Hayes and Garber - Cucurbit Breeding

IMPROVING SELF-FERTILIZING CROPS 133
isolation of desirable forms. This was done at the Svaldf Station.
The selections, Klock 1 and Stormogul, maturing early and late
respectively, were obtained. Both possess stiff straw and Stormogul
has good yielding ability. The improvement of the latter
character was sought by crossing with higher yielding light
colored forms. The following diagram indicates the method
followed. The varieties and strains were purified before the
crosses were made.
Svart Tartarish Plymhafre
Milton (Probsteier type)
Stormogul (1901)
I
Klock I (1901) X Guldregn (1903)
i
X Klock II (1909)
I
Klock III (1917)
Klock II is the result of crossing a good-yielding black oat of
stiff straw (Klock I) with a high-yielding yellow oat (Guldregn).
The offspring has the stiff straw of Klock I and the high-yielding
ability of Guldregn. One selection in the cross of Klock II with
Stormogul gave a strain, Klock III, which has the early maturity
of Klock II, a somewhat higher yielding ability than Stormogul,
as well as non-lodging ability, which last character both parents
possessed. In Table XXX the yields of three of the strains
are shown.
TABLE XXX. RESULTS OF COMPARATIVE YIELD TRIALS OF THE VARIETIES
KLOCK II, STORMOGUL, AND A SEGREGATE KLOCK III OF A CROSS
BETWEEN STORMOGUL X KLOCK II AS OBTAINED AT SVALOF
FROM 1912 TO 1916
Grain