Sel’skokhozyaistvennaya Biologiya [Agricultural Biology], 2011, № 1, p. 66-75 UDK 635.649:[631.524.7+631.524.84]:575.113.2 FEATURE OF HETEROSIS IN Capsicum annuum L. IN CONNECTION WITH DEGREE OF IDENTITY OF KEY ALLELES OF ECONOMIC VALUABLE DETERMINANTS 1Transnistria State University, Bioinformatics Research Laboratory, Tiraspol 3300, Transnistria e-mail: otimina@mail.ru O.O. Timina1, A.S. Ryabova2 2 A.P. Ershov Institute of Informatics Systems, RAS, Novosibirsk 630090, Russia e-mail: ryabova.anna@gmail.com Received May 20, 2009 S u m m a r y With the use of parental forms of Capsicum annuum L. (Dobrynya Nikitich, Kolobok, Prometei varieties and also L 48 and L 49 lines) by the regression-cluster analysis the authors revealed the correlation between degree of identity of key alleles of economic valuable determinants and effect of heterosis. <...> It was shown, that for the prognosis of heterosis in the conditions of the film nonheated greenhouse on module of marketable crop the degree of identity alleles in three clusters: fruit’s length—fruit’s index, fruit’s rot and duration of I phenophase—number of cameras in fruit; in the conditions of open ground — identity in the clusters: fruit’s length—fruit’s index, average fruit’s mass—marketable fruit’s mass have key significance. <...> For the forecast of heterosis on mentioned module for both variants of growing the correlation between character and degree of identity of alleles in clusters: fruit’s length—fruit’s index and duration of II phenophase—duration of III phenophase is important. <...> Currently, QTL is considered as the most promising method for detection of polygenic characters (4, 5). <...> The theory of ecology-genetic control of quantitative traits (911, 13) was the basis for introducing the concept of a module – the basic unit describing the structure of a quantitative trait. <...> Five genotypes of sweet pepper (the cultivars Dobrynya Nikitich, Kolobok, Prometei, the lines L 48 and L 49) were subjected to diallel crosses according to the scheme [Чp(p+1)] (non-heated greenhouse, center of the Transnistrian region, 2004). <...> The software Correlation matrices Statistica 6.0 was used to assess correlations between heterosis effects and levels of identity of re-determined alleles manifested in particular environmental conditions, and to perform <...>