Fig. 4: Chromosomal configurations at metaphase I in three tetraploid Solanum tuberosum varieties.
From: Varietal variation and chromosome behaviour during meiosis in Solanum tuberosum
I, II, III and IV indicate univalent, bivalent, trivalent and quadrivalent, respectively. The number of pollen mother cells analysed is given by n. The percentage of cells showing each configuration is indicated on the x axis.
