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Inheritance of certain quantitative characters in hybridization between lines from zea mays indentata and zea mays everta subspecies



Inheritance of certain quantitative characters in hybridization between lines from zea mays indentata and zea mays everta subspecies



Genetika i Selektsiya 18(5): 365-373



Investigations have been carried out in 1980-1981 aiming to assess the inheritance of the characters plant height, number of tillers and ears per plant and length of upper ears in F1 crosses between inbred lines of dent and pop maize. It has been found that plant height is inherited overdominantly in the combinations investigated and is accompanied by considerable heterosis effect. Inheritance of the character tillering is partially dominant or overdominant. The values of the heritability coefficient (H2) determining the sources of variation are 0.36 .+-. 0.13 and 0.29 .+-. 0.11 respectively, a fact indicating that environmental conditions have a considerable influence on the performance of the indicator. A low heritability coefficient was observed with respect to number of ears per plant (H2 = 0.001 and 0.006), therefore it can be assumed that the inheritance of this character is not genetically controlled, but is a result of environmental effects. Conclusions reached by this preliminary study show that there exist certain possibilities for developing maize hybrids intended for stage, by crossing dent and pop maize type lines, but further investigations are necessary to assess the optimal conditions which will ensure the pronounced tillering and multi-ear performance of pop maize in the F1 hybrids.

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