The path-coefficient analysis of yield structure parameters in spring oat
Tadeusz Śmiałowski
zhsmialo@cyf-kr.edu.plZakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie (Poland)
Stanisław Węgrzyn
Zakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie (Poland)
Abstract
The aim of the study was to estimate direct and indirect effects of six traits: date of heading, plant height, resistance to lodging and to crown rust, 1000 grain weight and content of hull on grain yield per plot in strains and cultivars of spring oat (Avena sativa) investigated in field trials in 1999 and 2000. The study was carried out on 50 forms (25 each year) in 4 localities. The statistical analysis comprised calculation of coefficient of variability, phenotypic and genotypic correlations and path-coefficient analysis of six traits and grain yield per plot. The genotypic correlation between grain yield and crown rust resistance was positive and highly significant in the both years of study (rG(1999) = 0.93** and rG(2000) = 0.64**). Path-coefficient analysis showed very strong direct effect of crown rust on grain yield (P37(1999) = 1.439** and P37(2000) = 0.607**). A negative genotypic correlation existed between date of heading and grain yield (rG(1999) = -0.73** and rG(2000) = -0.48**), and also direct effects on yield were negative in the both years of study (P(1999) = -0.667**, and P(2000) = -0.819**).
Keywords:
genotypic correlation, path-analysis, spring oat, yield structureReferences
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Authors
Tadeusz Śmiałowskizhsmialo@cyf-kr.edu.pl
Zakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie Poland
Authors
Stanisław WęgrzynZakład Roślin Zbożowych, Instytut Hodowli i Aklimatyzacji Roślin, Oddział w Krakowie Poland
Statistics
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