Improving the analysis of low heritability complex traits for enhanced genetic gain in potato

Slater, Anthony T., Wilson, Graeme M., Cogan, Noel O. I., Forster, John W. and Hayes, Benjamin J. (2014) Improving the analysis of low heritability complex traits for enhanced genetic gain in potato. Theoretical and Applied Genetics, 127 4: 809-820. doi:10.1007/s00122-013-2258-7


Author Slater, Anthony T.
Wilson, Graeme M.
Cogan, Noel O. I.
Forster, John W.
Hayes, Benjamin J.
Title Improving the analysis of low heritability complex traits for enhanced genetic gain in potato
Journal name Theoretical and Applied Genetics   Check publisher's open access policy
ISSN 0040-5752
1432-2242
Publication date 2014-04
Sub-type Article (original research)
DOI 10.1007/s00122-013-2258-7
Open Access Status Not yet assessed
Volume 127
Issue 4
Start page 809
End page 820
Total pages 12
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Abstract Conventional potato breeding strategies, based on outcrossing followed by phenotypic recurrent selection over a number of generations, can result in slow but steady improvements of traits with moderate to high heritability. However, faster gains, particularly for low heritability traits, could be made by selection on estimated breeding values (EBVs) calculated using more complete pedigree information in best linear unbiased prediction (BLUP) analysis. One complication in applying BLUP predictions of breeding value to potato breeding programs is the autotetraploid inheritance pattern of this species. Here we have used a large pedigree, dating back to 1908, to estimate heritability for nine key traits for potato breeding, modelling autotetraploid inheritance. We estimate the proportion of double reduction in potatoes from our data, and across traits, to be in the order of 10 %. Estimates of heritability ranged from 0.21 for breeder's visual preference, 0.58 for tuber yield, to 0.83 for plant maturity. Using the accuracies of the EBVs determined by cross generational validation, we model the genetic gain that could be achieved by selection of genotypes for breeding on BLUP EBVs and demonstrate that gains can be greater than in conventional schemes.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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