Abstract
In cytological studies at diakinesis and at dia-metaphase of the diploid japonica type rice variety “Fukui-Ginbozu”. chromosomal associations of 3(3)+3(1), 3(3)+1(2)+1 (1), 4(3), 6(2) and others, showing definite deviation from the supposed maximum association, 2(3)+3(2), were observed frequently.
In this connection, a review of the previous works on the subject of so-called secondary association was presented.
