Characterization of cytoplasmic male sterile lines in wheat (Triticum aestivum L.)
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Date
2006
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Publisher
CCSHAU
Abstract
The present investigation was carried out during 2005-2006 at experimental
area of wheat section, Department of Plant Breeding, CCS Haryana Agricultural
University, Hisar. In this experiment various floral and agronomic traits and
protein profiles of 16 cytoplasmic male sterile lines (A lines) of wheat representing
two different cytoplasmic sources and their corresponding maintainer lines (B
lines) were studied under timely and late sown conditions. Significant variation
between the CMS lines and B lines was observed with respect to floral traits viz.,
anther size, filament length, ovary size, length of style and anther colour, glumes
opening angle, stigma receptivity, pollen viability, out crossing and agronomic
traits namely number of tillers, plant height, spikelets, number of spikelets per
spike. The mean values for different floral traits in the CMS lines was lesser than
an equal to that of their fertile counterparts opened. Glumes angle had maximum
variation, stigma receptivity had the least variation, which ranged from 4 to 5 days.
Among various CMS lines all the CMS lines except three exhibited complete male
sterility under both dates of sowing. The number of tillers per plant and plant
height was reduced in CMS lines as compare to maintainer lines. For traits like
spike length, number of spikelets per spike, reduction was in both direction
negative and positive. In this way, the interaction of cytoplasm with different
nuclear backgrounds can be in positive as well as in negative direction. CMS lines
flowered later than respective B lines. In electrophoresis a polymorphic band was
observed while it was absent in majority of CMS lines and present in all the
maintainer lines. The result of present study indicate more or less stable
performance of sixteen CMS lines studied with respect of floral, agronomic traits
and protein profile.