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Wheat Information Service
Number 88: 37-42 (1999)
Research article
Near-isogenic lines of spring common wheat
Novosibirskaya 67 marked with short and long glume
S. F. Koval
Institute of Cytology and Genetics, Siberian Division of the Russian
Academy of Sciences, Novosibirsk, 630090, Russia
Summary
Near-isogenic lines (BC9) of common spring wheat
(Triticum aestivum L.) Novosibirskaya 67 marked with short
(ANK-29) and long (ANK-30) glume were studied. Recessive allele
s1, located on chromosome 3D, was a marker trait of ANK-29. In
addition to short glume, ANK-29 is characterized by shortened stem
and spherical grain, that is, the entire set of distinguishing traits
of the donor (T. sphaerococcum). ANK-30, a derivative of T.
polonicum, exhibits long glume and lemma, whereas the lengths of
palea and grain are similar to those of the recurrent parent
(Novosibirskaya 67). Comparative study of the near-isogenic lines
suggests that the grain length is influenced by the size of
palea.
Key words: Wheat, Near-isogenic lines, Glume length, Lemma,
Aneuploid analysis.
Introduction
Several wheat species with lengthened or shortened grain linear
size and glumes (Triticum polonicum, T. turanicum and T.
petropavlovsky) have been described (Zhukovskii 1964; Dorofeev
1976). Middle Asian T. aestivum cultivars of Surchak type
exhibit increased length of kernels and glumes. Genetics of this
trait remains scantily investigated. Short glume and spherical grain
of T. sphaerococcum are known to be determined by a recessive
allele s1 located on the long arm of chromosome 3D (McIntosh 1988;
Goncharov 1992). The gene Eg1 responsible for long glume of
T. polonicum was localized to the long arm of chromosome 7A by
Arbuzova et al. (1996) using our hybrids.
Experts in plant resources and plant breeders believe that the grain
length correlates with the glume length in common wheats of Surchak
type, T. polonicum, T. turgidum, and T. petropavlovsky,
and their use as donors of the latter trait will result in
long-grained cultivars.
However, the pleiotropic effects of glume and grain lengths have not
been studied. Correlation analysis of these traits in various species
gives ambiguous results due to differences in their genetic and
ecological characteristics. This was also the reason for a failure of
the relevant experiments with hybrids of these species and common
wheat. Nevertheless, Zhukovskii (1964) suggested that the spherical
grain trait was separatable from other undesirable characteristics of
T. sphaerococcum (small grain, low yield, and unacceptably
short stem).
Near-isogenic lines present a convenient model for studying this
problem, as they possess near identity in all the characteristics
except the selected marker traits and nearby chromosomal regions
(Koval 1991, 1997).
The goal of this work was to study the genetics and pleiotropic
etfects of glume length in the near-isogenic lines marked with short
and long glume and clarify the connection between the glume length,
grain length, and plant productivity.
E-mail: kovalsv@cgi.nsk.su
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