2021
DOI: 10.1101/2021.02.15.431233
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How to achieve a higher selection plateau in forest tree breeding? Fostering Heterozygote x Homozygote relationships in Optimal Contribution Selection in the case study of Populus nigra

Abstract: In breeding programs, balancing short-term genetic gain and loss of diversity per generation is essential to sustain a long-term genetic response. Depending on the dynamic of the species, the acceptable trade-off will be different. One of the most common and successful tools to achieve this management is the Optimal Contribution Selection (OCS), which readily mathematically formulate the trade-off between genetic gain and coancestry. However, OCS only accounts for the next generation gain and diversity, which … Show more

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Cited by 2 publications
(3 citation statements)
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References 63 publications
(106 reference statements)
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“…Varieties can be selected for fall dormancy during the breeding cycle using molecular markers. Our results also show that flowering date can be predicted and used to optimise seed crosses between parents to increase genetic gain and manage genetic diversity, as has been proposed in other species (Tiret et al, 2021). Advances in genomics-assisted breeding offer exceptional prospects for improving alfalfa's performance.…”
Section: Genomic Predictionmentioning
confidence: 53%
“…Varieties can be selected for fall dormancy during the breeding cycle using molecular markers. Our results also show that flowering date can be predicted and used to optimise seed crosses between parents to increase genetic gain and manage genetic diversity, as has been proposed in other species (Tiret et al, 2021). Advances in genomics-assisted breeding offer exceptional prospects for improving alfalfa's performance.…”
Section: Genomic Predictionmentioning
confidence: 53%
“…In the current study, we preferred considering an approach optimizing both selection and matings. A very recent study [40] proposes a weighting method to modify the additive relationship matrix used on OCS and promote in turn individuals carrying multiple heterozygous loci, resulting in benefits in short-term genetic gains and higher selection plateau. Although it is a promising alternative to OCS without the computational burden of mate selection, it is not intended to control explicitly inbreeding at a per generation basis.…”
Section: Discussionmentioning
confidence: 99%
“…Following this last rule, the high-ranking parents mate a diversifying panel of individuals in terms of ranking, while the parents with the lowest ranks never mate together. This resembles to a compensatory mating scheme where carriers of favorable alleles preferentially mate non-carriers [40, 41]. These simple rules could help breeders to optimize selection and matings without complex analyses.…”
Section: Discussionmentioning
confidence: 99%