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Marker-based estimates reveal significant non-additive effects in clonally propagated cassava (Manihot esculenta): implications for the prediction of total genetic value and the selection of varieties

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Title Marker-based estimates reveal significant non-additive effects in clonally propagated cassava (Manihot esculenta): implications for the prediction of total genetic value and the selection of varieties
 
Creator Wolfe, M.D.
Kulakow, P.A.
Rabbi, Ismail Y.
Jannink, Jean-Luc
 
Subject cassava
food crops
genomic features
 
Description Open Access Journal
In clonally propagated crops, non-additive genetic effects can be effectively exploited by the identification of superior genetic individuals as varieties. Cassava (Manihot esculenta Crantz) is a clonally propagated staple food crop that feeds hundreds of millions. We quantified the amount and nature of non-additive genetic variation for key traits in a breeding population of cassava from sub-Saharan Africa using additive and non-additive genome-wide marker-based relationship matrices. We then assessed the accuracy of genomic prediction of additive compared to total (additive plus non-additive) genetic value. We confirmed previous findings based on diallel populations, that non-additive genetic variation is significant, especially for yield traits. Further, we show that we total genetic value correlated more strongly to observed phenotypes than did additive value, although this is constrained by low broad-sense heritability and is not beneficial for traits with already high heritability. We address the implication of these results for cassava breeding and put our work in the context of previous results in cassava, and other plant and animal species.
 
Date 2016-11-01
2016-09-27T11:11:37Z
2016-09-27T11:11:37Z
 
Type Journal Article
 
Identifier Wolfe, M.D., Kulakow, P., Rabbi, I. & Jannink, Jean-Luc. (2016). Marker-based estimates reveal significant non-additive effects in clonally propagated cassava (Manihot esculenta): implications for the prediction of total genetic value and the selection of varieties. G3-Genes Genomes Genetics, 1-41
2160-1836
https://hdl.handle.net/10568/77138
https://doi.org/10.1534/g3.116.033332
 
Language en
 
Rights Open Access
 
Format 1-41
application/pdf
 
Publisher Oxford University Press (OUP)
 
Source G3: Genes, Genomes, Genetics