Natural parthenocarpy in tomato. II. - Study of a varietal collection

• Main Author: Philouze, J.
• Other Authors: Station d'amélioration des plantes maraîchères, Institut National de la Recherche Agronomique (INRA)
• Format: Article in Journal/Newspaper
• Language: French
• Published: HAL CCSD 1985
• Subjects: [SDV.SA]Life Sciences [q-bio]/Agricultural sciences; Arctic
• Online Access: https://hal.inrae.fr/hal-02728896; https://hal.inrae.fr/hal-02728896/document; https://hal.inrae.fr/hal-02728896/file/78134_20090209091232116_1.pdf

Ten varieties were studied in order to estimate their capacity for natural parthenocarpy, in comparison with a control variety, « Monalbo », which is not parthenocarpic. Four experiments were carried out in spring cultivation under a heated glasshouse, the flowering taking place in March and April. Two treatments were used : on the one hand, emasculation of the flowers, not followed by pollination on the other hand, pollination, either hand pollination after emasculation, or open pollination without emasculation. Comparisons were made between the percentages of fruit set and the average fruit weights for the 2 treatments the correlation between the fruit weight and the number of seeds was calculated for the treatments with pollination observations were made on the earliness and the speed of parthenocarpic development of the ovary for the treatment without pollination, and on the external appearance of the fruits. These criteria were used to classify the varieties according to their capacity for parthenocarpy : - marked capacity for parthenocarpy : "Severianin", "Montfavet 191" and "75/59" - relatively limited capacity for parthenocarpy : "Pridneprovskij", "Earlinorth", "Parteno", "Oregon T 5-4", "Lyconorma" and "Lycoprea" - little or no capacity for parthenocarpy : "Sub-Arctic Plenty" and "Monalbo". L’étude a porté sur 10 variétés pour juger de leur aptitude à la parthénocarpie naturelle, ainsi que sur une variété témoin non parthénocarpique, « Monalbo ». Quatre essais ont été réalisés en culture de printemps sous serre verre chauffée, avec floraison en mars-avril. Deux traitements ont été appliqués : d’une part castration des fleurs, non suivie de pollinisation d’autre part pollinisation, soit manuelle après castration, soit naturelle sans castration. On a effectué l’étude comparée des pourcentages de nouaison et des poids des fruits à la suite des 2 types de traitements, l’étude de la corrélation entre le poids des fruits et leur nombre de graines à la suite des traitements avec pollinisation, ...