46 
Journal of Agricultural Research 
Vol. XXIX, No. 1 
13. Evidence of segregation for the 
color and ash of the flour also was indi¬ 
cated among F 4 selections. 
14. The amount of correlation be¬ 
tween date of heading and height of 
plant increased with increasingly un¬ 
favorable environmental conditions due 
to rust and drought. 
15. A significant positive correlation 
was found between date of heading and 
percentage of stem-rust infection; the 
earlier plants apparently partially es¬ 
caped rust. 
16. Date of heading and yield of 
plant were negatively correlated, early 
plants proving more productive. An 
important correlation was obtained 
between dates of heading in 1922 and 
in 1923. 
17. Important and significant posi¬ 
tive correlations were obtained be¬ 
tween yield and height of plant and 
between heights of plant in 1922 and 
in 1923. 
18. Small positive correlations were 
found between awn and yield. Dif¬ 
ferences of 11 to 18 per cent in yield 
were found in favor of awned over 
awnless strains. 
19. Negative correlations, not im¬ 
portant or significant, were obtained 
between yield of plant and stem-rust 
infection. An important correlation 
was obtained between stem-rust in¬ 
fections in 1922 and in 1923, proving 
that resistance is inherited. 
20 . Selections have been made from 
the cross on the basis of the informa¬ 
tion gained from the investigations. 
Early, tall, awned, rust-resistant high- 
yielding plants predominate among the 
selections. Their quality in F 4 and 
later generations, based on the quality 
and quantity of gluten and color and 
ash of the flour, have been and will be 
used as a basis for further trial or for 
elimination. The white types are 
being grown in the Pacific Coast area 
and the hard red spring types will be 
extensively tested under conditions of 
drought and rust in the northern spring- 
wheat area. 
LITERATURE CITED 
(1) Anonymous. 
1908. THE PROBABLE ERROR OF A MEAN, BY 
student. Biometrica 6: 1-25. 
(2) Aamodt, O. S. 
1923. THE INHERITANCE OF GROWTH HABIT AND 
RESISTANCE TO STEM RUST IN A CROSS BETWEEN 
TWO VARIETIES OF COMMON WHEAT. Jour. Agr. 
Research 24: 457-469, illus. 
(3) Beaven, E. S. 
1920. BREEDING CEREALS FOR INCREASED PRO¬ 
DUCTION. Jour. Farmers Club, London, pt. 6, 
p. 107-131. 
(4) Biffen, R. H. 
1905. MENDEL’S LAW OF INHERITANCE AND 
wheat breeding. Jour. Agr. Sci. 1: 4-48, 
illus. 
(5) Bryan, W. E., and Pressley, E. H. 
1921. PLANT BREEDING. INHERITANCE OF EARLI¬ 
NESS IN WHEAT. Ariz. Agr. Exp. Sta. Ann. 
Rpt. (1920/21) 32: 603-605. 
(6) Clark, J. A., Martin, J. II., and Ball, C. R. 
1922. classification of American wheat va¬ 
rieties. U. S. Dept. Agr. Bui. 1074, 238 p., 
illus. 
(7) —-— and Shollenberger, J. H. 
1924. comparative value of Kota and Mar¬ 
quis WHEATS FOR MILLING AND BREAD MAKING. 
Northwestern Miller. (In press.) 
(8) - Stephens, D. E., and Florell, V. II. 
1920. AUSTRALIAN WHEAT VARIETIES IN THE PA¬ 
CIFIC coast area. U. S. Dept. Agr. Bul. 877, 
25 p., illus. 
(9) -and Waldron, L. R. 
1923. KOTA WHEAT. U. S. Dept. Agr. Circ. 280, 
16 p., illus. 
(10) Engledow, F. L., and Wadham, S. M. 
1923. INVESTIGATIONS ON YIELD IN THE CEREALS. 
i. Jour. Agr. Sci. 13: 390-439, illus. 
(11) Farrer, W. 
