Cytogenetic studies in triploid and tetraploid hybrids of Turnera krapovickasii, T. scabra and T. subulata (Passifloraceae, Turneroideae).

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Cytogenetic studies in triploid and tetraploid hybrids of Turnera krapovickasii, T. scabra and T. subulata (Passifloraceae, Turneroideae). In order to investigate the genomic relationships among species of series Turnera (x= 5), a controlled crossing program was performed and yielded numerous hybrid...

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Autores principales: Fernández, Aveliano, Fernández, Silvia A., Kovalsky, Ivana E., Solís Neffa, Viviana G.
Formato: Artículo revista
Lenguaje:Español
Publicado: Sociedad Argentina de Botánica 2017
Materias:
Turnera
meiosis
genomic relationships
triploid
tetraploid.
relaciones genómicas
triploides
tetraploides.
Acceso en línea:https://revistas.unc.edu.ar/index.php/BSAB/article/view/18858
Aporte de:
Revistas de la UNC de Universidad Nacional de Córdoba
id I10-R10-article-18858
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spelling I10-R10-article-188582019-12-14T13:47:05Z Cytogenetic studies in triploid and tetraploid hybrids of Turnera krapovickasii, T. scabra and T. subulata (Passifloraceae, Turneroideae). Estudios citogenéticos en híbridos triploides y tetraploides de Turnera krapovickasii, T. scabra y T. subulata (Passifloraceae, Turneroideae). Fernández, Aveliano Fernández, Silvia A. Kovalsky, Ivana E. Solís Neffa, Viviana G. Turnera meiosis genomic relationships triploid tetraploid. Turnera meiosis relaciones genómicas triploides tetraploides. Cytogenetic studies in triploid and tetraploid hybrids of Turnera krapovickasii, T. scabra and T. subulata (Passifloraceae, Turneroideae). In order to investigate the genomic relationships among species of series Turnera (x= 5), a controlled crossing program was performed and yielded numerous hybrids. Among the yellow flowered species of series Turnera, T. krapovickasii, T. scabra and T. subulata have diploid and autotetraploid cytotypes. So far, the degree of reproductive isolation between diploids and autotetraploids, and the degree of genomic affinity at tetraploid level are unknown. In this study, we present the results of the cytogenetic analysis of triploid (2n=3x=15) intraspecific hybrids of T. krapovickasii and T. scabra and tetraploid (2n=4x=20) (2n=4x=20) T. krapovickasii × T. scabra and T. subulata × T. scabra hybrids. In the triploid hybrids we found cells with 1 to 5 trivalents and the pollen viability was 11.4% - 15.2%. In the tetraploid hybrids we found cells with 1 to 5 quadrivalents and the pollen viability was 76% - 87.97%. The results of this work revealed that the reproductive isolation between diploids and tetraploids is incomplete, and that the triploid hybrids are not completely steriles. Likewise, the cytogenetic analysis of the interspecific hybrids evidenced that the genomes of T. krapovickasii, T. scabra and T. subulata display more affinity at tetraploid level than at diploid level. A fin de investigar las relaciones genómicas entre especies de la serie Turnera (x= 5), se lleva a cabo un programa de cruzamientos controlados y se obtuvieron numerosos híbridos. Entre las especies con flores amarillas de la serie Turnera, T. krapovickasii, T. scabra y T. subulata poseen citotipos diploide y autotetraploide. Hasta el momento se desconocen el grado de aislamiento reproductivo entre diploides y tetraploides y el grado de afinidad genómica de estas especies a nivel tetraploide. En este trabajo se presentan los resultados del análisis citogenético de los híbridos intraespecíficos triploides (2n=3x=15) de T. krapovickasii y T. scabra y los híbridos tetraploides (2n=4x=20) T. krapovickasii × T. scabra y T. subulata × T. scabra. En los híbridos triploides se hallaron 1-5 trivalentes y la viabilidad del polen fue 11,3% - 15,2%. En los híbridos tetraploides se encontraron células con hasta 5 cuadrivalentes y la viabilidad del polen fue 76% - 87,97%. Los resultados obtenidos demostraron que el aislamiento reproductivo entre diploides y tetraploides es incompleto y que los híbridos triploides no son completamente estériles. Asimismo, se evidenció que los genomios de T. krapovickasii, T. scabra y T. subulata serían más afines a nivel tetraploide que a nivel diploide. Sociedad Argentina de Botánica 2017-12-15 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo original application/pdf https://revistas.unc.edu.ar/index.php/BSAB/article/view/18858 Boletín de la Sociedad Argentina de Botánica (Journal of the Argentine Botanical Society; Vol. 52 No. 4 (2017): December; 705-715 Boletín de la Sociedad Argentina de Botánica; Vol. 52 Núm. 4 (2017): Diciembre; 705-715 Boletín de la Sociedad Argentina de Botánica; v. 52 n. 4 (2017): Diciembre; 705-715 1851-2372 0373-580X 10.31055/1851.2372.v52.n4 spa https://revistas.unc.edu.ar/index.php/BSAB/article/view/18858/18746 Derechos de autor 2017 Boletín de la Sociedad Argentina de Botánica
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-10
container_title_str Revistas de la UNC
language Español
format Artículo revista
topic Turnera
meiosis
genomic relationships
triploid
tetraploid.
