ISSN 1022-7954, Russian Journal of Genetics, 2008, Vol. 44, No. 3, pp. 334–338. © Pleiades Publishing, Inc., 2008.
Original Russian Text © K.U. Kurkiev, 2008, published in Genetika, 2008, Vol. 44, No. 3, pp. 389–394.
Study of the world hexaploid triticale collection
allowed dwarf forms essentially differing in their phe-
notype from the remaining accessions to be isolated.
The height of this form (15–25 cm) is considerably
lower as compared with the shortest accessions of
hexaploid triticale (50 cm) contained in the world col-
lection with the Vavilov Institute of Plant Industry .
In addition, they have a short yet very dense spike and
speciﬁc leaf structure. Consequently, it was of interest
to study the phenotypic and genotypic natures of this
phenotypically unusual triticale form.
MATERIALS AND METHODS
The work was conducted at the Dagestan Experi-
mental Station with the Vavilov Institute of Plant Indus-
try during 2002–2006. A new triticale form (ﬁgure) was
the initial material for this study. Its height is 15–25 cm.
Its stem has up to seven internodes; of them, only two
upper internodes (with a length of 5 to 10 cm) are dis-
tinct in the majority of plants. The remaining internodes
occur frequently; their length can amount to 0.1 to 8.0 cm.
The lower internodes are densely arranged, occupying
together an interval of approximately 1.0–1.5 cm. This
is suggested by the presence of ﬁve to seven well-devel-
oped leaves on the same stem. The lower leaves grow as
if as from a rosette. The length of leaf blade is 20–25 cm
and the width, 1.5 cm. The sheaths of all leaves consid-
erably overgrow the corresponding internodes by 5–20
cm (the base of leaf blade is usually located below the
stem node). The number of stems is one to seven.
The spike is short (4–6 cm) and contains 25–35 spike-
lets. The spike width is 1.5–2.0 cm. The spike density
increases considerably in its upper part. The awns are
2–3 cm long. The number of grains per spike amounts
to 5–20. The grains are very shrunken and imperfect.
The progeny of such plants is stable and displays no
segregation. The form studied is named KRL, which is
the Russian acronym for (rosette-leaved dwarf).
The triticale cultivars with standard morphotype—
PRAG 3, which is a tester for tall height, and PRAG
204, carrying two recessive shortness genes —were
involved in hybridization with KRL. The ﬁeld experi-
ments (autumn sowing) were commenced at the same
time in a grain-tilled crop rotation. The growing space
for one plant was 5
20 cm. The plants were harvested
with roots. The following parameters were studied
when analyzing F
hybrids: plant height; the length
of upper internode; spike length, color, and density; the
numbers of spikelets and grains in the main spike; and
the rise of the ﬂag leaf above the spike. The experimen-
tal data were statistically processed according to Dos-
pekhov . The domination index
according to Beil and Atkins .
-Square test, assess-
ing the match of the experimental data and theoretically
Specific Phenotypic and Genotypic Features
of an Ultradwarf Hexaploid Triticale Form
K. U. Kurkiev
Dagestan Experimental Station, Vavilov All-Russia Institute of Plant Industry,
Vavilovo, Derbent raion, 368600 Republic of Dagestan, Russia; e-mail: email@example.com
Received February 22, 2007
—A new dwarf form (15–25 cm) of hexaploid triticale differing in its morphology from all the acces-
sions of the world collection was studied. Analysis of the F
hybrids between this triticale form and the trit-
icale with common morphology has demonstrated that the dwarﬁsm is determined by one gene with an incom-
plete dominance, which inﬂuences several morphological traits (internode length, leaf structure, and spike
length, density, and color). The presence of this gene partially or completely inhibits expression of the genes
controlling these traits.