Show simple item record

resumen

Abstract
Wild potatoes (Solanum sp.) are important reservoirs of desirable genes for potato breeding. Most of them are diploid and obligate outcrossers, with both sexual and asexual reproduction. Samples of natural populations are ex situ conserved as accessions in germplasm banks for basic and applied ends, and are regenerated when seed number, seed viability or both decrease. The possible action of within accession internal reproductive barriers is not [ver mas...]
dc.contributor.authorPoulsen Hornum, Anabela
dc.contributor.authorCamadro, Elsa Lucila
dc.date.accessioned2021-02-26T13:14:42Z
dc.date.available2021-02-26T13:14:42Z
dc.date.issued2020-10-07
dc.identifier.issn1573-5109 (online)
dc.identifier.issn0925-9864 (print)
dc.identifier.otherhttps://doi.org/10.1007/s10722-020-01034-y
dc.identifier.urihttp://hdl.handle.net/20.500.12123/8762
dc.identifier.urihttps://link.springer.com/article/10.1007/s10722-020-01034-y
dc.description.abstractWild potatoes (Solanum sp.) are important reservoirs of desirable genes for potato breeding. Most of them are diploid and obligate outcrossers, with both sexual and asexual reproduction. Samples of natural populations are ex situ conserved as accessions in germplasm banks for basic and applied ends, and are regenerated when seed number, seed viability or both decrease. The possible action of within accession internal reproductive barriers is not considered in the current seed regeneration protocols, in which 20 to 25 plants are cultivated for the crossing work. Notwithstanding, the effective number of progenitors (Ne) in every seed regeneration cycle might be reduced in relation to the real number (N) of plants if internal reproductive barriers were acting; this process can eventually lead to gene erosion. To ascertain if Ne = N in seed regeneration of one randomly provided accession of S. chacoense Bitter, pollen viability and size, plus pollen-pistil relationships and number and type (according to endosperm development) of seeds/fruit were studied, respectively, at the individual plant and genotypic combination levels. Two types of barriers, pre-zygotic (pollen-pistil self- and cross-incompatibility) and post-zygotic (male sterility and inviability and weakness of F1 hybrids) were detected in three growing seasons, indicating that not all genotypes in this accession made an equal allele contribution to the next generation. These results should be an alert for germplasm bank curators of wild potatoes and other crop wild relatives. Since the objective of germplasm banks is the ex situ maintenance of the natural genetic diversity, strategies need to be devised based on genetic premises.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherSpringer Naturees_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceGenetic Resources and Crop Evolution 68 : 915–938 (2021)es_AR
dc.subjectPapaes_AR
dc.subjectPotatoeses_AR
dc.subjectSolanum Chacoensees_AR
dc.subjectBanco de Germoplasmaes_AR
dc.subjectGermplasm Bankseng
dc.subjectVariedades
dc.subjectVarietieseng
dc.subject.otherPapa Silvestre
dc.titleExpression of internal reproductive barriers in a germplasm bank accession of the wild potato Solanum chacoense Bitter in three ex situ regeneration cycleses_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.origenEEA Balcarcees_AR
dc.description.filFil: Poulsen Hornum, Anabela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentinaes_AR
dc.description.filFil: Camadro, Elsa Lucila. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentinaes_AR
dc.subtypecientifico


Files in this item

Thumbnail

This item appears in the following Collection(s)

common

Show simple item record