Turnera
meiosis
relaciones genómicas
triploides
tetraploides.
spellingShingle Turnera
meiosis
genomic relationships
triploid
tetraploid.
Turnera
meiosis
relaciones genómicas
triploides
tetraploides.
Fernández, Aveliano
Fernández, Silvia A.
Kovalsky, Ivana E.
Solís Neffa, Viviana G.
Cytogenetic studies in triploid and tetraploid hybrids of Turnera krapovickasii, T. scabra and T. subulata (Passifloraceae, Turneroideae).
topic_facet Turnera
meiosis
genomic relationships
triploid
tetraploid.
Turnera
meiosis
relaciones genómicas
triploides
tetraploides.
author Fernández, Aveliano
Fernández, Silvia A.
Kovalsky, Ivana E.
Solís Neffa, Viviana G.
author_facet Fernández, Aveliano
Fernández, Silvia A.
Kovalsky, Ivana E.
Solís Neffa, Viviana G.
author_sort Fernández, Aveliano
title Cytogenetic studies in triploid and tetraploid hybrids of Turnera krapovickasii, T. scabra and T. subulata (Passifloraceae, Turneroideae).
title_short Cytogenetic studies in triploid and tetraploid hybrids of Turnera krapovickasii, T. scabra and T. subulata (Passifloraceae, Turneroideae).
title_full Cytogenetic studies in triploid and tetraploid hybrids of Turnera krapovickasii, T. scabra and T. subulata (Passifloraceae, Turneroideae).
title_fullStr Cytogenetic studies in triploid and tetraploid hybrids of Turnera krapovickasii, T. scabra and T. subulata (Passifloraceae, Turneroideae).
title_full_unstemmed Cytogenetic studies in triploid and tetraploid hybrids of Turnera krapovickasii, T. scabra and T. subulata (Passifloraceae, Turneroideae).
title_sort cytogenetic studies in triploid and tetraploid hybrids of turnera krapovickasii, t. scabra and t. subulata (passifloraceae, turneroideae).
description Cytogenetic studies in triploid and tetraploid hybrids of Turnera krapovickasii, T. scabra and T. subulata (Passifloraceae, Turneroideae). In order to investigate the genomic relationships among species of series Turnera (x= 5), a controlled crossing program was performed and yielded numerous hybrids. Among the yellow flowered species of series Turnera, T. krapovickasii, T. scabra and T. subulata have diploid and autotetraploid cytotypes. So far, the degree of reproductive isolation between diploids and autotetraploids, and the degree of genomic affinity at tetraploid level are unknown. In this study, we present the results of the cytogenetic analysis of triploid (2n=3x=15) intraspecific hybrids of T. krapovickasii and T. scabra and tetraploid (2n=4x=20) (2n=4x=20) T. krapovickasii × T. scabra and T. subulata × T. scabra hybrids. In the triploid hybrids we found cells with 1 to 5 trivalents and the pollen viability was 11.4% - 15.2%. In the tetraploid hybrids we found cells with 1 to 5 quadrivalents and the pollen viability was 76% - 87.97%. The results of this work revealed that the reproductive isolation between diploids and tetraploids is incomplete, and that the triploid hybrids are not completely steriles. Likewise, the cytogenetic analysis of the interspecific hybrids evidenced that the genomes of T. krapovickasii, T. scabra and T. subulata display more affinity at tetraploid level than at diploid level.
publisher Sociedad Argentina de Botánica
publishDate 2017
url https://revistas.unc.edu.ar/index.php/BSAB/article/view/18858
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first_indexed 2022-08-20T01:20:54Z
last_indexed 2022-08-20T01:20:54Z
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