Multivariate evaluation of variability of Bromus genotypes from North-Eastern Poland.
In the years 2008-2010 phenotypic observations of the populations of Bromus secalinus L. at 14 sites in North-Eastern Poland were carried out. The populations were characterised by measurements of the following parameters: tuft height, number of culms in a tuft, height of generative shoots, length of panicle, number of spikelets in panicle, number of kernels in spikelet, number of kernels in panicle and seed production per plants. Cluster analysis by the Ward method distinguished 4 groups of genotypes of multivariate similar populations of rye brome. The greatest distances between the values of characters analysed were found between groups 1 and 4. On the basis of spatial autocorrelation analysis a significant autocorrelations for height of generative shoots, length of panicle and number of spikelets in panicle was found, which means that these traits were similar for spatially close populations.