Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae)
Somatic chromosome numbers of 131 accessions belonging to 55 Paspalum species from subtropical South America have been determined. All species had x = 10 as a basic chromosome number, except P. almum which had x = 6. Six ploidy levels were found among species with tetraploidy as the most frequent co...
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| Lenguaje: | English |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_09259864_v56_n4_p533_Hojsgaard |
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todo:paper_09259864_v56_n4_p533_Hojsgaard2023-10-03T15:46:31Z Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae) Hojsgaard, D. Honfi, A.I. Rua, G. Daviña, J. Chromosome races Genetic resources Grasses Paspalum Polyploidy chromosome genetic resource grass polyploidy reproductive strategy Paspalum Paspalum almum Paspalum conjugatum Paspalum ellipticum Paspalum erianthoides Paspalum ovale Paspalum paucifolium Paspalum remotum Poaceae Somatic chromosome numbers of 131 accessions belonging to 55 Paspalum species from subtropical South America have been determined. All species had x = 10 as a basic chromosome number, except P. almum which had x = 6. Six ploidy levels were found among species with tetraploidy as the most frequent condition. New diploid and octoploid counts were reported. For Paspalum lilloi and P. glabrinode (both 2n = 2x = 20), and for P. ellipticum, P. erianthoides, P. ovale and P. remotum (all 2n = 8x = 80) sporophytic chromosome numbers are presented for the first time. Records that differ from previously reported counts are given for the following species: P. paucifolium (2n = 2x = 20), P. ceresia (2n = 6x = 60), P. conjugatum (2n = 6x = 60), P. alcalinum (2n = 6x = 60) and P. aff. arundinellum (2n + 1 = 5x + 1 = 51). These chromosome data are discussed in light of ploidy-level variation and implications for breeding systems within and among species. © 2008 Springer Science+Business Media B.V. JOUR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09259864_v56_n4_p533_Hojsgaard |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| language |
English |
| orig_language_str_mv |
English |
| topic |
Chromosome races Genetic resources Grasses Paspalum Polyploidy chromosome genetic resource grass polyploidy reproductive strategy Paspalum Paspalum almum Paspalum conjugatum Paspalum ellipticum Paspalum erianthoides Paspalum ovale Paspalum paucifolium Paspalum remotum Poaceae |
| spellingShingle |
Chromosome races Genetic resources Grasses Paspalum Polyploidy chromosome genetic resource grass polyploidy reproductive strategy Paspalum Paspalum almum Paspalum conjugatum Paspalum ellipticum Paspalum erianthoides Paspalum ovale Paspalum paucifolium Paspalum remotum Poaceae Hojsgaard, D. Honfi, A.I. Rua, G. Daviña, J. Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae) |
| topic_facet |
Chromosome races Genetic resources Grasses Paspalum Polyploidy chromosome genetic resource grass polyploidy reproductive strategy Paspalum Paspalum almum Paspalum conjugatum Paspalum ellipticum Paspalum erianthoides Paspalum ovale Paspalum paucifolium Paspalum remotum Poaceae |
| description |
Somatic chromosome numbers of 131 accessions belonging to 55 Paspalum species from subtropical South America have been determined. All species had x = 10 as a basic chromosome number, except P. almum which had x = 6. Six ploidy levels were found among species with tetraploidy as the most frequent condition. New diploid and octoploid counts were reported. For Paspalum lilloi and P. glabrinode (both 2n = 2x = 20), and for P. ellipticum, P. erianthoides, P. ovale and P. remotum (all 2n = 8x = 80) sporophytic chromosome numbers are presented for the first time. Records that differ from previously reported counts are given for the following species: P. paucifolium (2n = 2x = 20), P. ceresia (2n = 6x = 60), P. conjugatum (2n = 6x = 60), P. alcalinum (2n = 6x = 60) and P. aff. arundinellum (2n + 1 = 5x + 1 = 51). These chromosome data are discussed in light of ploidy-level variation and implications for breeding systems within and among species. © 2008 Springer Science+Business Media B.V. |
| format |
JOUR |
| author |
Hojsgaard, D. Honfi, A.I. Rua, G. Daviña, J. |
| author_facet |
Hojsgaard, D. Honfi, A.I. Rua, G. Daviña, J. |
| author_sort |
Hojsgaard, D. |
| title |
Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae) |
| title_short |
Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae) |
| title_full |
Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae) |
| title_fullStr |
Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae) |
| title_full_unstemmed |
Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae) |
| title_sort |
chromosome numbers and ploidy levels of paspalum species from subtropical south america (poaceae) |
| url |
http://hdl.handle.net/20.500.12110/paper_09259864_v56_n4_p533_Hojsgaard |
| work_keys_str_mv |
AT hojsgaardd chromosomenumbersandploidylevelsofpaspalumspeciesfromsubtropicalsouthamericapoaceae AT honfiai chromosomenumbersandploidylevelsofpaspalumspeciesfromsubtropicalsouthamericapoaceae AT ruag chromosomenumbersandploidylevelsofpaspalumspeciesfromsubtropicalsouthamericapoaceae AT davinaj chromosomenumbersandploidylevelsofpaspalumspeciesfromsubtropicalsouthamericapoaceae |
| _version_ |
1807317845797765120 |