Evolutionary cytogenetics in Americans Legumes

Chromosomic features described so far for Americans legumes are reviewed and analyzed, simultaneously with morphological and molecular characters. This is an invaluable opportunity to propose hypotheses about chromosome changes during the family divergence and speciation processes. The chromosome st...

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Detalles Bibliográficos
Publicado: 2008
Materias:
America
Chromosome evolution
Cytogenetics
Hybridization
Leguminosae
Poliploidía
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03706583_v59_n3_p423_Poggio
http://hdl.handle.net/20.500.12110/paper_03706583_v59_n3_p423_Poggio
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03706583_v59_n3_p423_Poggio
record_format dspace
spelling paper:paper_03706583_v59_n3_p423_Poggio2023-06-08T15:37:48Z Evolutionary cytogenetics in Americans Legumes America Chromosome evolution Cytogenetics Hybridization Leguminosae Poliploidía Chromosomic features described so far for Americans legumes are reviewed and analyzed, simultaneously with morphological and molecular characters. This is an invaluable opportunity to propose hypotheses about chromosome changes during the family divergence and speciation processes. The chromosome studies showed wide inter-generic, inter and intra-specific variability, as well as marked differences in genome sizes between genera, species and populations. By postulating an ancestral basic number of seven (x=7) it is possible to deduce that polyploid hybrid speciation was very important in the diversification of the family as a whole. Due to increasing and decreasing diploidy processes, secondary basic numbers and modified polyploids series could have arised both at diploid and polyploid levels. On the other hand, recurrent origin of polyploids, occurrence of inter-genomic rearrangements, hybridization and secondary polyploidy are all processes that make it difficult to group the taxa within the Leguminosae family in a natural sequence. © 2008 Instituto de Pesquisas Jardim Botanico do Rio de Janeiro.All right reserved. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03706583_v59_n3_p423_Poggio http://hdl.handle.net/20.500.12110/paper_03706583_v59_n3_p423_Poggio
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic America
Chromosome evolution
Cytogenetics
Hybridization
Leguminosae
Poliploidía
spellingShingle America
Chromosome evolution
Cytogenetics
Hybridization
Leguminosae
Poliploidía
Evolutionary cytogenetics in Americans Legumes
topic_facet America
Chromosome evolution
Cytogenetics
Hybridization
Leguminosae
Poliploidía
description Chromosomic features described so far for Americans legumes are reviewed and analyzed, simultaneously with morphological and molecular characters. This is an invaluable opportunity to propose hypotheses about chromosome changes during the family divergence and speciation processes. The chromosome studies showed wide inter-generic, inter and intra-specific variability, as well as marked differences in genome sizes between genera, species and populations. By postulating an ancestral basic number of seven (x=7) it is possible to deduce that polyploid hybrid speciation was very important in the diversification of the family as a whole. Due to increasing and decreasing diploidy processes, secondary basic numbers and modified polyploids series could have arised both at diploid and polyploid levels. On the other hand, recurrent origin of polyploids, occurrence of inter-genomic rearrangements, hybridization and secondary polyploidy are all processes that make it difficult to group the taxa within the Leguminosae family in a natural sequence. © 2008 Instituto de Pesquisas Jardim Botanico do Rio de Janeiro.All right reserved.
title Evolutionary cytogenetics in Americans Legumes
title_short Evolutionary cytogenetics in Americans Legumes
title_full Evolutionary cytogenetics in Americans Legumes
title_fullStr Evolutionary cytogenetics in Americans Legumes
title_full_unstemmed Evolutionary cytogenetics in Americans Legumes
title_sort evolutionary cytogenetics in americans legumes
publishDate 2008
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03706583_v59_n3_p423_Poggio
http://hdl.handle.net/20.500.12110/paper_03706583_v59_n3_p423_Poggio
_version_ 1768541990477103104

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