Analysis of correlation and path coefficients in evaluation of relationships between grain yield and its components of two spring barley cultivars
Dariusz Gozdowski
dariusz_gozdowski@sggw.edu.plKatedra Doświadczalnictwa i Bioinformatyki, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie (Poland)
Wiesław Mądry
Katedra Doświadczalnictwa i Bioinformatyki, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie (Poland)
Zdzisław Wyszyński
Katedra Agronomii, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie (Poland)
Abstract
A field experiment with two spring barley cultivars (Rasbet — with hulled grain and Rastik with hulless grain) was conducted at the Experimental Station of Warsaw Agricultural University in Chylice in the years 1999–2002. Correlation coefficient analysis and path coefficients analysis was applied for evaluation of grain yield determination by its components. The results prove the highest direct effect of number of pikes per 1 m2 on grain yield for both cultivars. Path coefficient was equal to 0.909 for Rastik (with hulless grain) and was higher than for Rasbet (0.788). The other two components had small influence on grain yield for both cultivars. Slightly smaller effect was caused by number of kernels per spike, compared with the effect of weight of thousand grains. Values of path coefficients for number of kernels per spike were similar for both cultivars and were equal to 0.537 and 0.494 (Rasbet and Rastik respectively) and for weight of thousand grains 0.441 and 0.442 (respectively for Rasbet and Rastik). Indirect effects of yield components were relatively small, but slightly higher for the hulless cultivar.
Keywords:
correlation coefficients, grain yield, path analysis, spring barley, yield componentsReferences
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Authors
Dariusz Gozdowskidariusz_gozdowski@sggw.edu.pl
Katedra Doświadczalnictwa i Bioinformatyki, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie Poland
Authors
Wiesław MądryKatedra Doświadczalnictwa i Bioinformatyki, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie Poland
Authors
Zdzisław WyszyńskiKatedra Agronomii, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie Poland
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