Little heterosis found in diploid hybrid potato: The genetic underpinnings of a new hybrid crop
AbstractHybrid potato breeding has become a novel alternative to conventional potato breeding allowing breeders to overcome intractable barriers (e.g. tetrasomic inheritance, masked deleterious alleles, obligate clonal propagation) with the benefit of seed-based propagule, flexible p...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Oxford University Press
2022-04-01
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| Series: | G3: Genes, Genomes, Genetics |
| Online Access: | https://academic.oup.com/g3journal/article-lookup/doi/10.1093/g3journal/jkac076 |
| _version_ | 1811295224666783744 |
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| author | James R Adams Michiel E de Vries Chaozhi Zheng Fred A van Eeuwijk |
| author_facet | James R Adams Michiel E de Vries Chaozhi Zheng Fred A van Eeuwijk |
| author_sort | James R Adams |
| collection | DOAJ |
| description |
AbstractHybrid potato breeding has become a novel alternative to conventional potato breeding allowing breeders to overcome intractable barriers (e.g. tetrasomic inheritance, masked deleterious alleles, obligate clonal propagation) with the benefit of seed-based propagule, flexible population design, and the potential of hybrid vigor. Until now, however, no formal inquiry has adequately examined the relevant genetic components for complex traits in hybrid potato populations. In this present study, we use a 2-step multivariate modeling approach to estimate the variance components to assess the magnitude of the general and specific combining abilities in diploid hybrid potato. Specific combining ability effects were identified for all yield components studied here warranting evidence of nonadditive genetic effects in hybrid potato yield. However, the estimated general combining ability effects were on average 2 times larger than their respective specific combining ability quantile across all yield phenotypes. Tuber number general combining abilities and specific combining abilities were found to be highly correlated with total yield’s genetic components. Tuber volume was shown to have the largest proportion of additive and nonadditive genetic variation suggesting under-selection of this phenotype in this population. The prominence of additive effects found for all traits presents evidence that the mid-parent value alone is useful for hybrid potato evaluation. Heterotic vigor stands to be useful in bolstering simpler traits but this will be dependent on target phenotypes and market requirements. This study represents the first diallel analysis of its kind in diploid potato using material derived from a commercial hybrid breeding program. |
| first_indexed | 2024-04-13T05:29:24Z |
| format | Article |
| id | doaj.art-628482357b6e45d692939ec6570e2dae |
| institution | Directory Open Access Journal |
| issn | 2160-1836 |
| language | English |
| last_indexed | 2024-04-13T05:29:24Z |
| publishDate | 2022-04-01 |
| publisher | Oxford University Press |
| record_format | Article |
| series | G3: Genes, Genomes, Genetics |
| spelling | doaj.art-628482357b6e45d692939ec6570e2dae2022-12-22T03:00:29ZengOxford University PressG3: Genes, Genomes, Genetics2160-18362022-04-0112610.1093/g3journal/jkac076Little heterosis found in diploid hybrid potato: The genetic underpinnings of a new hybrid cropJames R Adams0https://orcid.org/0000-0002-9111-6636Michiel E de Vries1https://orcid.org/0000-0002-1453-7672Chaozhi Zheng2https://orcid.org/0000-0001-6030-3933Fred A van Eeuwijk3https://orcid.org/0000-0003-3672-2921Biometris, Mathematical and Statistical Methods, Wageningen University and Research, 6700 HB Wageningen, The NetherlandsSolynta, 6703 HA Wageningen, The NetherlandsBiometris, Mathematical and Statistical Methods, Wageningen University and Research, 6700 HB Wageningen, The NetherlandsBiometris, Mathematical and Statistical Methods, Wageningen University and Research, 6700 HB Wageningen, The Netherlands AbstractHybrid potato breeding has become a novel alternative to conventional potato breeding allowing breeders to overcome intractable barriers (e.g. tetrasomic inheritance, masked deleterious alleles, obligate clonal propagation) with the benefit of seed-based propagule, flexible population design, and the potential of hybrid vigor. Until now, however, no formal inquiry has adequately examined the relevant genetic components for complex traits in hybrid potato populations. In this present study, we use a 2-step multivariate modeling approach to estimate the variance components to assess the magnitude of the general and specific combining abilities in diploid hybrid potato. Specific combining ability effects were identified for all yield components studied here warranting evidence of nonadditive genetic effects in hybrid potato yield. However, the estimated general combining ability effects were on average 2 times larger than their respective specific combining ability quantile across all yield phenotypes. Tuber number general combining abilities and specific combining abilities were found to be highly correlated with total yield’s genetic components. Tuber volume was shown to have the largest proportion of additive and nonadditive genetic variation suggesting under-selection of this phenotype in this population. The prominence of additive effects found for all traits presents evidence that the mid-parent value alone is useful for hybrid potato evaluation. Heterotic vigor stands to be useful in bolstering simpler traits but this will be dependent on target phenotypes and market requirements. This study represents the first diallel analysis of its kind in diploid potato using material derived from a commercial hybrid breeding program.https://academic.oup.com/g3journal/article-lookup/doi/10.1093/g3journal/jkac076 |
| spellingShingle | James R Adams Michiel E de Vries Chaozhi Zheng Fred A van Eeuwijk Little heterosis found in diploid hybrid potato: The genetic underpinnings of a new hybrid crop G3: Genes, Genomes, Genetics |
| title | Little heterosis found in diploid hybrid potato: The genetic underpinnings of a new hybrid crop |
| title_full | Little heterosis found in diploid hybrid potato: The genetic underpinnings of a new hybrid crop |
| title_fullStr | Little heterosis found in diploid hybrid potato: The genetic underpinnings of a new hybrid crop |
| title_full_unstemmed | Little heterosis found in diploid hybrid potato: The genetic underpinnings of a new hybrid crop |
| title_short | Little heterosis found in diploid hybrid potato: The genetic underpinnings of a new hybrid crop |
| title_sort | little heterosis found in diploid hybrid potato the genetic underpinnings of a new hybrid crop |
| url | https://academic.oup.com/g3journal/article-lookup/doi/10.1093/g3journal/jkac076 |
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