4. The first group of F2 data, below, suggests that g2 is on chromosome 7. Mumm's soft starch character, hh, carries an inhibitor for japonica. Neither bm3 nor v13 show close linkage with j.

Genes Phase XY Xy xY xy Total % Recomb.
G2 Lg RS 353 102 116 40 611 47
G2 Wx RS 371 109 99 33 611 49
G2 Rg CB 75 69 62 74 280 47
G2 Ij RS 310 118 101 3 532 20
Bd G2 RS 221 94 89 13 17 45
J Bm3 RS 216 81 65 13 377 41
J V13 RS 168 74 38 12 292 45

G. F. Sprague