Cargando…
Identification of growth processes involved in QTLs for tomato fruit size and composition
Many quantitative trait loci (QTLs) for quality traits have been located on the tomato genetic map, but introgression of favourable wild alleles into large fruited species is hampered by co-localizations of QTLs with antagonist effects. The aim of this study was to assess the growth processes contro...
Autores principales: | , , , , |
---|---|
Formato: | Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2009
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3071768/ https://www.ncbi.nlm.nih.gov/pubmed/19033553 http://dx.doi.org/10.1093/jxb/ern281 |
_version_ | 1782201466773045248 |
---|---|
author | Bertin, Nadia Causse, Mathilde Brunel, Béatrice Tricon, David Génard, Michel |
author_facet | Bertin, Nadia Causse, Mathilde Brunel, Béatrice Tricon, David Génard, Michel |
author_sort | Bertin, Nadia |
collection | PubMed |
description | Many quantitative trait loci (QTLs) for quality traits have been located on the tomato genetic map, but introgression of favourable wild alleles into large fruited species is hampered by co-localizations of QTLs with antagonist effects. The aim of this study was to assess the growth processes controlled by the main QTLs for fruit size and composition. Four nearly isogenic lines (NILs) derived from an intraspecific cross between a tasty cherry tomato (Cervil) and a normal-tasting large fruit tomato (Levovil) were studied. The lines carried one (L2, L4, and L9) or five (Lx) introgressions from Cervil on chromosomes 1, 2, 4, and 9. QTLs for fruit size could be mainly associated with cell division processes in L2 and L9, whereas cell expansion was rather homogeneous among the genotypes, except Cervil for which the low expansion rate was attributed to low cell plasticity. The link between endoreduplication and fruit size remained unclear, as cell or fruit sizes were positively correlated with the cell DNA content, but not with the endoreduplication factor. QTLs for fruit composition reflected differences in water accumulation rather than in sugar accumulation, except in L9 for which the up-regulation of sucrose unloading and hexose transport and/or starch synthesis was suggested. This may explain the increased amount of carbon allocated to cell structures in L9, which could be related to a QTL for fruit texture. In Lx, these effects were attenuated, except on fruit size and cell division. Finally, the region on top of chromosome 9 may control size and composition attributes in tomato, by a combination of QTL effects on cell division, cell wall synthesis, and carbon import and metabolism. |
format | Text |
id | pubmed-3071768 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2009 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-30717682011-04-07 Identification of growth processes involved in QTLs for tomato fruit size and composition Bertin, Nadia Causse, Mathilde Brunel, Béatrice Tricon, David Génard, Michel J Exp Bot Research Papers Many quantitative trait loci (QTLs) for quality traits have been located on the tomato genetic map, but introgression of favourable wild alleles into large fruited species is hampered by co-localizations of QTLs with antagonist effects. The aim of this study was to assess the growth processes controlled by the main QTLs for fruit size and composition. Four nearly isogenic lines (NILs) derived from an intraspecific cross between a tasty cherry tomato (Cervil) and a normal-tasting large fruit tomato (Levovil) were studied. The lines carried one (L2, L4, and L9) or five (Lx) introgressions from Cervil on chromosomes 1, 2, 4, and 9. QTLs for fruit size could be mainly associated with cell division processes in L2 and L9, whereas cell expansion was rather homogeneous among the genotypes, except Cervil for which the low expansion rate was attributed to low cell plasticity. The link between endoreduplication and fruit size remained unclear, as cell or fruit sizes were positively correlated with the cell DNA content, but not with the endoreduplication factor. QTLs for fruit composition reflected differences in water accumulation rather than in sugar accumulation, except in L9 for which the up-regulation of sucrose unloading and hexose transport and/or starch synthesis was suggested. This may explain the increased amount of carbon allocated to cell structures in L9, which could be related to a QTL for fruit texture. In Lx, these effects were attenuated, except on fruit size and cell division. Finally, the region on top of chromosome 9 may control size and composition attributes in tomato, by a combination of QTL effects on cell division, cell wall synthesis, and carbon import and metabolism. Oxford University Press 2009-01 2008-11-25 /pmc/articles/PMC3071768/ /pubmed/19033553 http://dx.doi.org/10.1093/jxb/ern281 Text en © 2008 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. This paper is available online free of all access charges (see http://jxb.oxfordjournals.org/open_access.html for further details) |
spellingShingle | Research Papers Bertin, Nadia Causse, Mathilde Brunel, Béatrice Tricon, David Génard, Michel Identification of growth processes involved in QTLs for tomato fruit size and composition |
title | Identification of growth processes involved in QTLs for tomato fruit size and composition |
title_full | Identification of growth processes involved in QTLs for tomato fruit size and composition |
title_fullStr | Identification of growth processes involved in QTLs for tomato fruit size and composition |
title_full_unstemmed | Identification of growth processes involved in QTLs for tomato fruit size and composition |
title_short | Identification of growth processes involved in QTLs for tomato fruit size and composition |
title_sort | identification of growth processes involved in qtls for tomato fruit size and composition |
topic | Research Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3071768/ https://www.ncbi.nlm.nih.gov/pubmed/19033553 http://dx.doi.org/10.1093/jxb/ern281 |
work_keys_str_mv | AT bertinnadia identificationofgrowthprocessesinvolvedinqtlsfortomatofruitsizeandcomposition AT caussemathilde identificationofgrowthprocessesinvolvedinqtlsfortomatofruitsizeandcomposition AT brunelbeatrice identificationofgrowthprocessesinvolvedinqtlsfortomatofruitsizeandcomposition AT tricondavid identificationofgrowthprocessesinvolvedinqtlsfortomatofruitsizeandcomposition AT genardmichel identificationofgrowthprocessesinvolvedinqtlsfortomatofruitsizeandcomposition |