Abstract
Chromosome studies were performed in V. champinii, V. cinerea, V. girdiana, V. labrusca, V. rotundifolia, V. rupestris and V. vinifera with the purpose of species characterization using chromosome morphometric data and NOR banding. A median ideogram was obtained for each species. The karyotype formula obtained varied from 7m + 12sm to 9m + 11sm. The species showed moderate chromosome asymmetry values according to TF% form, Stebbins, Romero Zarco and Paszko indices. V. champinii and V. girdiana were apart from the other species by CVcl and CVci graphic representation and also formed a group apart in the dendrogram based on Euclidian distances. The chromosome pair number 3 harbors the secondary constriction and a satellite segment in all species analyzed with Giemsa staining and it may be the same observed after NOR banding technique. It seems that the process of speciation in the North American Euvitis species studied involved some discrete changes in chromosome morphometry which have been reflected in the asymmetry index.
Highlights
Vitis L. (Vitaceae) is an economical important genus of wide geographical distribution over lands of the North Hemisphere (North American, European and Asiatic groups)
Vitis classification is still a controversial subject, especially concerning American species, where number of valid species varies according to the author (SOUSA 1996; ALVARENGA et al, 1998)
The genus encompasses approximately 60 species which is divided in two sections, Euvitis and Muscadinia according to chromosome number and
Summary
Vitis L. (Vitaceae) is an economical important genus of wide geographical distribution over lands of the North Hemisphere (North American, European and Asiatic groups). The southeast region of North America is especially rich in wild Vitis species (OLMO, 1979). Though not holding the same importance as V. vinifera, some of the wild grape species such as V. rupestris or V. rotundifolia, for instance, have been used as rootstock to select V. vinifera varieties. Vinifera, some of the wild grape species such as V. rupestris or V. rotundifolia, for instance, have been used as rootstock to select V. vinifera varieties Others such as V. labrusca are employed in breeding programs resulting in many cultivars cultivated as table grapes in Brazil or employed in the juice industry (SOUSA, 1996). Vitis classification is still a controversial subject, especially concerning American species, where number of valid species varies according to the author (SOUSA 1996; ALVARENGA et al, 1998). The genus encompasses approximately 60 species which is divided in two sections, Euvitis and Muscadinia according to chromosome number and
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
