Trace elemental characterization of some food crustacean tissue samples by EDXRF technique     

Anil Mohapatra  T.R. Rautray  V. Vijayan  Rajeeb K. Mohanty  S.K. Dey 《Aquaculture (Amsterdam, Netherlands)》2007,270(1-4):552-558

The trace elemental analysis of two species of mud crab and three species of prawn samples from Chilika lagoon, Orissa, India has been carried out by using Energy Dispersive X-ray Fluorescence (EDXRF) technique available at Institute of Physics, Bhubaneswar. Elements namely K, Ca, Mn, Fe, Cu, Zn, Se, Br, Sr and Pb have been measured in the present investigation. The study indicates the effectiveness of the technique in analyzing biological materials like tissue samples and opens a door for easy analysis of seafood items with a easy, fast, sensitive, simultaneous multi-elemental technique with a simple sample preparation procedure without any chemical treatment. Though all the specimens were collected from the same environment of the lagoon the elemental variation might be due to the differential migration pattern and metabolism or other biological factors.  相似文献   

Root Growth of a Salt Susceptible and a Salt Resistant Rice (Oryza sativa L.) During Seedling Establishment Under NaCl Salinity     

A. N. Misra  S. M. Sahu  I. Meera  P. Mohapatra  N. Das  M. Misra 《Journal of Agronomy and Crop Science》1997,178(1):9-14

The salt susceptible rice ( Oryza sativa L.) cv. Jaya and salt resistant cv. Damodar seed germination and seedling growth rates were studied in laboratory and field conditions. The effect of salinity on seed germination, shoot and root length, seedling vigour index (SVI) and increase in the root: shoot length ratio in the laboratory was relatively more in cv. Jaya than in cv. Damodar. The relative susceptibility to salinity was more in cv. Jaya than in cv. Damodar in the field also. However, their responses varied with growth period. The root: shoot length and fresh and dry weight ratios increased with salinity at 15 days in cv. Jaya. The root: shoot fresh and dry weight ratio decreased with salinity at 15 days in cv. Damodar. However, the root: shoot fresh weight ratio decreased with salinity at 25 days in the susceptible cv. Jaya. The root and shoot length fresh and dry weight of cv. Damodar was enhanced at 0.5% (w/v) NaCl treatment compared to the control seedlings at 25 days. SVI in cv. Jaya decreased with salinity in the laboratory and field conditions. SVI in cv. Damodar, SVI showed little change at 15 days but decreased with salinity of 1–3% NaCl with an enhancement at 0.5% NaCl level in the laboratory and at 25 days in field conditions.  相似文献   

Genetic mapping and QTL analysis for sugar yield-related traits in sugarcane   总被引：1，自引：0，他引：1  

Ram Kushal Singh  Sujeet Pratap Singh  Dinesh Kumar Tiwari  Shraddha Srivastava  Surendra Bahadur Singh  Mukut Lal Sharma  Rakesh Singh  Trilochan Mohapatra  Nagendra Kumar Singh 《Euphytica》2013,191(3):333-353

Genetic improvement of sugar content in sugarcane would benefit from the availability of sufficient DNA markers and a genetic map. Genetic linkage maps were constructed to identify quantitative trait loci (QTLs) for seedling brix (SB), brix (B), sucrose percent in juice (SUC), stalk number (SN), stalk length (SL), stalk diameter (SD), internodes (INT), number of green leaves (NGL), at three crop cycles across seven environments in a segregating population with 207 individuals derived from a bi-parental cross of sugarcane elite cultivars. Linkage analysis led to the construction of eight linkage groups (LGs) for Co86011 and sixteen LGs for CoH70. The combined length of the two linkage maps was 2606.77 cM distributed over 24 LGs. 31 QTLs were identified: 2 for SB, 7 for B, 6 for SUC, 4 for SN, 1 for SL, 3 for SD, 6 for INT and 2 for NGL at LOD scores ranging from 2.69 to 4.75. 7 QTLs (22 %) had stable effect across crop year and locations. Markers from parents were found to be associated with both positive and negative effect on all of the traits analyzed. The most important QTLs intervals identified in this study using single-dose marker, were qB2, qSUC2, qINT2 and qB2, qSUC2, qSL2, qINT2 located between SSR markers UGSM31₅₄₈ and UGSM31₆₄₉. These QTLs could be put into use in marker assisted breeding.  相似文献   

Mapping quantitative trait loci (QTL) for grain size in rice using a RIL population from Basmati × indica cross showing high segregation distortion     

