Hayes and Garber - Cucurbit Breeding

80 BREEDING CROP PLANTS
and those for hairy chaff on the 1:3:3:1 series. Kezer and
Boyack (1918) obtained complete linkage of black and hairy
chaff in a cross of black winter emmer with a smooth, whitechaffed
winter wheat (T. vulgare). Freeman (1917) obtained
FIG. 18. Upper group from left to right: Face and side views respectively
of lumillo durum (C.I., 1736), Fi lumillo X Marquis, and Marquis. The Fi
spikes are intermediate in density, have tipped awns and the outer glumes are
keeled although not so strongly as lumillo. Lower group, left to right, face and
side views respectively of Emmer, Minn., 1165, Fi Emmer X Marquis, and
Marquis. The F\ approaches the Emmer in some spike characters and has
tipped awns.
some correlation between a high ratio of width to thickness of
spike and hardness of grain in crosses between T. durum and T.
vulgare. He considers, however, that numerous, factors are
necessary for the development of these characters.