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Balakrishna, P.
- Propagation of Rhizophora Species through Viviparous Hypocotyl Cuttings and Air Layering
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Indian Forester, Vol 126, No 11 (2000), Pagination: 1222-1230Abstract
Vegetative propagation protocols from viviparous hypocotyl cuttings and air layering were standardised for three species of Rhizophora viz., R. apiculata, R. mucronata and R. x hybrid. Hypocotyl cuttings treated with Indole Butyric Acid (IBA) at a concentration of 1500 to 2000 ppm gave better ischolar_main induction, growth response and number of ischolar_mains in all three species. The viviparous hypocotyls were cut into three equal portions (upper, middle and lower) and used in the experiment. The lower part of the viviparous hypocotyls including the ischolar_main portion responded better than the upper and middle portions. Air layers treated with 2000-2500 ppm of IBA showed good ischolar_main induction in R. apiculata and R. mucronata while a combination of IBA (500 ppm) and NAA (200 ppm) gave better response in the R. x hybrid. Rooted cuttings and air layers were transferred to the field after hardening in mist chambers for two months after the appearance of the ischolar_mains. Rooted cutting and air layers were established in the field nursery MGRCC (Mangrove Genetic Resource Conservation Centre) in Pichavaram with 83% survival.- Validation of Bt-gene and Study of Packaging Materials on Seed Longevity in Bt-cotton Hybrids
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1 Department of Seed Science and Technology, University of Agricultural Sciences, G.K.V.K., Bengaluru, Karnataka, IN
1 Department of Seed Science and Technology, University of Agricultural Sciences, G.K.V.K., Bengaluru, Karnataka, IN
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Asian Journal of Bio Science, Vol 8, No 1 (2013), Pagination: 1-5Abstract
A laboratory experiment was carried out to validate Bt gene and to study the storage potential of Bt-cotton hybrids. Results revealed that, all the six Bt-cotton hybrid seed lots selected for the study were positive for Bt-gene (Cry 1 Ac). In the storage study, the seed lot L1 recorded highest germination (71.55%) and lowest in L3 (68.11%) at the end of ten months of storage. Among the packaging materials, seeds stored in P1 and P2 recorded highest germination (71.50 and 71.50%, respectively) compared to P3 (68.11 %). Seedling vigour index was highest (2007) in L1 and lowest (1792) in L6. Irrespective of seed lots, P1 recorded highest vigour (1981) followed by P2 (1963) and lowest in P3 (1759) at the end of ten months of storage. Germination per cent in polythene bag and polylined cloth was above the minimum seed certification standards (70.00%) upto ten months of storage. However, genotypic differences were observed with respect to seed quality.Keywords
Cottton, Validation, Bt Gene, Storability, Seed QualityReferences
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- Analysis on Emerging Trends and Challenges in Smart Grid Automation Technology from Generation to Distribution
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1 Department of Electrical Engineering, IIT Madras, Chennai- 600036, T.N., IN
2 GE HTC, Cyber Pearl, Hitech City, Madhapur, Hyderabad - 500081. A.P., IN
1 Department of Electrical Engineering, IIT Madras, Chennai- 600036, T.N., IN
2 GE HTC, Cyber Pearl, Hitech City, Madhapur, Hyderabad - 500081. A.P., IN