Heritability and phenotypic variation of double seeds in almond (Prunus dulcis)

In almond, the presence of double seeded nuts significantly reduces their commercial value. For this reason, in breeding programs of this species, seedlings producing double seeds are usually eliminated. In order to avoid this trait in the offspring and increase the efficiency of the breeding progra...

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Detalles Bibliográficos
Autores: Martínez-García, Pedro J., Ortega, Encarnación, Cremades Rosado, María Teresa, Dicenta, Federico
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2014
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/338791
Acceso en línea:http://hdl.handle.net/10261/338791
Access Level:acceso abierto
Palabra clave:Prunus dulcis
Almond breeding
Double seeds
Inheritance
Quantitative trait
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spelling Heritability and phenotypic variation of double seeds in almond (Prunus dulcis)Martínez-García, Pedro J.Ortega, EncarnaciónCremades Rosado, María TeresaDicenta, FedericoPrunus dulcisAlmond breedingDouble seedsInheritanceQuantitative traitIn almond, the presence of double seeded nuts significantly reduces their commercial value. For this reason, in breeding programs of this species, seedlings producing double seeds are usually eliminated. In order to avoid this trait in the offspring and increase the efficiency of the breeding programs it is important to know its genetic control. In this work, heritability of double seeds was estimated by midparent–offspring regression (narrow sense, h2) and by variance components analysis (broad sense, H2) for 3 years, in a population with a combination of full-sib and half-sib offspring coming from eight crosses designed for this objective. Heritability was high by both methods every year, and the values calculated by variance components were higher than those estimated by regression. The average ratio h2/H2 0.69 implies some influence of a non-additive effect for this trait, such as dominance and environmental effect. In this case, the influence of the temperatures preceding blooming on the percentage of double seeds can be inferred from our results, with lower temperatures increasing the percentage of double seeds. In the crosses between parents with high percentage of double seeds a normal (Gaussian) phenotypic distribution was observed. For crosses between one parent without double seeds and parents with high-medium percentage of double seeds a right-skew distribution (L-shaped) was observed, and certain transgressive segregation was observed in the descendants. This transgressive segregation was confirmed when both parents presented null percentage of double seeds. The results confirmed the complex architecture of this trait transmitted quantitatively, where additive, non-additive and genotype-by-environment interaction effects play an important role.This work has been supported by the project “Mejora Genética del Almendro” from the Spanish “Ministerio de Economía y Competitividad”Peer reviewedSpringerMinisterio de Economía y Competitividad (España)Martínez-García, Pedro J. [0000-0002-7647-5235]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232014info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/338791reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1007/s10681-014-1086-4Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3387912026-05-22T06:33:51Z
dc.title.none.fl_str_mv Heritability and phenotypic variation of double seeds in almond (Prunus dulcis)
title Heritability and phenotypic variation of double seeds in almond (Prunus dulcis)
spellingShingle Heritability and phenotypic variation of double seeds in almond (Prunus dulcis)
Martínez-García, Pedro J.
Prunus dulcis
Almond breeding
Double seeds
Inheritance
Quantitative trait
title_short Heritability and phenotypic variation of double seeds in almond (Prunus dulcis)
title_full Heritability and phenotypic variation of double seeds in almond (Prunus dulcis)
title_fullStr Heritability and phenotypic variation of double seeds in almond (Prunus dulcis)
title_full_unstemmed Heritability and phenotypic variation of double seeds in almond (Prunus dulcis)
title_sort Heritability and phenotypic variation of double seeds in almond (Prunus dulcis)
dc.creator.none.fl_str_mv Martínez-García, Pedro J.
Ortega, Encarnación
Cremades Rosado, María Teresa
Dicenta, Federico
author Martínez-García, Pedro J.
author_facet Martínez-García, Pedro J.
Ortega, Encarnación
Cremades Rosado, María Teresa
Dicenta, Federico
author_role author
author2 Ortega, Encarnación
Cremades Rosado, María Teresa
Dicenta, Federico
author2_role author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Martínez-García, Pedro J. [0000-0002-7647-5235]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Prunus dulcis
Almond breeding
Double seeds
Inheritance
Quantitative trait
topic Prunus dulcis
Almond breeding
Double seeds
Inheritance
Quantitative trait
description In almond, the presence of double seeded nuts significantly reduces their commercial value. For this reason, in breeding programs of this species, seedlings producing double seeds are usually eliminated. In order to avoid this trait in the offspring and increase the efficiency of the breeding programs it is important to know its genetic control. In this work, heritability of double seeds was estimated by midparent–offspring regression (narrow sense, h2) and by variance components analysis (broad sense, H2) for 3 years, in a population with a combination of full-sib and half-sib offspring coming from eight crosses designed for this objective. Heritability was high by both methods every year, and the values calculated by variance components were higher than those estimated by regression. The average ratio h2/H2 0.69 implies some influence of a non-additive effect for this trait, such as dominance and environmental effect. In this case, the influence of the temperatures preceding blooming on the percentage of double seeds can be inferred from our results, with lower temperatures increasing the percentage of double seeds. In the crosses between parents with high percentage of double seeds a normal (Gaussian) phenotypic distribution was observed. For crosses between one parent without double seeds and parents with high-medium percentage of double seeds a right-skew distribution (L-shaped) was observed, and certain transgressive segregation was observed in the descendants. This transgressive segregation was confirmed when both parents presented null percentage of double seeds. The results confirmed the complex architecture of this trait transmitted quantitatively, where additive, non-additive and genotype-by-environment interaction effects play an important role.
publishDate 2014
dc.date.none.fl_str_mv 2014
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/338791
url http://hdl.handle.net/10261/338791
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1007/s10681-014-1086-4
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
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