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Low temperature tolerance of French beans (Phaseolus vulgaris L.)

Roman Hołubowicz, Wiesław Legutko

Department of Seed Science and Technology
Poznań Agricultural University
Baranowo, 62-081 PrzeĽmierowo, Poland

In the years 1992-1994 investigations were carried out on the possibility of increasing low temperature tolerance of French beans (Phaseolus vulgaris L.). In the breeding studies the American cold-tolerant French bean line NY 5-161 from the Agricultural Experimental Station in Geneva (New York State) was used at Cornell University. This line was crossed with 4 dwarf French bean cultivars: Coréne, Silvert, Valja, and Sara 5. Three-week-old seedlings of the F2 generation were then tested for cold tolerance in artificial conditions using a growth chamber. The plants were exposed for 30 days at 16°C. The low temperature tolerance was evaluated on the basis of plant morphology, vigour, and state of health. From the combination Silvert × NY 5-161 and Sara 5 × NY 5-161, 8 and 17 individuals, respectively, were selected for further breeding studies. The breeding material obtained grew strongly, which in the present day trends in bean breeding, must be considered a disadvantage. The F4 generation plants obtained from crossing the line NY 5-161 with the cultivars Silvert and Sara 5 did not show the expected cold tolerance. Parallelly, a search was carried out for a new donor of French bean cold tolerance. In the years 1993-1994 24 French bean cultivars were investigated. The plants were tested in a growth chamber for 14 days at 10°C. The cultivars Sara 5, Othello, Acapulco, and Triton had a cold tolerance level similar to the line NY 5-161. These cultivars will be further investigated.

Hołubowicz R., Legutko W., 1995. Low temperature tolerance of French beans (Phaseolus vulgaris L.). Folia Horticulturae 7/1: 27-36.