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The Pitfalls of Heterosis Coefficients

Heterosis (hybrid vigour) is a universal phenomenon of crucial agro-economic and evolutionary importance. We show that the most common heterosis coefficients do not properly measure deviation from additivity because they include both a component accounting for “real” heterosis and a term that is not...

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Autores principales: de Vienne, Dominique, Fiévet, Julie B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7412094/
https://www.ncbi.nlm.nih.gov/pubmed/32660108
http://dx.doi.org/10.3390/plants9070875
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author de Vienne, Dominique
Fiévet, Julie B.
author_facet de Vienne, Dominique
Fiévet, Julie B.
author_sort de Vienne, Dominique
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description Heterosis (hybrid vigour) is a universal phenomenon of crucial agro-economic and evolutionary importance. We show that the most common heterosis coefficients do not properly measure deviation from additivity because they include both a component accounting for “real” heterosis and a term that is not related to heterosis, since it is derived solely from parental values. Therefore, these coefficients are inadequate whenever the aim of the study is to compare heterosis levels between different traits, environments, genetic backgrounds, or developmental stages, as these factors may affect not only the level of non-additivity, but also parental values. The only relevant coefficient for such comparisons is the so-called “potence ratio”. Because most heterosis studies consider several traits/stages/environmental conditions, our observations support the use of the potence ratio, at least in non-agronomic contexts, because it is the only non-ambiguous heterosis coefficient.
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spelling pubmed-74120942020-08-25 The Pitfalls of Heterosis Coefficients de Vienne, Dominique Fiévet, Julie B. Plants (Basel) Commentary Heterosis (hybrid vigour) is a universal phenomenon of crucial agro-economic and evolutionary importance. We show that the most common heterosis coefficients do not properly measure deviation from additivity because they include both a component accounting for “real” heterosis and a term that is not related to heterosis, since it is derived solely from parental values. Therefore, these coefficients are inadequate whenever the aim of the study is to compare heterosis levels between different traits, environments, genetic backgrounds, or developmental stages, as these factors may affect not only the level of non-additivity, but also parental values. The only relevant coefficient for such comparisons is the so-called “potence ratio”. Because most heterosis studies consider several traits/stages/environmental conditions, our observations support the use of the potence ratio, at least in non-agronomic contexts, because it is the only non-ambiguous heterosis coefficient. MDPI 2020-07-09 /pmc/articles/PMC7412094/ /pubmed/32660108 http://dx.doi.org/10.3390/plants9070875 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Commentary
de Vienne, Dominique
Fiévet, Julie B.
The Pitfalls of Heterosis Coefficients
title The Pitfalls of Heterosis Coefficients
title_full The Pitfalls of Heterosis Coefficients
title_fullStr The Pitfalls of Heterosis Coefficients
title_full_unstemmed The Pitfalls of Heterosis Coefficients
title_short The Pitfalls of Heterosis Coefficients
title_sort pitfalls of heterosis coefficients
topic Commentary
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7412094/
https://www.ncbi.nlm.nih.gov/pubmed/32660108
http://dx.doi.org/10.3390/plants9070875
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