STUDIES ON INDUCED AND RECOMBINATIONAL VARIABILITY IN DICOCCUM WHEAT (Triticum dicoccum Schrank Suhulb)
Loading...
Date
2004-01-30
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Agricultural Sciences GKVK, Bangalore
Abstract
STUDIEiS ON INDUCED AND RECOMBINATIONAL VARIABILITY
IN DICOCCUM WHEAT [Triticum dicoccum schrank Suhulb)
DEEPAK S. BILGI 2003
ABSTRACT
Dr. S. A. PATIL
MAJOR ADVISOR
An investigation was carried out during rahi season 2001 to assess the
extent of variability released by hybridization, mutagenesis, hybridization
followed mutagenesis and to study the association pattern among the
component traits of seed yield under timely (Dl) and late sown (D2) conditions.
Two crosses viz., DDK1001XMACS2928 (Cl) and DDK1009XDDK1013 (C2)
were used to generate F3 and F3M3 generations and also Ms's of DDK 1001 and
DDK1009. The segregating populations were evaluated for ten quantitative
traits including seed yield.
The yield levels of different segregating populations hardly differed under
timely and late sown situations. The mean values did not differ much among
the populations within respective crosses. Wide range was observed in F3M3
populations of both the crosses under both sowing conditions.
The variability parameters .like, GCV, PCV, heritability and genetic
advance got reduced under D2 in Cl populations than in 02. Slightly higher
GCV and PCV for seed yield (SY) and its component traits like, plant height
(PH), spike length (SL), productive tillers (NP), grains per spike (GPS) and
thousand seed weight (TSW) suggests Cl populations as potential sources to
isolate productive lines compared to C2. Irrespective of cross and sowing time,
high variation was observed for SY, NP and GPS accompanied by high
heritability and genetic gain. Irrespective of cross and sowing time, variation
was slightly more in F3M3 than in F3 or M3.
Highly significant positive correlation of SY was observed with NP, SL
and GPS. The association pattern has been observed to change from F3 to F3M3
either on favourable side or on unfavourable side. More number of favourable
correlations are observed in C2 under both the sowing conditions.
Transgressive families recorded for SY, NP and TSW were numerically
higher in F3M3 than F3 or M3 both in Cl and C2 under both the sowing
conditions. Number of transgressive families were relatively more in Cl than
C2 under timely sown situation. Leaf blight disease score indicated more
number of resistant lines in F3M3 of Cl.
Description
Keywords
null