Nuclear DNA variation in diploid and polyploid taxa of Larrea (Zygophyllaceae)

A study of nuclear DNA content was made in telophase nuclei (2C) of the root apex of germinating seed in nine populations of the following species and cytotypes of Larrea: L. nitida (2x), L. divaricata (2x), L. cuneifolia (4x) and L. tridentata (2x, 4x, 6x). There were no significant differences in...

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Autores principales: Poggio, L., Burghardt, A.D., Hunziker, J.H.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0018067X_v63_n3_p321_Poggio
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_0018067X_v63_n3_p321_Poggio2023-10-03T14:15:20Z Nuclear DNA variation in diploid and polyploid taxa of Larrea (Zygophyllaceae) Poggio, L. Burghardt, A.D. Hunziker, J.H. A study of nuclear DNA content was made in telophase nuclei (2C) of the root apex of germinating seed in nine populations of the following species and cytotypes of Larrea: L. nitida (2x), L. divaricata (2x), L. cuneifolia (4x) and L. tridentata (2x, 4x, 6x). There were no significant differences in DNA content per basic monoploid genome among the diploid taxa nor between the latter and the tetraploid, among tetraploids or between tetraploids and the hexaploid. On the other hand, the difference between means was significant when all diploids were compared with the hexaploid cytotype. These results would indicate: (1) Speciation at the diploid level in Larrea has not produced great differences in DNA content per basic genome. This is in contrast with the related genus Bulnesia. (2) In Larrea there is a slight diminution in DNA content per basic genome when there is an increase in ploidy level. (3) Species of Larrea, Bulnesia and Pintoa (Zygophyllaceae) that inhabit the most arid environments are the ones possessing the highest DNA content. (4) This increase is due to an increment in ploidy level in Larrea and an augment of intrachromosomal DNA in Bulnesia and Pintoa. © 1989, The Genetical Society of Great Britain. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0018067X_v63_n3_p321_Poggio
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description A study of nuclear DNA content was made in telophase nuclei (2C) of the root apex of germinating seed in nine populations of the following species and cytotypes of Larrea: L. nitida (2x), L. divaricata (2x), L. cuneifolia (4x) and L. tridentata (2x, 4x, 6x). There were no significant differences in DNA content per basic monoploid genome among the diploid taxa nor between the latter and the tetraploid, among tetraploids or between tetraploids and the hexaploid. On the other hand, the difference between means was significant when all diploids were compared with the hexaploid cytotype. These results would indicate: (1) Speciation at the diploid level in Larrea has not produced great differences in DNA content per basic genome. This is in contrast with the related genus Bulnesia. (2) In Larrea there is a slight diminution in DNA content per basic genome when there is an increase in ploidy level. (3) Species of Larrea, Bulnesia and Pintoa (Zygophyllaceae) that inhabit the most arid environments are the ones possessing the highest DNA content. (4) This increase is due to an increment in ploidy level in Larrea and an augment of intrachromosomal DNA in Bulnesia and Pintoa. © 1989, The Genetical Society of Great Britain.
format JOUR
author Poggio, L.
Burghardt, A.D.
Hunziker, J.H.
spellingShingle Poggio, L.
Burghardt, A.D.
Hunziker, J.H.
Nuclear DNA variation in diploid and polyploid taxa of Larrea (Zygophyllaceae)
author_facet Poggio, L.
Burghardt, A.D.
Hunziker, J.H.
author_sort Poggio, L.
title Nuclear DNA variation in diploid and polyploid taxa of Larrea (Zygophyllaceae)
title_short Nuclear DNA variation in diploid and polyploid taxa of Larrea (Zygophyllaceae)
title_full Nuclear DNA variation in diploid and polyploid taxa of Larrea (Zygophyllaceae)
title_fullStr Nuclear DNA variation in diploid and polyploid taxa of Larrea (Zygophyllaceae)
title_full_unstemmed Nuclear DNA variation in diploid and polyploid taxa of Larrea (Zygophyllaceae)
title_sort nuclear dna variation in diploid and polyploid taxa of larrea (zygophyllaceae)
url http://hdl.handle.net/20.500.12110/paper_0018067X_v63_n3_p321_Poggio
work_keys_str_mv AT poggiol nucleardnavariationindiploidandpolyploidtaxaoflarreazygophyllaceae
AT burghardtad nucleardnavariationindiploidandpolyploidtaxaoflarreazygophyllaceae
AT hunzikerjh nucleardnavariationindiploidandpolyploidtaxaoflarreazygophyllaceae
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