African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Analysis of uniformity of new oilseed rape lines (Brassica napus L. subsp. oleifera) using coefficient of variation

Bogna Zawieja1, Jan Bocianowski1*, Tadeusz Łuczkiewicz2 and Katarzyna Gacek3
1Department of Mathematical and Statistical Methods, PoznaÅ„ University of Life Sciences, Wojska Polskiego 28, 60-637 PoznaÅ„, Poland. 2Department of Genetics and Plant Breeding, PoznaÅ„ University of Life Sciences, Dojazd 11, 60-632 PoznaÅ„, Poland. 3Department of Oilseed Crops, Plant Breeding and Acclimatization Institute, National Research Institute, Strzeszynska 36, 60-479 Poznan, Poland.
Email: [email protected]

  •  Accepted: 31 October 2013
  •  Published: 14 November 2013


The aim of this study is to compare the suitability of Bennett’s and Miller’s statistical methods, respectively, for analysis of oilseed rape varietal uniformity. In both methods, coefficient of variation for evaluation of the uniformity of crop varieties was used. In order to test the suitability of the above mentioned statistical methods for analyzing the varietal uniformity in spring oilseed rape, the quantitative trait (plant height) was used. The same plant feature is also used as the obligatory plant characteristic during the official oilseed Distinctness, Uniformity, Stability (DUS) testing before variety registration in the Research Centre for Cultivar Testing (COBORU). The results of the study demonstrated that, the Miller’s method is more restrictive (less varieties were found to be uniform in plant height) compared to the Bennett’s method.

Key words: Bennett’s methods, coefficient of variation, oilseed rape, Miller’s methods, uniformity.