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ISHS Acta Horticulturae 200: II International Symposium on Processing Tomatoes, XXII IHC

GENETICS AND PHYSIOLOGY OF PARTHENOCARPY IN TOMATO

Authors:   A.A. Hassan, M.M. Marghany, W.L. Sims
DOI:   10.17660/ActaHortic.1987.200.16
Abstract:
Parthenocarpic tomatoes (Lycpersicon esculentum Mill.) cv. Severlanin was significantly higher in early yield and percentage fruit set under cold weather conditions than other genotypes evaluated; viz, Floradade, Peto 86, UCX 78 W 29 and VF 145-B-7879.

Genetic studies were conducted on parents, F1, F2 and backcross (BC) plants of the crosses Severlanin x UC 82 and Severianin x VF 145-B-7879 and their reciprocals. Characters studied were percentage fruit set and percentage parthenocarpic fruits produced under cold weather conditions. Both characters were found to be controlled by a single recessive gene which is basically the gene responsible for parthenocarpy.

Gibberellins (GAs) content of flower ovaries was nearly 3 times in cv. Severianin as in cvs UC 82 or VF 145-B-7879. No notable differences were observed between F1 plants and their seeded parents or between reciprocal hybrids. These results were in accordance with the genetic studies and pointed to the importance of a high GAs content in flower ovaries for parthenocarpic fruit set in tomatoes.

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