Evaluarea diversității genetice a liniilor consangvinizate de porumb din grupa de germoplasmă Lacaune

Abstract

The purpose of research was to estimate the phenotypic and genetic diversity of 14 inbred lines which were classified into the Lacaune germplasm group, including F2, used as indicator line. Phe-notypic diversity was estimated by determining the phenotypic diversity index (idf), calculated based on 28 quantitative and qualitative characters. Genetic diversity was assessed by the mid-parent heterosis (H, %) and SCA constants (ŝij) for grain yield. In the most of cases (98 %), between inbred lines, there was observed a high or medium degree of phenotypic relatedness. The degree of heterosis in related crosses varied from 33,7 to 143,6% has been lower, compared to crosses between unrelated lines (h = 85,2 – 169,0 %), that confirms the belonging of the studied lines to the respective germplasm group. At the non-additive interactions level the most related to the F2 line, are the F2o2, K1, AN615, MKP16 and MV61 inbreds, and the most genetically distant from it are the MV453, MV395 and MV459 lines.

Keywords

• zea mays
• inbred lines
• genetic diversity
• phenotypic diversity
• germplasm groups
• heterosis