How has the consistency of the Common catalogue of varieties of vegetable species changed in the last ten years?

Santamaria, Pietro; Signore, Angelo

doi:10.1016/j.scienta.2020.109805

Cited by 13 publications

(8 citation statements)

References 28 publications

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“…Heterosis is not exploited knowingly for traits other than production stability such as fruit size or shape homogeneity [ 7 ], as heterosis remains limited for yield. In 2018, about 89% of tomato varieties were commercialized as F1 hybrids (‘HF1’) in Europe [ 8 ]. Tomato organoleptic quality is the sum of fruit physical (aspect and texture) and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Inheritance of Secondary Metabolites and Gene Expression Related to Tomato Fruit Quality

Bineau

Rambla

Duboscq

et al. 2022

IJMS

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Flavour and nutritional quality are important goals for tomato breeders. This study aimed to shed light upon transgressive behaviors for fruit metabolic content. We studied the metabolic contents of 44 volatile organic compounds (VOCs), 18 polyphenolics, together with transcriptome profiles in a factorial design comprising six parental lines and their 14 F1 hybrids (HF1) among which were five pairs of reciprocal HF1. After cluster analyses of the metabolome dataset and co-expression network construction of the transcriptome dataset, we characterized the mode of inheritance of each component. Both overall and per-cross mode of inheritance analyses revealed as many additive and non-additive modes of inheritance with few reciprocal effects. Up to 66% of metabolites displayed transgressions in a HF1 relative to parental values. Analysis of the modes of inheritance of metabolites revealed that: (i) transgressions were mostly of a single type whichever the cross and poorly correlated to the genetic distance between parental lines; (ii) modes of inheritance were scarcely consistent between the 14 crosses but metabolites belonging to the same cluster displayed similar modes of inheritance for a given cross. Integrating metabolome, transcriptome and modes of inheritance analyses suggested a few candidate genes that may drive important changes in fruit VOC contents.

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Section: Introductionmentioning

confidence: 99%

Inheritance of Secondary Metabolites and Gene Expression Related to Tomato Fruit Quality

Bineau

Rambla

Duboscq

et al. 2022

IJMS

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“…Although tremendous improvement has been achieved for QTL identification on homozygous plant material [ 20 ], breeders still need insight into the flavour improvement they can expect from these QTLs in their F1 hybrids, as no study has yet been undertaken on the evolution of flavour-related traits within heterozygous plant material. In the European Union, 89% of registered tomato varieties were hybrids in 2018 [ 24 ]. Frequent breeding programs include an ‘agronomic’ line that accumulates desirable disease resistance genes and agronomical value, and a line with good organoleptic quality [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Breeding Tomato Hybrids for Flavour: Comparison of GWAS Results Obtained on Lines and F1 Hybrids

Bineau

Rambla

Priego-Cubero

et al. 2021

Genes

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Tomato flavour is an important goal for breeders. Volatile organic compounds (VOCs) are major determinants of tomato flavour. Although most tomato varieties for fresh market are F1 hybrids, most studies on the genetic control of flavour-related traits are performed on lines. We quantified 46 VOCs in a panel of 121 small fruited lines and in a test cross panel of 165 hybrids (the previous panel plus 44 elite cherry tomato lines crossed with a common line). High and consistent heritabilities were assessed for most VOCs in the two panels, and 65% of VOC contents were strongly correlated between lines and hybrids. Additivity was observed for most VOCs. We performed genome wide association studies (GWAS) on the two panels separately, along with a third GWAS on the test cross subset carrying only F1 hybrids corresponding to the line panel. We identified 205, 183 and 138 associations, respectively. We identified numerous overlapping associations for VOCs belonging to the same metabolic pathway within each panel; we focused on seven chromosome regions with clusters of associations simultaneously involved in several key VOCs for tomato aroma. The study highlighted the benefit of testcross panels to create tasty F1 hybrid varieties.

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“…In Benin, the seed law includes provisions for the registration of farmers' varieties on a specialized register but implementing measures have not yet been adopted [46]. In the European Union, more than a decade of experience with the registration of landraces and amateur varieties has allowed several countries to establish well-functioning registration systems and resulted in the introduction of numerous conservation varieties in the European common catalogue of commercial varieties [47]. However, many practitioners consider that national seed laws regarding conservation and amateur varieties are still restrictive and require further revisions [48].…”

Section: Discussionmentioning

confidence: 99%

Advances in the Registration of Farmers’ Varieties: Four Cases from the Global South

et al. 2021

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Over the last few decades, there has been a growing appreciation of crop varieties developed by local farmers, commonly referred to as farmers’ varieties. These varieties often have attractive characteristics for both producers and consumers, such as adaptability to harsh environmental conditions and high nutritional values. Yet they are usually not sold in formal markets, and tend to be limited to farmers’ seed systems. This is partially due to national seed laws that, in an effort to guarantee good quality seed of uniform and stable varieties, create obstacles for farmers’ varieties to reach the market. This article describes the experiences of four countries—Bolivia, Laos, Nepal and Zimbabwe—that are developing alternative variety registration systems for farmers’ varieties. Most of these cases have never been documented before. The cases present the main drivers behind and approaches to the registration of farmers’ varieties in different legal contexts and at different stages of development. We conclude that farmers’ variety registration systems can generate benefits including faster and cheaper variety releases, improved farmer incomes, and a larger diversity of well-adapted varieties in the market—but some important issues are still to be resolved.

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How has the consistency of the Common catalogue of varieties of vegetable species changed in the last ten years?

Cited by 13 publications

References 28 publications

Inheritance of Secondary Metabolites and Gene Expression Related to Tomato Fruit Quality

Inheritance of Secondary Metabolites and Gene Expression Related to Tomato Fruit Quality

Breeding Tomato Hybrids for Flavour: Comparison of GWAS Results Obtained on Lines and F1 Hybrids

Advances in the Registration of Farmers’ Varieties: Four Cases from the Global South

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