IMPROVEMENT OF KUBANKA DURUM WHEAT. 13 
SUMMARY. 
Kubanka is superior to each of the other varieties of durum wheat 
in one or more important characters. 
From a head selection made in 1906 from Kubanka (C. I. No. 
1440) at the Dickinson substation, Kubanka No. 8 (C. I. No. 4063) 
was developed. This strain ranks high in quality and in yield 
under rust-free conditions, but is somewhat more susceptible to 
rust than the original Kubanka. 
One hundred and forty-three head selections were made from 
Kubanka (C. I. No. 1440) at the Dickinson substation in 1915. The 
best of these have been grown at Dickinson during the past seven 
years in the nursery and five years in plats; at Fargo, N. Dak., 
during five years in the nursery and two years in plats; and at Man- 
dam, N. Dak., Edgeley, N. Dak., and Moccasin, Mont., for one year 
im plats. 
TABLE 8.—Average data obtained on yield, stem-rust infection, and gasoline color score 
of the Kubanka selections and durum-wheat varieties grown at Dickinson, N. Dak., 
during the years from 1917 to 1922 and at Fargo, N. Dak., during the years from 1918 
to 1922, inclusive. | 
tem-rust infection 
nm 
_ Gasoline color score. 
| (ner cent). 
7 | Dickin- | | | 
Strain or variety. Dickinson. Fargo. | son. Fargo. | | 
~ i | iekin-! 
- SSS = Aver- ie | Fargo, Aver- 
l - 
Plats, | NZS plats | Nurs- | Nurs- | Nurs- | 28 | years. |2 Years-| age. 
2 | ery >| ery ery ery 
2 years. ¢ vars. 2 oat 5 years. 3 years. 5 years.| | 
| | | a } 
| | 
Kubanka No. 8........ “3 ES Siete aes ; oi aeaeees. pees | 7 i Mette ee 
Kubanka No. 34....-... 18.0 18.0 23.9 | 30.9 | 7 22) 19.5 1.61 | 2.00 1.81 
Kubanka No. 58 20.3 ve & Seeeaee Bee 5 Pe ee oa 7 As gl Sage ees a 
Kubanka No. 74 19.1 17.9 re 34.1 | 5 38 | 21.5 1572'}" 2209 91 
Muhankst No: 94 2522 Stott: 15.9 33.0 31.7 | 3 17 | 10.0 1.24 $5292. 4227 
Kubanka No. 98 (No- 
TS 2 yea epee nee 20.7! 16.8 =: | 48 eh ai 2 8} 5.0 1.45 1.46 1.46 
Kubanka No. 99.. a 20.4 16.3 33.2 | 37.4 2 6; 4.0 1.32 12305) Si 
Kubanka No. 117....... 20. 4 1,04. oe 34.2 3 8 5.9 1.39 Pay Vea 2e 
Kubanka No. 132...-.-. 20.3 16s es At 38 ee eos 9 A are a ge be ee | Ey (a's 
Kubanka No. 133-.....'.......-. 16.4 20.4} 35.1 4 39 | 21.5 1.88 2.34) 2.11 
Kubanka (C. I. No. . | | 
ic. OE aes eee + 19.3 15.8 77. pee eee 7 40 | 23.5 1.67] 1.94! 1.81 
Monad (C. 1, No. 3320) =.}. 20.8 |.....-.. Soe Dy pene oe ee es pertesse 4206: 1.0257 4 
Acme (C. I. No. 5284)...} 19.4 |........ 31.8 Yet Eft <- nS i BORE fe% pee 21.67 | 4.69 |21.18 
Mindum (C. I. No. 5296); 18.2 /-....... Wd Ee cas | 9 SS es al EE ee oes Besa 
4 | 
2 Not entirely comparable. 
The most important results obtained from these experiments 
are summarized in Table 8, which shows the average data obtained 
at Dickinson and Fargo on grain yield* and on stem-rust infection 
and the average gasoline color score of flour made from grain grown 
at these two stations. 
6 Table 2 shows 5-year average yields at Dickinson, N. Dak. Table 7 shows the average yield for only 
two years, as some of the selections were grown for only two years in the larger plats. The results fora 
longer period in smaller plats agree closely with the results shown in Table 8. 
