Estudios citogenéticos en híbridos triploides y tetraploides de Turnera krapovickasii, T. scabra y T. subulata (Passifloraceae, Turneroideae).

IF 0.6 4区生物学 Q4 PLANT SCIENCES Boletin De La Sociedad Argentina De Botanica Pub Date : 2017-12-15 DOI:10.31055/1851.2372.V52.N4.18858

Aveliano Fernández, S. A. Fernández, Ivana Evelìn Kovalsky, V. S. Neffa

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引用次数: 1

Abstract

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.

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马齿苋、马齿苋和马齿苋三倍体和四倍体杂种的细胞遗传学研究。为了研究Turnera系列(x= 5)种间的基因组关系，进行了一项控制杂交程序，并获得了许多杂交种。黄花黄属植物中，黄花黄属植物有二倍体和同源四倍体细胞型。到目前为止，二倍体和同源四倍体之间的生殖隔离程度以及四倍体水平上的基因组亲和程度尚不清楚。本文报道了三倍体(2n=3x=15)和四倍体(2n=4x=20) (2n=4x=20) krapovickasii × T. scabra和T. subulata × T. scabra的种内杂种细胞遗传学分析结果。在三倍体杂种中，我们发现含有1 ~ 5个三价体的细胞，花粉存活率为11.4% ~ 15.2%。在四倍体杂交种中，有1 ~ 5个四分体，花粉活力为76% ~ 87.97%。研究结果表明，二倍体和四倍体之间的生殖隔离是不完全的，三倍体杂种也不是完全不育的。同样，种间杂交的细胞遗传学分析也证明，克拉维卡氏体、黄斑氏体和扁斑氏体的基因组在四倍体水平上的亲和性高于二倍体水平。

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来源期刊

Boletin De La Sociedad Argentina De Botanica PLANT SCIENCES-

CiteScore

1.00

自引率

33.30%

发文量

审稿时长

>12 weeks

期刊介绍： Bol. Soc. Argent. Bot. publishes original scientific works from the whole spectrum of Plant Biology (structure, anatomy, development, physiology, cytology, genetics, evolution, ecology, paleobotany, palynology, ethnobotany, etc.) in the diverse vegetable organisms and related groups (mycology, ficology, lichenology, briology, etc.), both in basic and applied aspects. Taxonomic works (of systematics, phylogeny, monographs, revisions, lectotypifications, nomenclatural acts, descriptions of taxa), phytogeographic and phytosociological works (survey and classification of vegetation at different spatial scales and without restriction of methodological approaches) are considered for publication. Contributions that address complete phytogeographic units or sub-units and those that fill gaps in knowledge of vegetation in little-known territories are especially welcome. Extensions of geographical areas are published only when it comes to new citations for a country. Checklists and lists of annotated plants are not published. Articles submitted for publication must be original and must not have been submitted to another publisher or previously published (print or electronic format). Submissions of papers already published in another language will not be accepted (autoplagio for translation).