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Recent Developments in Genomic Selection for Minor Gene Quantitative Disease Resistance Plant Breeding

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Relation http://oar.icrisat.org/11174/
 
Title Recent Developments in Genomic Selection for Minor Gene Quantitative Disease Resistance Plant Breeding
 
Creator Bekele, D
Tesfaye, K
Fikre, A
 
Subject Plant Breeding
Genetics and Genomics
 
Description To speed up the development of improved crop varieties, genomics assisted plant breeding is becoming an important
tool. With traditional breeding and marker assisted selection, there have been several achievements in breeding for
diseases resistance. Most research for disease resistance has been focused on major disease resistance genes which
are highly effective although very vulnerable to breakdown with rapid changes in pathogenic races. In contrast,
breeding for minor gene quantitative resistance can produce more durable plant varieties although it is very slow
and challenging breeding. As the genetic architecture of the plant disease resistance shifts from single major R
genes to many minor quantitative genes, the most appropriate approach for molecular plant breeding is genomic
selection (GS) than marker assisted selection or conventional breeding. With the advent of new genomic tools, GS
has emerged as one of the most important approaches for predicting genotype performance to improve genetically
complex quantitative traits. Consequently, GS helps to accelerate the rate of genetic gain in breeding by using
whole genome sequence data to predict the breeding value of offspring. GS breeding for quantitative resistance
will therefore necessitate whole genome prediction models and selection methodology as implemented for classical
complex traits. With the implementation of GS for yield and other economically important traits, whole genome
marker profiles are available for the entire set of breeding lines, enabling genomic selection for disease resistance
with no additional direct cost. Therefore, recent developments in GS including a two stream GS + de novo GWAS
models (GS+) and GS for combined highest level of quantitative resistance with R genes (QR +R gene) individuals
are expected to further advance disease resistance plant breeding and briefly discussed.
 
Date 2019-04
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11174/2/recent-developments-in-genomic-selection-for-minor-gene-quantitative-disease-resistance-plant-breeding.pdf
Bekele, D and Tesfaye, K and Fikre, A (2019) Recent Developments in Genomic Selection for Minor Gene Quantitative Disease Resistance Plant Breeding. Journal of Plant Pathology & Microbiology, 10 (4) (478). pp. 1-8. ISSN 2157-7471