Odziedziczalność i korelacje fenotypowe wybranych cech soi w warunkach klimatycznych Polski [Heritability and correlation between selected phenotypical characters of soybean under the climatic conditions of Poland]

Abstract

The variability of characters connected with yield structure in soybean is much more influenced by environmental conditions than the genotype as indicated by heritability coefficients (h²), calculated on the basis of trials performed during several years under the climatic conditions of Poland. The length of the vegetation period, however, is determined predominantly by the genotype since high reproducibility of h² values in different years was found. The heritability coefficients obtained for the agronomic characters of soybean grown in Poland were relatively similar to analogous data from the USA. Phenotypical correlations calculated for the whole group together with correlations between the length of the vegetation period and other characters calculated for individual varieties, provided information on the interrelationship between characters in soybean grown in Poland. This, together with calculated heritability coefficients could be useful for soybean breeding in Poland.