P. S. Shanmugavadivel  S. V. Amitha Mithra  P. Dokku  K. Anand Raj Kumar  G. J. N. Rao  V. P. Singh  A. K. Singh  N. K. Singh  T. Mohapatra 《Euphytica》2013,194(3):401-416

Grain size is one of the three productivity related traits in rice and hence a major target for genetic improvement. Since understanding genetic variation in grain size between Basmati and indica genotypes is important for rice improvement, a recombinant inbred population was developed from a traditional aromatic cultivar ‘Basmati 370’ and a non-aromatic indica genotype ‘IRBB60’. This population was phenotyped in two locations for grain length (GL), grain breadth (GB), GL/GB ratio (LBR) and grain weight (GW). Though the RIL population reported in the current study exhibited segregation distortion (SD) for 54 % of the markers, they were utilized in analysis using an appropriate statistical package, PROC QTL in the SAS environment. Interval mapping revealed a total of 15 QTLs for GL, seven for GB, 15 for LBR and two for GW. Among them 13 were not reported earlier and thus novel. For a known major QTL identified in the study, GW8 for GB, a PCR based functional marker was designed and validated. This is the first report wherein a very high proportion of markers (>50 %) exhibiting SD have been successfully used for QTL mapping.  相似文献   

Effect of micronutrient supplementation around calving on the plasma cortisol levels of Murrah buffaloes and Sahiwal and Karan Fries cows     

Ajay Kumar Dang  Manu Jamwal  Mandheer Kaur  Shiv Prasad Kimothi  Shashi Pal  Kalyan De  Mohsin M. Pathan  Dilip K. Swain  Sushil K. Mohapatra  Suman Kapila  Rajeev Kapila  Harjit Kaur  Ashok K. Mohanty  Bukkaraya S. Prakash 《Tropical animal health and production》2013,45(4):1047-1050

Micronutrients when fed around peripartum may reduce the stress induced by cortisol. With this objective, 24 Sahiwal (SW) and 24 Karan Fries (KF) cows and 24 Murrah (Mu) buffaloes were taken and divided into four groups of six each. Vitamin E (VE), zinc (Zn) and copper were supplemented from 30 days pre- to 30 days postcalving in groups 1, 2 and 3. Animals without supplementation served as control. Blood sampling was done on days 30, 15, 7 and 3 precalving; at calving; and on days 3, 7, 15 and 30 postcalving. Plasma cortisol levels were measured by ELISA. Supplementation of VE and Zn significantly (P?<?0.05) reduced plasma cortisol levels at calving and at 30 days postcalving. KF cows exhibited best results with VE, whereas SW cows and Mu buffaloes responded best to Zn. Copper increased the peripartum cortisol levels. Reduction in cortisol levels may help in keeping the animal healthy and stronger to fight immuno-suppression generally observed around the period of peripartum.  相似文献   

Integrating marker assisted background analysis with foreground selection for identification of superior bacterial blight resistant recombinants in Basmati rice     

S. Gopalakrishnan    R. K. Sharma    K. Anand Rajkumar  M. Joseph    V. P. Singh    A. K. Singh    K. V. Bhat    N. K. Singh    T. Mohapatra 《Plant Breeding》2008,127(2):131-139

Basmati rice is highly susceptible to bacterial blight (BB) caused by Xanthomonas oryzae pv. oryzae. Transfer of BB resistance genes from non‐Basmati sources to Basmati through cross‐hybridization requires strict monitoring for recovery of the desirable Basmati quality traits in the recombinants, which show complex inheritance pattern. We integrated background analysis using mapped microsatellite markers with foreground selection to identify superior lines that combine useful genes from a non‐Basmati BB resistance donor line IRBB55 with grain and cooking quality characteristics of the popular Basmati rice variety ‘Pusa Basmati 1’ (PB 1) employing backcross pedigree strategy. Foreground selection using linked markers ensured presence of two genes, xa13 and Xa21 for BB resistance from IRBB55, and the recurrent parent PB 1 allele for the waxy locus giving intermediate amylose content and maintainer allele at fertility restorer locus in the BC₁F₅ recombinants. Background analysis enabled selection of recombinants with recurrent parent genome to the extent of 86.3% along with the quality traits. The extent of introgression of non‐Basmati donor chromosome segments in the superior selections was estimated to be < 7.8 Mb and < 6.7 Mb in the xa13 and Xa21 linked genomic regions, respectively. Association mapping identified three quantitative trait loci, one each for 1000‐grain weight, fertile grains/panicle and cooked kernel length. The backcross‐pedigree breeding strategy facilitated recovery of additional desirable characteristics from the donor in some of the selections. The elite selection Pusa 1460‐01‐32‐6‐7‐67 with maximum genomic background and quality characteristics of the recurrent Basmati parent gave resistance reaction against BB, similar to that of the non‐Basmati resistant check variety and recorded an yield advantage of 11.9% over the best check in the multiplication agronomic trial in the Basmati growing region of India. This line, which has been released as a new variety in the name of ‘Improved Pusa Basmati 1’ for commercial cultivation in India, is an example of successful application of marker assisted selection to variety development.  相似文献   

