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Wheat Information Service
Number 90:47-48 (2000)
Research information
Long anther trait of rye (Secale cereale
L.) - its chromosomal location and expression in bread wheat
(Triticum aestivum L.)
P. Plaha and G. S. Sethi
Department of Plant Breeding and Genetics, H. P. Agricultural
University, Palampur 176 062 (HP) India
Rye (Secale cereale L.), a relative of bread wheat
(Triticum aestivum L.), has contributed substantially in the
genetic improvement of the latter. In most of the cases, rye
chromatin conferring resistance to biotic and abiotic stresses has
been transferred in bread wheat. At the same time, there are certain
other traits, which can also be exploited in wheat improvement. One
such trait is anther length, which is markedly more in rye than
wheat. This trait can act as good morphological marker and has
potential to be exploited in hybrid wheat breeding program if
incorporated into the wheat genome. However, the chromosomal location
of this trait and expression in the genomic background of bread wheat
has not been reported.
The material for the present study comprised Chinese Spring wheat,
Imperial rye, and a set of addition lines of the former with
individual added chromosome of the latter, obtained from the' Wheat
Genetics Resource Center, Kansas State University, Manhattan, USA.
Each genotype was raised in pots under similar conditions. Length of
anthers from the florets of the central spikelet of 5 plants was
recorded just before dehiscence under a stereoscopic microscope. Mean
anther length of the genotypes under study was compared using
t-test.
Data on mean anther length of the test genotypes (Table
1) depicted that rye had the longest anthers. Of the 7 addition
lines, the one with 4R chromosome of rye had significantly longer
anthers than the remaining 6 addition lines as well as Chinese Spring
wheat, which were statistically at par with one another. These
results support that the rye chromosome 4R is responsible for
increased anther length. However, anther length of this addition line
was statistically shorter than that of the rye parent. It is evident
that the expression of anther length of rye gets reduced to an
intermediate level in the genetic background of bread wheat. It is
also a common observation that the anther length of rye gets reduced
in its amphiploid with durum wheat, the triticale (x
Triticosecale). Thus, the expression of the trait gets diluted
in the genomic background of both durum and bread wheat, may be due
to intergenomic interactions.
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