Variability and correlation of some traits of yield structure in winter rye
Tadeusz Śmiałowski
zhsmialo@cyf-kr.edu.plZakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział Kraków (Poland)
Stanisław Węgrzyn
Zakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział Kraków (Poland)
Abstract
The variability, heritability, and coefficients of phenotypic (rP) and genotypic (rG) correlation between 12 traits in winter rye were calculated from the results of breeding experiments with 154 varieties, strains and hybrids carried out the in years 1998–2000 in 7 localities: Choryń, Dańków, Laski, Sobiejuchy, Wierzenica, Radzików and Smolice. The estimated traits were following: grain yield, 1000 grain yield, test weight, winterhardiness, heading date, plant height, pollen fertility, uniformity, lodging, brown rust resistance, falling number and protein content. The mean value, coefficient of variability (CV), coefficient of heritability (H) and coefficients of phenotypic (rP) and genotypic (rG) correlation were calculated for each trait. The statistic analysis showed that yield of the investigated rye forms was rather stable and amounted about 70 dt/ha. Some traits showed very high-level of variability. The values of CV for pollen fertility varied from 33,6% to 41,4%, for lodging — 22,1% to 29,8%, and for falling number — 23,1% to 40,9%. Only few rP and rG values were highly significant. The highest positive values of correlation coefficient were found between plant height and pollen fertility (rP = 0,33 to 0,67), and negative significant values of correlation between grain yield per plot and pollen fertility (rP = -0,37 to -0,75), and between uniformity and pollen fertility (rP = -0,51 to -0,73). The values of coefficients of genotypic correlations were higher than those of phenotypic correlation. It signified that the observed interrelationships resulted mainly from genetic factors and to less extent from environmental factors.
Keywords:
coefficient of variability, coefficient of correlation phenotypic and genotypic, heritability, winter ryeReferences
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Authors
Tadeusz Śmiałowskizhsmialo@cyf-kr.edu.pl
Zakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział Kraków Poland
Authors
Stanisław WęgrzynZakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział Kraków Poland
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