1898. THE MAKING AND IMPROVEMENT OF WHEATS 
FOR AUSTRALIAN CONDITIONS. Agr. Gaz. N. S. 
Wales 9: 131-168, 241-260. 
(12) Florell, V. H. 
1923. CEREAL EXPERIMENTS AT CHICO, CALIF. 
U. S. Dept. Agr. Bul. 1172, 33 p., illus. 
(13) - 
1924. STUDIES ON THE INHERITANCE OF EARLINESS 
in wheat. Jour. Agr. Research. (In press.) 
(14) Freeman, G. F. 
1918. PRODUCING BREADMAKING WHEATS FOR 
warm climates Jour. Heredity 9: 211-226, 
illus. 
(15) Gaines, E. F. 
1917. INHERITANCE IN WHEAT, BARLEY, AND OAT 
hybrids. Wash. Agr. Exp. Sta. Bul. 135, 61 
p., illus. 
(16) Gortner, R. A., and Sharp, P. F. 
1923. THE PHYSICO-CHEMICAL PROPERTIES OF 
STRONG AND WEAK FLOURS. III. VISCOSITY 
AS A MEASURE OF HYDRATION CAPACITY AND 
THE RELATION OF THE HYDROGEN ION CON¬ 
CENTRATION TO INHIBITION IN THE DIFFERENT 
acids. Jour. Phys. Chem. 27 : 481-492, illus. 
(17) Grantham, A. E. 
1918. wheat investigations—varieties. Del. 
Agr. Exp. Sta. Bul. 121, 49 p., illus. 
(18) Harlan, H. V., and Anthony, S. 
1920. DEVELOPMENT OF BARLEY KERNELS IN 
NORMAL AND CLIPPED SPIKES AND THE LIMITA¬ 
TIONS OF AWNLESS AND HOODED VARIETIES. 
Jour. Agr. Research 19: 431-472, illus. 
(19) Hayes, H. K. 
1923. INHERITANCE OF KERNEL AND SPIKE CHAR¬ 
ACTERS IN CROSSES BETWEEN VARIETIES OF 
triticum vulgare. Minn. Stud. Plant. Sci. 
4: 163-183. 
(20) -and Aamodt, O. S. 
1923. A STUDY OF RUST RESISTANCE IN A CROSS 
BETWEEN MARQUIS AND KOTA WHEATS. Jour. 
Agr. Research 24: 997-1012, illus. 
(21) -and Stakman, E. C. 
1922. WHEAT STEM RUST FROM THE STANDPOINT 
of plant breeding. Proc. Ann. Meeting West 
Canad. Soc. Agron. (1921) 2: 22-35, illus. 
(22) Howard, A., and Howard, G. L. C. 
1912-15. ON THE INHERITANCE OF SOME CHAR¬ 
ACTERS IN WHEAT. Mem. Dept. Agr. India, 
Bot. Ser. 5: 1-47, illus., 1912; 7: 273-285, illus., 
1915. 
(23) Luers, H., and Ostwald, W. 
1919. BEITRAGE ZUR KOLLOIDCHEMIE DES BROTES, 
II. ZUR VISKOSIMETRIE DER MEHLE. Kolloid 
Ztschr. 25: 82-90. 
(24) Nilsson-Ehle, II. 
1911. KREUZUNGSUNTERSUCHUNGEN an HAFER 
und weizen, II. Lunds. Univ. Arsskr. N. F., 
Afd. 2, Bd. 7, No. 6, 82 p. 
(25) Ostwald, W. 
1919. BEITRAGE ZUR KOLLOIDCHEMIE DES BROTES, 
I. UEBER KOLLOIDCHEMISCHE PROBLEME BEI 
der brotbereitung. Kolloid Ztschr. 25:26-45. 
(26) Perlitius, L. 
1903. DER EINFLUSS DER BEGRANNUNG AUF DIE 
WASSERVERDUNSTUNG DER AHREN UND DIE 
kornqualitat. 77 p., illus. Merseburg. 
(Inaug. Diss. Breslau.) 
