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Frost resistance of ‘Chinese Spring’/‘Cheyenne’ chromosome substitution lines under short‐ and long‐day hardening conditions
Author(s) -
Veisz O. B.,
Sutka J.
Publication year - 1998
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1998.tb01457.x
Subject(s) - frost (temperature) , biology , photoperiodism , horticulture , zoology , materials science , composite material
Investigations were carried out under phytotronic conditions to study the effect of daylength on the frost resistance of a ‘Chinese Spring’/‘Cheyenne’ chromosome substitution series. The frost resistance of the 5A, 7A, 4B, 5B, 1D and 5D lines was significantly better when raised and hardened with long‐day (16 h) rather than short‐day (8h) illumination. The frost resistance‐increasing effect of daylength could be demonstrated after freezing lines 5A and 5D at both ‐ 10°C and ‐12°C. An increase in the duration of illumination in the course of preliminary growth and hardening promoted the development of a higher level of frost resistance. This positive effect was most pronounced for chromosome substitution lines, where the frost resistance was significantly better than that of ‘Chinese Spring’ even with normal daylengths.