terclim by ICS banner
IVES 9 IVES Conference Series 9 Phenotypical impact of a floral somatic mutation in the cultivar Listán Prieto

Phenotypical impact of a floral somatic mutation in the cultivar Listán Prieto

Abstract

The accession Criolla Chica Nº2 (CCN2) is catalogued as a floral mutation of cultivar Criolla Chica (synonym for cv. Listán Prieto). Contrary to what is observed in hermaphrodite-cultivated varieties like Criolla Chica, CCN2 exhibits a prevalence of masculinized flowers. Aiming to study the incidence and phenotypical implications of this mutation, CCN2 plants were deeply studied using Criolla Chica ‘Ballista’ (CCBA) as control plants. For each CCN2 plant, two inflorescences per shoot were sampled and segmented into proximal, mid and distal positions, relative to the pedicel. Flowers were observed through magnifying lens and classified according to OIV151 descriptor. CCN2 exhibited flowers of type 1 (masculinized) and 2 (intermediate), while CCBA exhibited only type 3 (hermaphrodite) flowers, as expected. CCN2 averaged more than 55% of type 1 flowers per cluster, which were predominant in the proximal position (63%), gradually diminishing towards distal positions. This distribution correlates with low fruit set rates towards proximal positions. In CCN2, a high percentage of inflorescence abscission per plant (avg. 50%) was observed, starting in stage EL-27. This phenomenon was not observed in CCBA. Additionally, histological sections of flowers at different developmental stages were performed. In type 1 flowers of CCN2, style and stigma tissues exhibited null development with atrophied ovules; these structures were present although poorly developed in type 2 flowers, potentially producing the few berries per cluster observed at harvest. Overall, the studied floral mutation identified in CCN2, strongly affects the development of female reproductive tissues and organs, drastically hindering fruit-set rate and cluster production.

DOI:

Publication date: June 14, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Tomás Oroño1*, Rocío Torres2, Agustín Sanguinetti3, Claudio Muñoz1,4, Sebastián Gomez-Talquenca2, Luciano Calderón1, Diego Lijavetzky1

1Instituto de Biología Agrícola de Mendoza (IBAM, CONICET-UNCuyo), Almirante Brown 500, M5528AHB. Chacras de Coria, Mendoza, Argentina
2EEA Mendoza INTA, San Martin 3853, 5507, Luján de Cuyo, Mendoza, Argentina.
3Universidad de Buenos Aires, Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA-CONICET).
4Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo. Almirante, Brown 500, M5528AHB. Chacras de Coria, Mendoza, Argentina

Contact the author*

Keywords

floral mutation, masculinization, inflorescence abortion, fruit set, histological analysis

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Effects of winemaking practices on Pinot blanc quality

Two winemaking processes for Pinot blanc were investigated following the chemical and sensory profiles for 12 months, aiming at: i) determining the chemical and sensory profiles

Physiological response to drought and heat stress in the leaves of table grape varieties

Increasingly pronounced climate changes, including prolonged drought periods, pose a significant challenge to the cultivation of table grape varieties.

Effect of different packaging materials on table grape quality preservation during cold storage

During cold storage, grapes undergo changes that affect their visual, mechanical, and organoleptic properties, potentially impacting quality and negatively influencing consumer acceptance. Key parameters include uniform color, crunchiness, and flesh consistency. We evaluated the influence of two distinct packaging methods on the chromatic characteristics, hardness, and pedicel detachment resistance of fourteen new seedless white and red grape varieties during cold storage. These factors are crucial for maintaining the quality of the product and extending its shelf-life. The novel grape varieties were obtained through a breeding program at CREA-VE of Turi, Southern Italy.

Electromagnetic conductivity mapping and harvest zoning: deciphering relationships between soil and wine quality

Using electromagnetic conductivity mapping and GIS technology, we identified two unique soil zones within a 0.8-hectare Cabernet Franc block in central Virginia, USA.

Activation of retrotransposition in grapevine

Retrotransposons, particularly of the Ty-Copia and Ty-Gypsy superfamilies, represent the most abundant and widespread transposons in many plant genomes. Grapevine is no exception and it is clear that these mobile elements have played a major role in the evolution of Vitaceae genomes. While speculation abounds around the possible role of transposons in plant genomes, outside of the rather obvious involvement of retrotransposition in fueling genome expansion, there is little clarity of the actual role these elements have in both developing new genetic variation and in modulating epigenetic responses within genomes to changing climate. To this end we have been exploring de-novo assembled Sauvignon blanc and Pinot noir genomes with a view to catalogue retrotransposon loci to determine the structural intactness and thus age of insertion variation across a small number of clonal linages of these 2 varietals in an attempt to identify ‘live’ TE loci.