Genetic Composition of the Ornamental Grape Roger’s Red

Dangl, Gerald S.; Raiche, Roger; Sim, S. T.; Yang, Judy; Golino, Deborah A.

doi:10.5344/ajev.2010.61.2.266

Cited by 5 publications

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in opposition to these traits, growers have eliminated these plants because they are frequently less vigorous and/or unprofitable. Nevertheless, due to the visual attractiveness of 'Variegada' and 'Steck' as well as their robust growth, these may be used as ornamental grapevines in the same way as the 'Southern Home' hybrid grapevine with its deep-cut sinuses leaf shape resembling maple leaves (Mortensen et al, 1994), the 'Roger's Red' grapevine with scarlet-red fall foliage and edible tasty berries (Dangl et al, 2010) as well as Vitis coignetiae, the Crimson Glory grapevine (Lawo et al, 2013).…”

Section: Results Results Resultsmentioning

confidence: 99%

Meiotic behavior of two grapevine somatic mutants with ornamental potential

Pierozzi

Moura

2023

Not Bot Horti Agrobo

View full text Add to dashboard Cite

‘Niagara Steck’ and ‘Niagara Variegada’ are two grapevine varieties that arose spontaneously as somatic mutants of ‘Niagara Rosada’. Berries characterize ‘Niagara Steck’ at young stages exhibiting a remarkable brown reticulated structure on the epidermis which develops into a brown-bronze russet-like structure as the berries ripe. The mature berries have strongly acidic flesh. ‘Niagara Variegada’ shows notable variegation in leaves and berries. Meiotic studies were carried out to ascertain if the mutant phenotypes could be related to any change in chromosome number, structure or other irregularity. Floral buds of both varieties at different developmental stages were collected and fixed for cytological analyses. Chromosome counts at diakinesis/metaphase I showed n=19 bivalents for both varieties. Univalent, trivalent, tetravalent chromosomes or chain configuration were not recorded ruling out the possibility of any alteration in the chromosome number or structure in both mutant varieties. However, low percentages of meiotic irregularities were recorded such as chromosome stickiness, laggards, non-oriented chromosomes, precocious chromosome segregation, tetrads with one microcyte, microspore fusion, and tetrad degeneration. The total percentage of abnormalities was higher in ‘Niagara Variegada’ (19.68%) than in ‘Niagara Steck’ (14.40%) which may have contributed to a lower percentage of pollen fertility (79.80%) when compared to ‘Steck’ (90.74%). The aforementioned varieties can be propagated by hardwood cuttings and constitute an interesting option for ornamentation of home backyards, patios, and gardens with the advantage that ‘Niagara Variegada’ bearing sweet edible berries.

show abstract

Section: Results Results Resultsmentioning

confidence: 99%

Meiotic behavior of two grapevine somatic mutants with ornamental potential

Pierozzi

Moura

2023

Not Bot Horti Agrobo

View full text Add to dashboard Cite

show abstract

Hybridization of cultivated Vitis vinifera with wild V. californica and V. girdiana in California

Dangl

Mendum

Yang

et al. 2015

Ecology and Evolution

View full text Add to dashboard Cite

Hybridization of introduced domesticates and closely related natives is well documented in annual crops. The widespread introduction of the domesticated grapevine, Vitis vinifera, into California where it overlaps with two native congenerics, with which it is interfertile, provides opportunity to investigate hybridization between woody perennials. Although geographically widespread, the introduction over the past two centuries has been limited to a few elite clonal cultivars, providing a unique opportunity to study the effects of hybridization on the native species. The amount of hybridization with V. vinifera and the genetic diversity of wild‐growing Vitis californica and Vitis girdiana were examined using nineteen microsatellite markers. STRUCTURE analysis was used to define hybrid and introgressed individuals and to analyze genetic structure of the native species. FAMOZ software was used to identify which V. vinifera cultivars served as parents of F 1 hybrids. The three species were clearly distinguished by STRUCTURE analysis. Thirty percent of 119 V. californica vines were hybrids. The domesticated parent was identified for 16 F 1 hybrid vines; the original California cultivar, ‘Mission’, was the parent of eight. Backcrosses were also found, showing introgression into subsequent generations. Similar results were obtained for a small sample of V. girdiana. Removing hybrids greatly reduced the genetic variation of the presumed pure species, among which there was essentially no genetic structure. Limited genetic variability indicates the California natives may be threatened by genetic erosion. The discovery of F 1 hybrids of ‘Mission’, a cultivar not grown in the areas for ~100 years, suggests long generation times for wild vines that, often, grow into expansive liana and propagate by layering, all factors that limit recruitment in populations already disjunct by habitat lose. Hermaphroditic flowers and fruit that is more attractive to birds may favor the production of backcross seed and establishment of introgressed individuals.

show abstract