HIBRIDOS INTERESPECIFICOS DE "PASPALUM NOTATUM" X "P. MODESTUM"

A highly sexual white stigma Bahiagrass: Paspalum notatum clone SWSB (2n=4x=40) was crossed withP.modestum (2n=2x=20) in or- der to investígate the cytogenetic relations between these species.Fi- ve seedlings were recovered from 196 P. notatum SWSB spikelets that were emasculated and pollinated with...

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Autor principal: QUARIN, CAMILO L.
Formato: Artículo revista
Lenguaje:Español
Publicado: Instituto de Botánica del Nordeste 1981
Acceso en línea:https://revistas.unne.edu.ar/index.php/bon/article/view/8297
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Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-8297
record_format ojs
spelling I48-R154-article-82972025-05-29T23:04:59Z HIBRIDOS INTERESPECIFICOS DE "PASPALUM NOTATUM" X "P. MODESTUM" QUARIN, CAMILO L. A highly sexual white stigma Bahiagrass: Paspalum notatum clone SWSB (2n=4x=40) was crossed withP.modestum (2n=2x=20) in or- der to investígate the cytogenetic relations between these species.Fi- ve seedlings were recovered from 196 P. notatum SWSB spikelets that were emasculated and pollinated with P.modestum pollen. Chromo- some counts in root tips revealed that all were hybrids with 2n=3x=30 chromosomes associated during diakinesis and metaphase I, mainly as 10 univalents and 10 bivalents, with a mean of 10 univalents, 9,73 bivalents, 0,09 trivalents, and 0,07 quadrivalents per cell. Becausethe highly sexual SWSB Bahiagrass clone as well as the apomictic Com - mon Bahiagrass types are autotetraploids (2n=4x=40, NNNN) it is suggested that P. notatum brought into the hybrids two pairs of ho- mologous genomes NN, whereas P. modestum1 contributed withadif- ferent genome, which is tentatively named P, since this species has been included in the Plicatula group of Paspalum, according to its morphological characteristics. Thus, the meiotic chromosome assoda- tions in the hybrids would indicated that P.notatum and P.modestum have different genomes, remainig unknown the genomic relations of P.modestum. Only l’our hybrids produced inflorescences.Anthesis occurred only in few spikelets, but anthers did not dehisce. None of the hybrids produced seeds. Instituto de Botánica del Nordeste 1981-05-29 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unne.edu.ar/index.php/bon/article/view/8297 10.30972/bon.521-298297 Bonplandia; Vol. 5 No. 21-29 (1981); 235-242 Bonplandia; Vol. 5 Núm. 21-29 (1981); 235-242 1853-8460 0524-0476 spa https://revistas.unne.edu.ar/index.php/bon/article/view/8297/7851 Derechos de autor 2025 Bonplandia http://creativecommons.org/licenses/by/4.0
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-154
container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
author QUARIN, CAMILO L.
spellingShingle QUARIN, CAMILO L.
HIBRIDOS INTERESPECIFICOS DE "PASPALUM NOTATUM" X "P. MODESTUM"
author_facet QUARIN, CAMILO L.
author_sort QUARIN, CAMILO L.
title HIBRIDOS INTERESPECIFICOS DE "PASPALUM NOTATUM" X "P. MODESTUM"
title_short HIBRIDOS INTERESPECIFICOS DE "PASPALUM NOTATUM" X "P. MODESTUM"
title_full HIBRIDOS INTERESPECIFICOS DE "PASPALUM NOTATUM" X "P. MODESTUM"
title_fullStr HIBRIDOS INTERESPECIFICOS DE "PASPALUM NOTATUM" X "P. MODESTUM"
title_full_unstemmed HIBRIDOS INTERESPECIFICOS DE "PASPALUM NOTATUM" X "P. MODESTUM"
title_sort hibridos interespecificos de "paspalum notatum" x "p. modestum"
description A highly sexual white stigma Bahiagrass: Paspalum notatum clone SWSB (2n=4x=40) was crossed withP.modestum (2n=2x=20) in or- der to investígate the cytogenetic relations between these species.Fi- ve seedlings were recovered from 196 P. notatum SWSB spikelets that were emasculated and pollinated with P.modestum pollen. Chromo- some counts in root tips revealed that all were hybrids with 2n=3x=30 chromosomes associated during diakinesis and metaphase I, mainly as 10 univalents and 10 bivalents, with a mean of 10 univalents, 9,73 bivalents, 0,09 trivalents, and 0,07 quadrivalents per cell. Becausethe highly sexual SWSB Bahiagrass clone as well as the apomictic Com - mon Bahiagrass types are autotetraploids (2n=4x=40, NNNN) it is suggested that P. notatum brought into the hybrids two pairs of ho- mologous genomes NN, whereas P. modestum1 contributed withadif- ferent genome, which is tentatively named P, since this species has been included in the Plicatula group of Paspalum, according to its morphological characteristics. Thus, the meiotic chromosome assoda- tions in the hybrids would indicated that P.notatum and P.modestum have different genomes, remainig unknown the genomic relations of P.modestum. Only l’our hybrids produced inflorescences.Anthesis occurred only in few spikelets, but anthers did not dehisce. None of the hybrids produced seeds.
publisher Instituto de Botánica del Nordeste
publishDate 1981
url https://revistas.unne.edu.ar/index.php/bon/article/view/8297
work_keys_str_mv AT quarincamilol hibridosinterespecificosdepaspalumnotatumxpmodestum
first_indexed 2025-06-17T05:00:47Z
last_indexed 2025-06-17T05:00:47Z
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