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Modeling Illustrates That Genomic Selection Provides New Opportunities for Intercrop Breeding

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Relation http://oar.icrisat.org/11726/
https://doi.org/10.3389/fpls.2021.605172
doi:10.3389/fpls.2021.605172
 
Title Modeling Illustrates That Genomic Selection Provides New Opportunities for Intercrop Breeding
 
Creator Bančič, j
Werner, C R
Gaynor, R C
Gorjanc, G
Odeny, D A
Ojulong, H F
Dawson, I K
Hoad, S P
Hickey, J M
 
Subject Plant Genetics
Plant Breeding
Pest Management
 
Description Intercrop breeding programs using genomic selection can produce faster genetic
gain than intercrop breeding programs using phenotypic selection. Intercropping is
an agricultural practice in which two or more component crops are grown together.
It can lead to enhanced soil structure and fertility, improved weed suppression, and
better control of pests and diseases. Especially in subsistence agriculture, intercropping
has great potential to optimize farming and increase profitability. However, breeding
for intercrop varieties is complex as it requires simultaneous improvement of two or
more component crops that combine well in the field. We hypothesize that genomic
selection can significantly simplify and accelerate the process of breeding crops for
intercropping. Therefore, we used stochastic simulation to compare four different
intercrop breeding programs implementing genomic selection and an intercrop breeding
program entirely based on phenotypic selection. We assumed three different levels of
genetic correlation between monocrop grain yield and intercrop grain yield to investigate
how the different breeding strategies are impacted by this factor. We found that
all four simulated breeding programs using genomic selection produced significantly
more intercrop genetic gain than the phenotypic selection program regardless of the
genetic correlation with monocrop yield.We suggest a genomic selection strategy which
combines monocrop and intercrop trait information to predict general intercropping
ability to increase selection accuracy in the early stages of a breeding program and
to minimize the generation interval.
 
Publisher Frontiers Media
 
Date 2021-02
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11726/1/fpls_12_605172.pdf
Bančič, j and Werner, C R and Gaynor, R C and Gorjanc, G and Odeny, D A and Ojulong, H F and Dawson, I K and Hoad, S P and Hickey, J M (2021) Modeling Illustrates That Genomic Selection Provides New Opportunities for Intercrop Breeding. Frontiers in Plant Science (TSI), 12. pp. 1-16. ISSN 1664-462X