Differential RNA Editing of Mitochondrial Genes in WA-Cytoplasmic Based Male Sterile Line Pusa 6A,and Its Maintainer and Restorer Lines     

Umakanta NGANGKHAM  Swarup Kumar PARIDA  Ashok Kumar SINGH  Trilochan MOHAPATRA 《水稻科学》2019,26(5):282-289

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Behaviour of trifloxystrobin and tebuconazole on grapes under semi‐arid tropical climatic conditions     

Soudamini Mohapatra  Ashok K Ahuja  M Deepa  GK Jagadish  GS Prakash  Sampath Kumar 《Pest management science》2010,66(8):910-915

BACKGROUND: A mixture of trifloxystrobin and tebuconazole is excellent in controlling both powdery and downy mildew of grapes. The objective of the present work was to study the behaviour of trifloxystrobin and tebuconazole on grape berries and soil following treatment with Nativo 75 WG, a formulation containing both fungicides (trifloxystrobin 250 + tebuconazole 500 g kg^?1). This study was carried out for planned registration of this mixture for use on grapes in India. RESULTS: Initial residue deposits of trifloxystrobin and tebuconazole on grapes were below their maximum residue limit (MRL) of 0.5 and 2 mg kg^?1, respectively, when Nativo 75 WG was applied at the recommended dose of 175 g product ha^?1. The residues dissipated gradually to 0.02 and 0.05 mg kg^?1 by 30 days, and were below the quantifiable limit of 0.01 mg kg^?1 at the time of harvest (60 days after the last treatment). Trifloxystrobin and tebuconazole dissipated at a pre‐harvest interval (PHI) of 36 and 34 days, respectively, from the recommended treatment dose. The acid metabolite of trifloxystrobin, CGA 321 113, was not detected in grape berries at any point in time. Soil at harvest was free of any pesticide residues. CONCLUSION: Residue levels of both trifloxystrobin and tebuconazole were below MRLs when grapes were harvested 30 days after the last of four applications of 175 g product ha^?1 (trifloxystrobin 44 g AI ha^?1, tebuconazole 88 g AI ha^?1) under the semi‐arid tropical climatic conditions of India. Copyright © 2010 Society of Chemical Industry  相似文献   

Identification and fine mapping of a new gene, <Emphasis Type="Italic">BPH31</Emphasis> conferring resistance to brown planthopper biotype 4 of India to improve rice, <Emphasis Type="Italic">Oryza sativa</Emphasis> L     

G. D. Prahalada  N. Shivakumar  H. C. Lohithaswa  D. K. Sidde Gowda  G. Ramkumar  Sung-Ryul Kim  C. Ramachandra  Shailaja Hittalmani  Trilochan Mohapatra  Kshirod K. Jena 《Rice》2017,10(1):41

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Estimation of combining ability in broilers from a full diallel cross     

C. K. Aggarwal  S. C. Mohapatra  S. P. Sinha  P. N. Sharma  S. D. Ahuja 《British poultry science》1979,20(2):185-190

1. A 4 × 4 complete diallel cross involving four broiler strains (two of Cornish stock and two of Rock stock) was made. Twelve males from each strain were concurrently mated to three pullets from each strain in single sire pens.

2. Body weight was measured from 1‐d‐old to 10 weeks of age every two weeks in the 2880 progeny obtained in five hatches.

3. General combining ability was highly significant for all traits except body weight at 1 d old. The specific combining ability was significant for 4‐, 8‐ and 10‐week body weights.

4. Maternal effects were evident for body weights at earlier ages but gradually declined with advancing age and were non‐significant for 8‐ and 10‐week weights.

5. Sex‐linked effects, although smaller in magnitude, were evident for body weights up to 6 weeks of age.  相似文献