Indian Society of Genetics & Plant Breeding

Breeding for free threshability in emmer wheat [Triticum dicoccum (Schrank.) Schubl.] through induced mutagenesis

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Twelve hundred and sixty one advanced breeding lines
derived through mutagenesis of the F1s of 14 Triticum
dicoccum x T. dicoccum, two T. dicoccum x T. durum and
T. durum x T. durum crosses and six elite lines of T.
dicoccum using Gamma rays treatment of seeds at
equilibrium seed moisture content of eight per cent were
studied for selecting superior genotypes with respect to
various agronomic and quality traits. Based on rachis
fragility and glume tenacity; 51 free-threshable dicoccum
lines were selected comprising 48 from eight T. dicoccum
x T. dicoccum crosses viz., NP-200 x MACS 2912 (10), NP-
200 x DDK 1009 (19), DDK 1001 x MACS 2928 (2), DDK
1013 x DDK 1001 (5), 266-10 x 248-4 (1), NP 200 x DDK-
1015 (1), NP-200 x MACS 2336 (4) and DDK 1009 x MACS
2931 (6), one from the elite T. dicoccum line MACS 2931
and one each from the T. durum x T. durum crosses viz.,
Bijaga Yellow x D 2571 and DWR 2006 x DWR 1005. Out of
these 51 stable free threshable mutants, two lines derived
from the cross NP-200 x MACS 2912 (line nos. 886 and
915) and one from DDK 1013 x DDK 1001 (line no. 206)
were nutritionally superior with early flowering, increased
seed weight and amber coloured grains. The line No. 206
recorded higher sedimentation value of 42ml, β-carotene
of 3.90 ppm and protein content of 14.36 per cent.
Hybridization followed by mutation created enormous
variability in the study indicating its effectiveness as a
breeding strategy for developing free threshability in
emmer wheat.

Keywords: Glume tenacity, free threshability, mutagenesis, rachis fragility


Year: 2008
Volume: 68
Issue: 4
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906


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