Clonal diploid and autopolyploid breeding strategies to harness heterosis: insights from stochastic simulation

dc.creatorLabroo, M.
dc.creatorEndelman, J.
dc.creatorGemenet, D.
dc.creatorWerner, C.
dc.creatorGaynor, R.C.
dc.creatorCovarrubias-Pazaran, G.
dc.date2023-06-22T20:00:12Z
dc.date2023-06-22T20:00:12Z
dc.date2023
dc.date.accessioned2023-07-17T20:10:37Z
dc.date.available2023-07-17T20:10:37Z
dc.identifierhttps://hdl.handle.net/10883/22611
dc.identifier10.1007/s00122-023-04377-z
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7514354
dc.descriptionBreeding can change the dominance as well as additive genetic value of populations, thus utilizing heterosis. A common hybrid breeding strategy is reciprocal recurrent selection (RRS), in which parents of hybrids are typically recycled within pools based on general combining ability. However, the relative performances of RRS and other breeding strategies have not been thoroughly compared. RRS can have relatively increased costs and longer cycle lengths, but these are sometimes outweighed by its ability to harness heterosis due to dominance. Here, we used stochastic simulation to compare genetic gain per unit cost of RRS, terminal crossing, recurrent selection on breeding value, and recurrent selection on cross performance considering different amounts of population heterosis due to dominance, relative cycle lengths, time horizons, estimation methods, selection intensities, and ploidy levels. In diploids with phenotypic selection at high intensity, whether RRS was the optimal breeding strategy depended on the initial population heterosis. However, in diploids with rapid-cycling genomic selection at high intensity, RRS was the optimal breeding strategy after 50 years over almost all amounts of initial population heterosis under the study assumptions. Diploid RRS required more population heterosis to outperform other strategies as its relative cycle length increased and as selection intensity and time horizon decreased. The optimal strategy depended on selection intensity, a proxy for inbreeding rate. Use of diploid fully inbred parents vs. outbred parents with RRS typically did not affect genetic gain. In autopolyploids, RRS typically did not outperform one-pool strategies regardless of the initial population heterosis.
dc.languageEnglish
dc.publisherSpringer
dc.relationhttps://github.com/gaynorr/ClonalHybridStrategies
dc.rightsCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
dc.rightsOpen Access
dc.source7
dc.source136
dc.source0040-5752
dc.sourceTheoretical and Applied Genetics
dc.source147
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectReciprocal Recurrent Selection
dc.subjectClonal Diploids
dc.subjectDIPLOIDY
dc.subjectBREEDING
dc.subjectHETEROSIS
dc.subjectSTOCHASTIC MODELS
dc.subjectInstitutional
dc.titleClonal diploid and autopolyploid breeding strategies to harness heterosis: insights from stochastic simulation
dc.typeArticle
dc.typePublished Version
dc.coverageBerlin (Germany)


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