS)
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SLIDE 6

GS in Simmental breed

  • German-Austrian genomic evaluation

system

  • July 2013
  • Close relation to Austrian and Bavarian

breeding

– Bull’s sires – Long-standing import of breeding heifers – Bull’s semen for artificial insemination (AI)

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SLIDE 7

Goals of GS

  • To maintain and improve production of

semen from domestic young bulls

  • Genomically tested young bulls
  • Future perspectives - potential bulls

dams

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SLIDE 8

GS in Holstein breed

  • German Holstein genomic selection

system

  • March 2016
  • Long-standing import of breeding heifers
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SLIDE 9

Goals of GS

  • Produce young females to

– Reduce import of breeding animals – Produce own replacement heifers – Ensure market of female breeding material

  • Perspectives

– Intergenomics for small populations (IgHOL)

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SLIDE 10

(Pre) Selection criteria

  • Young male and female candidates

(from Croatian population)

– Progenies of the genomically and progeny tested sires – Pedigree (interesting lines) – Parent average – Dam exterior

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SLIDE 11

No of genotyped calves

Year M F All 2013 19 19 2014 85 5 90 2015 61 6 67 2016 40 3 43 2017 35 35 All 240 14 254 Year F 2016 72 2017 24 All 96

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SLIDE 12

Partners

  • Breeding Associations
  • Croatian Agricultural Agency
  • AI centres
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SLIDE 13

Selection criteria

Total merit index (GEBV) ≥ 130 Without known genetic defects Seven young bulls were selected as bulls for AI

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Distribution

  • f GEBV for

main group

  • f traits

Distribution of GEBV N

34 137 71 4 3

total merit index

66 139 41 3

fitness

94 128 25 2

meat index

71 142 34 2

daily milk index 100 101-112 113-124 125-129 130 100 101-112 113-124 125-129 50 100 150 50 100 150

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SLIDE 15

Wamures Mozilla

Croatian bulls in Neustadt Aisch centre

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SLIDE 16

Selection criteria

Total merit index ≥ 150 Without known genetic defects None reached these standards so far

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SLIDE 17

Distribution of GEBV N

29 52 15

reproduction index

4 34 45 12 1

total merit index

31 51 13 1

conformation index

9 47 31 9

daily milk index 100 101-112 113-124 125-136 100 101-112 113-124 125-136 136 10 20 30 40 50 10 20 30 40 50

Distribution

  • f GEBV for

main group

  • f traits
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SLIDE 18

GS - benefits and

  • bstacles
  • Benefits

– Parentage verification – Information about major gene/disease defects – Increased usage of semen from domestic bulls - from 8% in 2012 to 23% in 2016 – Bring back breeders confidence in the national breeding program

  • Obstacles

– Small number of included breeders – Insufficient use of the ‘best bulls’ as bull sires – Adaption of German system to the national – A high price of GS – Lumpy skin disease

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SLIDE 19

Conclusions

  • Croatian Agricultural Agency - deeply

included in genomic services

  • Farm level - motivation of breeds to use

benefits of genomics

  • National level

– Breeding revitalization through production of genomically tested young bulls – Usage of semen from domestic bulls – Marketing semen of two young bulls internationally

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SLIDE 20

Perspectives

  • InterGenomics Holstein service

– Very good solution for small population - low input for quality service – No duplication of work process – fast implementation – Results for all animals at all scales of participation countries – An efficient way of connecting small populations

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Implementation of genomic selection in small populations Croatian case

Marija Špehar, Zdenko Ivkić, Maja Dražić, Zdravko Barać Croatian Agricultural Agency, http://www.hpa.hr/

Thank you for your attention.