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Studies on the improvisation of seed production technology in hybrid rice (KRH-4)

KrishiKosh

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Title Studies on the improvisation of seed production technology in hybrid rice (KRH-4)
 
Creator K, Nataraj
 
Contributor Rame, Gowda
 
Subject livestock, mycotoxins, toxins, biological phenomena, diseases, necrosis, proteins, animal tissues, infiltration, enzymes
 
Description In order to standardize the seed production technology of newly
released rice hybrid KRH4, field experiments were conducted at the Zonal
Agricultural Research Station, VC Farm, Mandya, Karnataka for three
season viz., Kharif 2011, Kharif 2012 and Rabi /Summer 2012. The
laboratory studies were conducted during 2012–13 at AICRP on Seed
Technology Research Unit, National Seed Project, University of Agricultural
Sciences, Bangalore. The experimental results clearly revealed that,
the F1 hybrid rice KRH-4 performed better with the planting ratio of 1:6,
with mixed seedlings of R line (MSN36) at zero, five and eight days
difference old and recorded superior plant growth, seed setting per cent
(17.04 %, 15.99% & 22.48 %), panicle exsertion per cent (84.94%, 86.00%
& 91.29%), seed yield per hectare (1577 kg, 2083.33 kg & 3853.67 kg) and
seed quality attributes viz., germination (96%, 95% & 95%), mean seedling
length (28.30 cm, 26.00 cm & 28.30 cm) seedling dry weight (6.9 mg, 6.83
mg & 6.9 mg) and SVI I & II (2620 & 663; 2737 & 655; 3395 & 654) over
other planting ratios during kharif 2011, kharif 2012 and rabi/summer
2012, respectively. Similarly, plant growth regulators like Gibberllic acid @
100ppm found superior in promoting panicle exertion (88.71%, 88.14% &
90.00%), higher number of productive tillers (8.87, 8.67 & 14.90/plants)
with better filled spikelets (43.33,43.10 & 49.97/plant) seed setting per
cent (22.16%, 20.00% & 24.84%), that resulted in higher seed yield per
hectare (1335 kg, 1918.92 kg & 3096 kg) and seed quality attributes viz.,
germination (94%, 95% & 95.33%), mean seedling length (27.30 cm, 28.50
cm & 29.23 cm) seedling dry weight (7.03 mg, 7.30 mg & 7.23 mg) and SVI
I & II (2565 & 661; 2698 & 691; 2565 & 661) over control (no foliar spray)
during kharif 2011, kharif 2012 and rabi/summer 2012, respectively.
However, the seed production performance during rabi/summer 2012 was
slightly better in terms of plant growth, seed yield and quality compared to
kharif season. Further no dormancy was observed in resultant seeds of F1
hybrid (KRH-4) and its parental lines (R line-MSN36 and A line-CRMS32A).
Based on the SSR marker study on genetic purity assessment, it is
suggested that, SRR marker RM216 can be effectively used to differentiate
the parental lines from hybrid rice KRH-4. The storability of MSN36,
CRMS32A and KRH-4 indicated that seed treated with Bavistin (4g\kg) and
packed in poly pouch with 10 per cent moisture maintained higher
germination (MSN36-83%; CRMS32A-80%; KRH-4-80%) and other seed
quality attributes up to nine months under ambient conditions of
Bengaluru. The seeds treated with Bavistin (4g\kg) and packed in poly
pouch maintained minimum standard of germination upto 7 months in
CRMS32A (80%), 11 months in MSN36 (80%) and upto 8 months in KRH-4
(80%).
 
Date 2016-05-23T12:59:35Z
2016-05-23T12:59:35Z
2013-10-15
 
Type Thesis
 
Identifier Th-10677
http://krishikosh.egranth.ac.in/handle/1/66215
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences, Bengaluru