Literature cited: Alexandrov   V . Yu . Cells, macromolecule and temperature - L . : Nauka, 1975 . - 329 p . Alexandrov   V . Yu . Reactivity of cells and proteins . - L . : Nauka, 1985 . - 311 c . Bailey N . T . J An introduction to the mathematical theory of genetic linkage . - Oxford, Clarendon press, 1961 . - 298 p .   Dishler V . Yu . Induced recombinogenesis at high plants . - Riga: Zinatne, 1983 . - 222p . Elliot F . Plant breeding of and cytogenetics . - Ì . : Nauka, 1961 . - 241p . Fisher   R . À . Statistical methods for the explorers . - Ì . : Nauka, 1958 . - 520 p . Gavrilenko Ò . À . Influence of temperature on a recombination of tomato . Cytology and Genetics, 1984 . - V . 18, N 5 . - P . 347 - 352 . Kendall Ê . V . , Stuart À . The theory of allocations . - Ì . : Nauka, 1966 . - 587 p . Kuperman F . Ì . Morphophysiology of plants . - Ì . : Higher school, 1973 . - 255 p . Lu B . C . Genetic recombination in Coprinus . IV . A kinetic study of the temperature effect on recombination frequency .   Genetics, 1974 . - V . 78, N2 . - P . 661 - 677 . Lu B . C . , Chiu S . M . Genetic recombination in Coprinus . V . Repair synthesis of deoxyribonucleic acid and its relation to meiotic recombination .   Mol . and Gen . Genet . , 1976 . - V . 147, N2 . - P . 121 - 127 .   Mather Ê . , Jinks, J . Biometric genetics . - Ì . : World, 1985 . - 463 p . Mock J . J . Manipulation of crossing over   with intrinsic and extrinsic factors . Egypt . J . Genet . And Cytol . , 1973, V . 2, N1, P . 158 - 175 . Preygel I . A . (1986) Genetical and statistical analysis of the frequency and spectrum of recombination variability (in Russian) . Ph . D . Thesis, Institute of General Genetics . Moscow . Rokitski P . F . Biological statistics . - Minsk: Higher school, 1967 . - 326 p . Straub J . Untersuchungen zur Physiologie der Meiosis .   Ztschr . Bot . , 1938 . - V . 32 . - S . 225 - 268 .   Urbah V . Ju . Biometric methods . - Ì . : Nauka, 1964 . - 415 p .   Ursul S . V . Heterozygosity of F 1 hybrids and crossing over frequency variation in F 2   in distant and intervarietal crosses of Tomato (in Russian) . Izv . Acad . Science of Moldova, Ser .   Biol . and Khim . Nauk . 1992 . V . 2 P . 31 - 36 .   Wilson Y . J . Chiasma frequency in relation to temperature . Genetica, 1959 . - V . 29, N . 13 . - P . 290 - 303 .   Zhuchenko A . A . Adaptive potential of cultivated plants: genetic and ecological bases . 1988 . Shtiintsa Publishers, Kishinev . 880 p . Zhuchenko A . A . , Korol A . B . Recombination in Evolution and Breeding . 1985 . Nauka, Moscow .   400 p .   Zhuchenko À . À . , Uschapovski I .