Indian Society of Genetics & Plant Breeding

Evaluation of marker assisted backcross breeding derived lines for morpho-physiological characters under late sown heat stress condition in bread wheat

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An experiment was conducted to study the performance of
BC2F3 and BC1F4 lines derived in marker assisted backcross
breeding (MABB) program for different morphological and
physiological traits under late sown conditions. Two QTLs
were introgresed into HD2733, one for days to anthesis and
other for yield under stress conditions from an identified
heat tolerant variety WH730 (donor). The lines were
subjected to heat stress by sowing late in the season and
the data was recorded on several characters at different
phenological stages. A significant difference (P<0.05)
between BC2F3 and BC1F4 lines for many traits at phenotypic
level was observed but a few traits did not show significant
difference and the lines were more and less similar with
recurrent parent HD2733. Backcross derived lines showed
improvement over recurrent parent for some important
morpho-physiological traits including yield under high
temperature stress condition. However, overall performance
of BC2F3 lines was slightly better than the BC1F4 lines for
morpho-physiologically important characters. For most of
the DUS traits, both BC2F3 and BC1F4 lines were having
closer values to the recurrent parent attributing to the
recovery of the recipient parent genome. Seventeen BC2F3
and 10 BC1F4 lines were selected for their superior
performance which will be further evaluated in multilocation

Keywords: Molecular marker assisted breeding, backcross, NDVI, CT, genome recovery


Year: 2016
Volume: 76
Issue: 3
Article DOI: 10.5958/0975-6906.2016.00046.8
Print ISSN: 0019-5200
Online ISSN: 0975-6906


K. T. Ramya info_circle
C. Prashant Kumar info_circle
R. Neha info_circle
T. Leena info_circle
Harikrishna info_circle
P. Ramya info_circle
N. Jain info_circle
P. K. Singh info_circle
G. P. Singh info_circle
K. V. Prabhu info_circle

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