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Deb, Debal
- A Profile of Heavy Metals in Rice (Oryza sativa Ssp. Indica) Landraces
Abstract Views :287 |
PDF Views:90
Authors
Affiliations
1 Centre for Interdisciplinary Studies, Barrackpore 700 123, IN
2 DST Unit of Nanoscience, Department of Chemistry, Indian Institute of Technology-Madras, Chennai 600 036, IN
1 Centre for Interdisciplinary Studies, Barrackpore 700 123, IN
2 DST Unit of Nanoscience, Department of Chemistry, Indian Institute of Technology-Madras, Chennai 600 036, IN
Source
Current Science, Vol 109, No 3 (2015), Pagination: 407-409Abstract
No Abstract.Full Text
- Unusually High Frequency of Cross-Pollination Between Rice Landraces Shiuli and Kharah with Coincident Flower-Opening Times
Abstract Views :203 |
PDF Views:85
Authors
Debal Deb
1,
D. Bhattacharya
1
Affiliations
1 Centre for Interdisciplinary Studies, 186A Kalikapur Canal Road, Kolkata 700 099, IN
1 Centre for Interdisciplinary Studies, 186A Kalikapur Canal Road, Kolkata 700 099, IN
Source
Current Science, Vol 121, No 1 (2021), Pagination: 121-126Abstract
Cross-pollination in cultivated rice (Oryza sativa L.) is rarely reported to exceed 2%. This low cross-pollination frequency (CPF) is conducive to success-fully maintaining the purity of rice landraces for many generations. We were therefore surprised to notice a dramatic loss of genetic purity in some of the pure line landraces in many farmers’ fields. Having ruled out the possibility of mixing of seeds from dif-ferent varieties, we surmised this rapid loss of genetic purity to be due to a somewhat higher degree of cross-pollination, and conducted a carefully designed expe-riment with suitably chosen pairs of landraces. We report here an unusually high (>81%) CPF seen in a pair of landraces whose flower opening times (FOTs) were coincident. Our control experiment on a pair of landraces with non-overlapping FOTs failed to detect any cross-pollination. This preliminary report sug-gests that the crucial importance of FOT diversity in landraces in determining CPF has not been recognized in designs of previous reports of crossing experiments, resulting in a severe underestimation of CPF in cultivated rice under natural conditions.Keywords
Cross-Pollination Frequency, Flower Opening and Closing Times, Genetic Purity, Pollen Viability, Rice Landraces.Full Text
References
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- Rare and neglected rice landraces as a source of fatty acids for undernourished infants
Abstract Views :168 |
PDF Views:71
Authors
Sandipan Ray
1,
Debal Deb
2,
Amarnath Nandy
3,
Debopriya Basu
4,
Agnideep Aich
5,
Sudipta Tripathi
6,
Sugata Sen Roy
7,
Mousumi Poddar Sarkar
8
Affiliations
1 Wipro Ltd, Doddakannelli, Bengaluru 560 035, IN
2 Centre for Interdisciplinary Studies, 186A, Kalikapur Canal Road, Kolkata 700 123, IN
3 Interdisciplinary Statistical Research Unit, Indian Statistical Institute, 203, B.T. Road, Kolkata 700 108, IN
4 Department of Mathematics and Statistics, University of Concordia, 1400 de Maisonneuve Blvd. West, Monteréal, Québec, Canada, CA
5 Department of Mathematics, University of Louisiana at Lafayette, LA 70504-3568, US
6 Agricultural Experimental Farm, University of Calcutta, Baruipur, Kolkata 700 144, IN
7 Department of Statistics, University of Calcutta, 35 B.C. Road, Kolkata 700 019, IN
8 Department of Life Sciences, Presidency University, Kolkata 700 073, IN
1 Wipro Ltd, Doddakannelli, Bengaluru 560 035, IN
2 Centre for Interdisciplinary Studies, 186A, Kalikapur Canal Road, Kolkata 700 123, IN
3 Interdisciplinary Statistical Research Unit, Indian Statistical Institute, 203, B.T. Road, Kolkata 700 108, IN
4 Department of Mathematics and Statistics, University of Concordia, 1400 de Maisonneuve Blvd. West, Monteréal, Québec, Canada, CA
5 Department of Mathematics, University of Louisiana at Lafayette, LA 70504-3568, US
6 Agricultural Experimental Farm, University of Calcutta, Baruipur, Kolkata 700 144, IN
7 Department of Statistics, University of Calcutta, 35 B.C. Road, Kolkata 700 019, IN
8 Department of Life Sciences, Presidency University, Kolkata 700 073, IN
Source
Current Science, Vol 121, No 5 (2021), Pagination: 660-666Abstract
This study deals with the quantitative assessment of nutritionally important fatty acids (FAs) in 94 indigenous rice (Oryza sativa ssp. indica) landraces of India which are critically endangered, being cultivated only by a handful of marginal farmers. Three modern high-yielding varieties and one local high-yielding farmers’ variety were analysed for comparative assessment. Qualitative and quantitative analyses of FAs based on gas chromatography-mass spectrometric analysis of these varieties revealed their significant contribution to daily diet. Two ‘case studies’ were considered on the basis of individual FAs and nutritionally correlated FA parameters of the rice cultivars to isolate the most promising landraces, by clustering through linear discriminant function. These folk rice landraces may add important precursors to essential FAs in the staple diet and can provide for FA requirement in normal brain development in infants. We suggest incorporation of these landraces into India’s food and agriculture policy, both for conserving the vanishing landraces and for ensuring nutritional security of the economically marginalized people.Keywords
Fatty acids, gas chromatography-mass spectrometry, landraces, linear discriminant analysis, rice.Full Text
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