60 
Journal oj Agricultural Research 
Vol. XXX, No. t 
This type of awn behaves as a recessive 
character and apparently is distinct 
genetically from the other types of awn. 
The results obtained on the inherit¬ 
ance of lemma color in the Burt oat 
indicate that red is the most stable in 
breeding behavior. The dark browns 
and blacks tend to produce a high 
percentage of dark kernels, and seem 
to have a similar genetic constitution. 
Some of the kernels of the 1920 crop 
described as light brown and yellow 
probably were genetic reds manifesting 
the effects of physiological influences. 
Other workers have shown that white 
is a recessive kernel color in oats. In 
the experiments of the writers, how¬ 
ever, the parental kernels classed as 
white did not produce a high percentage 
of white progeny kernels. This may 
have been due to weathering, imma¬ 
turity, and physiological influences 
which prevented the development of, 
or which obscured, the true color. 
In the study of association between 
spikelet characters in Burt oat it has 
been found that correlation exists 
among the following characters: (1) 
Floret disjunction and spikelet dis¬ 
articulation; (2) spikelet disarticulation 
and basal hairs; (3) spikelet disarticu¬ 
lation and awns; (4) lemma color and 
spikelet disarticulation; (5) lemma 
color and awns. 
Burt oat has been shown to vary in 
many observable plant characters, 
such as habit of growth of the young 
plant, leaf color and leaf width, time 
of heading and ripening, and others. 
Several distinct variants have been 
observed, among them one showing a 
chlorotic condition of the leaves, one 
having multiflorous spikelets, one with 
loose paleas, and the false wild forms. 
These experiments provide a basis 
for future breeding experiments with 
Burt oat. The possibility of isolating 
comparatively pure-breeding strains 
from the variety is pointed out. The 
use of strains of Burt oats as parental 
material in genetic experiments with¬ 
out first carefully observing their 
breeding behavior for several years in 
pedigree culture is shown to be not in 
accord with accepted genetic methods. 
LITERATURE CITED 
(1) Agar, W. E. 
1920. CYTOLOGY, WITH SPECIAL REFERENCE TO 
the metazoan nucleus. 224 p., illus. Lon¬ 
don. 
(2) Akerman, a. 
1921. UNDERSOKNINGAR RORANDE FLYGHAVRE- 
LIKA MUTATIONER I VANLIG ODLAD HAVRE. 
Sveriges Utsadesfor. Tidskr. 31: 266-268. 
(3) - 
1922. UNTERSUCHUNGEN t>BER EINE IN DIREKTEM 
SONNENLICHTE NICHT LEBENSFAHIGE SIPPE VON 
AVENA sativa. Hereditas 3:147-177. 
(4) Archer, E., and others. 
1922. A CLASSIFICATION AND DETAILED DESCRIP¬ 
TION OF THE OATS OF AUSTRALIA. Aust. Inst. 
Sci. Indus. Bui. 23, 31 p., illus. 
(5) Atterberg, A. 
1891. NEUES SYSTEM DER HAFERVARIETATEN 
NEBST BESCHREIBUNG DER NORDISCHEN HAFER- 
formen. Landw. Vers. Stat. 39: 171-204. 
(6) Atwood, W. M. 
1914. A PHYSIOLOGICAL STUDY OF THE GERMINA¬ 
TION of AVENA FATUA. Bot.. Gaz. 57: 386-414.. 
(7) Babcock, E. B., and Clausen, R. E. 
1918* genetics in relation to agriculture.. 
675 p., illus. New York. 
(8) Bartlett, H. H. 
1916. LINKAGE AND CROSSING-OVER IN OATS 
Bot. Gaz. 62:323-325. 
(9) Bohmer, G. 
1910. UEBER DIE SYSTEMATIK DER HAFERSORTEN 
SOWIE t)BER EINIGE ZttCHTERISCH WICHTIGE 
EIGENSCHAFTEN DER HAFERRISPE. Ber. Ober- 
hess. Gesell. Nat. u. Heilk. Naturw. Abt. 
(1908-09) 3: 1-87. 
(10) -- 
1911. hafer im bilde. Fiihlings Landw. Ztg. 
60: 609-616. 
(11) Britton, N. L., and Brown, A. 
1896. AN ILLUSTRATED FLORA OF THE NORTHERN 
UNITED STATES, CANADA, AND THE BRITISH 
possessions, v. 1. New York. 
(12) Broili, j. 
1910. BEITRAGE 7UR HAFER-MORPHOLOGIE. Jour 
Landw. 58: 205-220. 
(13) Burnett, L. C. 
1912. SOME DATA FOR OAT GROWERS. Iowa Agr. 
Exp. Sta. Bui. 128: 93-127. illus. 
(14) Caporn, A. S. 
1918. THE INHERITANCE OF TIGHT AND LOOSE 
PALEAE IN AVENA NUDA CROSSES. JOUr. Genet- 
ics 7: 229-246, illus. 
(15) -- 
1918. AN ACCOUNT OF AN EXPERIMENT TO DETER¬ 
MINE THE HEREDITY OF EARLY AND LATE 
ripening in an oat cross. Jour. Genetics 7: 
247-257, illus. 
(16) Carleton, M. A. 
1905. IMPROVEMENT OF THE OAT CROP. Bien. 
Rpt.Kans. State Bd. Agr. (1903-04) 14: 32-42. 
1916. the small grains. 699 p., illus. New 
York. 
(18) Childs, R. R. 
1916. oat production in Georgia. Ga. State 
Col. Agr. Ext. Div. Bui. 113 (v. 5, no. 4), 12 p., 
illus. 
(19) Christie, W. 
1921. DIE VERERBUNG GELBGESTREIFTER BLATT- 
farbe bei hafer. Ztschr. Indukt. Abstain, 
u. Vererbungslehre 27: 134-14l v illus. 
(20) Coffman, F. A., and Quisenberry, K. S. 
1923. A MULTIFLOROUS VARIATION IN BURT OATS. 
Jour. Heredity 14: 185-192, illus. 
(21) Collins, G. N. 
1922. gametic coupling as a cause of correla¬ 
tions. Amer. Nat. 46: 569-590. 
(22) Cosson, E. 
1854. CLASSIFICATION DES ESPECES DU GENRE 
AVENA DU GROUPE DE L’AVENA SATIVA (AVENA, 
sect, avenatypus). Bui. Soc. Bot. France 
1: 11-17. 
EXPLANATORY LEGEND FOR PLATE 9 
A.—Dorsal and ventral views of kernels of the so-called “false wild” oat showing long and twisted 
geniculate awns. B.—Enlargement of basal portion of one kernel of the so-called “false wild” showing 
characters common to wild oat species, namely, disarticulation by abscission, (1) with resulting basal 
cavity with smooth margins; (2) flcret disjunction by disarticulation, leaving the second rachilla seg¬ 
ment attached ventrally to the lower floret, and (3) abundant long hairs on the rachilla segment. 
