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STUDY OF SOME TOMATOES BREEDING LINES FOR DEVELOPMENT OF NEW VARIETIES AND HYBRIDS


PETRE MARIAN BREZEANU, CREOLA BREZEANU, SILVICA AMBĂRUƞ
Vegetable Research and Development Station, Calea Barladului, Street, no. 220, Bacau, Romania, e-mail: brezeanumarian@yahoo.com; creola.brezeanu@yahoo.com; silvia_ambarus@yahoo.com

Issue:

SCSB, Number 1, Volume XXVIII

Section:

Volume 28, No. 1

Abstract:

The preference of farmers is usually influenced by the economic benefits gained by using traditional varieties that are productive but can also survive to environmental adversities. Old, local varieties perfectly adapted to environmental conditions, featured by increased productivity, can represent a starting breeding material. The market request/ preference in terms of taste, flavor, colour, size and shape. Romanian consumers prefer red, big and sweet fruits (high content of soluble solids, uniformity of fruits shape and color, shape index around 1, average weight 150 g fruit, with high lycopene content). The knowledge of the morphological and physiological characteristics of tomato parents is an essential condition for breeding. In the present study, after a careful investigation of the main characteristics, from the field of collection, which included over 250 cultivars, 4 parents, with determined growth (SP +) were promoted. The promotion of parents from the base field to the working field was made on the basis of the genetic stability of the main characteristics pursued in the process of breeding. Four improved lines that met the characteristics that we stabilized over time, using as a comparison the control Unibac variety, within the breeding program carried out at S.C.D.L. Bacau. Biometric measurements and observations were performed at all parents promoted in the field of work, using UPOV criteria as assessment standards. The study has shown that parents who gave the best results by crossing with the analyzing parent proved to be the best at crossover. Compared to the control (Unibac variety), all four homozygous advanced lines achieve total production of over 80 t ha-1. The lines exhibit increased resistance against to the attack of pathogens.

Keywords:

genealogical selection, resistance, productivity, precocity.

Code [ID]:

SCSB201901V28S01A0008 [0005033]

Note:

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