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Assessment of rice (Oryza sativa L.) for drought tolerance with SSR markers

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Relation http://oar.icrisat.org/10731/
 
Title Assessment of rice (Oryza sativa L.) for drought tolerance with SSR markers
 
Creator Thakur, P
Prasad, K
Pande, A
Kumar, S
Chaudhary, V P
Prasad, L C
 
Subject Crop Improvement
Rice
 
Description Drought remains a major constraint in rice (Oryza sativa L.) for
productivity in rainfed environments, leading to huge economic
loss. Molecular marker technology helps in identifying genomic
regions influencing the response of yield and its components to
water deficits, which will aid in our understanding the genetics
of drought tolerance and development of more drought-tolerant
cultivars. Investigation was carried out in rain out shelter at
Birsa Agricultural University, Ranchi, Jharkhand with the aim to
identify superior F3 segregants having drought-tolerant QTLs,
from 100 randomly selected segregants of a cross between
drought-tolerant (DT) parent Birsa Gora 102 and drought-susceptible
(DS) parent BPT 5204. Check parents Vandana (DT)
and IR 20 (DS) were used. Plant height, panicle length, number
of tillers, number of effective tillers, grains per panicle, panicle
weight, seed yield per plant and test weight were the traits under
investigation. Seventeen segregants were identified as superior,
with yield higher than 7.03 g/plant. The parents were analyzed
with 19 SSR markers, out of which 14 markers were found to be
polymorphic. These polymorphic markers were used to analyze
the randomly selected segregants. None of the segregants were
found to be homozygous at entire 14 loci. Seventeen identified
segregants were found to have the drought tolerant QTLs. The
genomic regions flanked by the polymorphic markers have been
reported to be associated with several drought resistance component
traits. Hence, the segregants identified in the early generation
can be advanced further to develop drought tolerant cultivar.
 
Date 2017-02
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/10731/1/324.pdf
Thakur, P and Prasad, K and Pande, A and Kumar, S and Chaudhary, V P and Prasad, L C (2017) Assessment of rice (Oryza sativa L.) for drought tolerance with SSR markers. In: InterDrought-V, February 21-25, 2017, Hyderabad, India.