Heritability and interrelationships of yield and certain agronomic traits in winter wheat (Triticum aestivum L.)
Stanisław Węgrzyn
s.wegrzyn@ihar.edu.plInstytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie (Poland)
Tadeusz Wojas
Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie (Poland)
Tadeusz Śmiałowski
Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie (Poland)
Abstract
Basing on the results of breeding trials with winter wheat strains the heritability and interrelationships of such traits as: grain yield, 1000 kernel weight, number of days from 1st May to heading, plant height and resistance to fungal diseases (powdery mildew, leaf rust, leaf and ear septorias). All the traits under study, except grain yield and resistance to leaf and ear septorias, showed high heritability coefficient, ranging from 0.78 to 0.94. For the last three mentioned traits this coefficient amounted from 0.43 to 0.56 (the lowest value refers to grain yield). Correlation coefficients, both phenotypic and genotypic, attained medium to low values, although in several cases they were statistically significant. Genotypic correlation values exceeded, as a rule, those of phenotypic correlation; that indicated at the dependence of phenotypic correlation on plant genotype. The highest positive correlations were shown for the following pairs of traits: resistance to leaf septoria and number of days to heading, resistance to leaf septoria and resistance to ear septoria, grain yield and 1000 kernel weight, resistance to ear septoria and plant height (the latter was disadvantageous to breeding). On the other hand, correlation between yield and number of days to heading was negative, i.e. earlier forms had higher grain yield.
Keywords:
agronomic traits, heritability, interrelationships, winter wheatReferences
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Authors
Stanisław Węgrzyns.wegrzyn@ihar.edu.pl
Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie Poland
Authors
Tadeusz WojasInstytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie Poland
Authors
Tadeusz ŚmiałowskiInstytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie Poland
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