terclim by ICS banner
IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2023 9 Comparison of genotype x environment interaction of clonal and polyclonal grapevine selected materials

Comparison of genotype x environment interaction of clonal and polyclonal grapevine selected materials

Abstract

Context and purpose of the study – Conserving and exploring the intra-varietal diversity of ancient varieties is essential to foster their use in the future, preserving the traditions and history of ancient growing regions and their wines. The conservation of representative samples of ancient varieties and the utilization of intra-varietal variability through polyclonal selection are advisable strategies to save and promote the cultivation of each variety, respectively. These processes allow perform several types of polyclonal selection according to different criteria over time, to face the demands of producers, consumers, and climate changes; and to ensure a stable behaviour of the variety among the environments where it is grown. The objective of this study is to demonstrate the higher flexibility of selection criteria and precision associated with the genetic gains of polyclonal selection as well as its higher stability in different environments.

Material and methods  – Linear mixed models were fitted to the data of yield and important quality traits of the must obtained in several multi-environmental field trials established according to randomized complete blocks and resolvable row-column designs. Some methodologies for the comparison between clonal and polyclonal selections are used. Particularly, methods to evaluate and demonstrate the more stable behaviour of the polyclonal material over environments are considered, using a measure based on the variance of the values of the empirical best linear unbiased predictors (EBLUPs) of G×E interaction effects of the polyclonal group across environments and biplots for the interpretation of genotype by environment (G×E) interaction.

Results – The results showed the higher precision of the genetic gains of the polyclonal selected group. When compared to individual clones, the lower sensitivity to G×E interaction of the polyclonal material was always observed. The polyclonal selection of ancient grapevine varieties showed to be a powerful tool to face current and future challenges of viticulture.

DOI:

Publication date: June 20, 2023

Issue: GiESCO 2023

Type: Article

Authors

Elsa GONÇALVES1*, Antero MARTINS1

1LEAF—Linking Landscape, Environment, Agriculture and Food—Research Center, Associated Laboratory TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, Lisboa, Portugal

Contact the author*

Keywords

intra-varietal diversity, grapevine conservation, polyclonal selection

Tags

GiESCO | GIESCO 2023 | IVES Conference Series

Citation

Related articles…

VitExpress, an open interactive transcriptomic platform for grapevine

[lwp_divi_breadcrumbs home_text="IVES" use_before_icon="on" before_icon="||divi||400" module_id="publication-ariane" _builder_version="4.20.4" _module_preset="default" module_text_align="center" module_font_size="16px" text_orientation="center"...

Haplotype-resolved genome assemblies of Chasselas and Ugni Blanc

Haplotype-resolved genome assemblies were produced for Chasselas and Ugni Blanc, two heterozygous real-field genetic pool Vitis vinifera cultivars by combining high-fidelity long-read sequencing (HiFi) and high‐throughput chromosome conformation capture (Hi-C). The telomere-to-telomere full coverage of the chromosomes allowed us to assemble separately the two haplo-genomes of both cultivars and revealed structural variations between the two haplotypes of a given cultivar.

Preliminary studies on polyphenol assessment by Fourier transform-near infrared spectroscopy (FT-NIR) in grape berries

NIR spectroscopy has widely been tested in viticulture as powerful alternative to traditional analytical methods in the field of quality evaluation. NIR instruments have been used for assessing must and wine quality features in several works, but little information regarding their application on whole berries for polyphenol determination is available.

Evaluation of methods used for the isolation and characterization of grape skin and seed, and wine tannins

Validation of the phloroglucinolysis and RP-HPLC method showed selectivity and repeatability within acceptable limits for all investigated matrices. Recovery of polymeric phenols by SPE was also acceptable.

Identification and formation kinetic study of phenolic compounds-volatile thiols adducts by enzymatic oxidation

By using HPLC-ESI-MS, 1H, 13C and 2D NMR, new addition products between catechin, epicatechin, caftaric acid and 3SH were characterized. Caftaric acid formed more rapidly adducts with 3SH than catechin and epicatechin in the absence of other nucleophiles.