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Singh, Bikram
- Estimates of Genetic Variability and Correlation in Eucalyptus Hybrid Progeny For Early Selection
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Correlation, Candidate Plus Tree, Eucalyptus Hybrid
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Indian Forester, Vol 135, No 2 (2009), Pagination: 147-161Abstract
A trial of progeny of 11 Candidate Plus Trees (CPTs), 2 sources of clonally propagated planting material and one source of clonal seed orchard seedlings was conducted at Thathlan, Hoshairpur (Punjab) to assess the growth performance and to evaluate genetic variability and correlation among different growth characters for three consecutive years. In all quantitative characters assessed, clonal material viz. T9, T1 and T10 gave the best height, diameter and clean bole. The heritability values for height (0.67 to 0.71), diameter (0.50-0.59) and clean bole (0.64-0.76) were high with high genetic gains upto three year of observations. The findings suggest that these characters are governed by the genetic make up of the trait and attribute significantly to the phenotypic performance at early stage giving ample opportunity for selection of the outstanding genotypes. Similarly, straightness exhibited high heritability varying from 0.55 to 0.64 during the first and third year respectively. The heritability estimate for axis persistence ranged from 0.46 to 0.56 with high genetic gain of 21.10 to 14.63 in year one and three respectively. The significant genotypic and phenotypic correlation found between height and diameter suggests that improvement in one character will be accompanied by another. Also a high positive significant correlation was exhibited in year one to three. A highly significant age-age correlation for height and diameter growth indicate that selection based on these two characters can be done at the juvenile stage to achieve more gain per unit time.Keywords
Genetic Variability, Heritability, Genetic Gain, Genetic Correlation, Age-ageCorrelation, Candidate Plus Tree, Eucalyptus Hybrid
- An Approach to Ensure Year Round Availability of Germinating Seeds of Cassia tora for Industrial Application
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Indian Forester, Vol 134, No 8 (2008), Pagination: 1011-1016Abstract
Cassia tora seeds were subjected to four different pre-treatments and different incubation temperatures. Seeds treated with conc. sulphuric acid were found to be best of the pretreatments. Increase in speed and capacity of seed germination was achieved by incubating seeds at higher temperature in comparison to lower temperatures.Keywords
Cassia tora, Seed Germination, Pre-treatments- Carbon Sequestration and Mitigation through Conservation Approach
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Indian Forester, Vol 133, No 4 (2007), Pagination: 475-483Abstract
Forest has a substantial prospective to mitigate the accumulation of green house gases by number of forestry options available. The policy makers adoption of broad goals for GHG reduction though has considerable potential to alleviate the buildup carbon. The Clean Development Mechanism (CDM) offers benefits through sink credits and reduces the negative impact of climate change. The paper elucidates the working of CDM, the manifold effect on carbon sink, harvestable wood products, flow of energy and nutrient as well as biodiversity conservation through mixed-species-plantation, the multistrata dynamics of carbon sequestration and management of afforestation and reforestation activities for mitigation.- Assessment of Exotic Poplar Clones in Punjab
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Indian Forester, Vol 133, No 7 (2007), Pagination: 861-869Abstract
A clonal trial of 108 exotic poplar clones obtained from the F.R.I., Dehra Dun and the Silviculturist Sal Region Nanital was conducted at Pindori, Hoshiarpur (Punjab) from 1988 to 2004. Growth data recorded at the age of 1, 4 and 16 years was analysed statistically. On the basis of performance in height and diameter growth during 1992 and 2004 and further ranking according to d2h values obtained, a grading list of best clones was prepared separately for short-rotation and long-rotation crops for conditions prevailing in Punjab. PD-6248, P-Del Pux, PD-Booialane, PD-6388, PL-52/82, PD-6252, P.G-48, PD-6238 and PD-6257 clones performed best both in short and long rotations whereas EL-89/82, P.S7C4, PD-6371, L-27/82, CP-82-6-14 and P.G-3 are recommended for short-rotation crops.- Assessment of 51 Progenies of Melia azedarach Linn. - a Promising Agroforestry Tree
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Indian Forester, Vol 132, No 8 (2006), Pagination: 941-951Abstract
Melia azedarach is a promising agro-forestry tree. Assessment of 9-months old progeny trial of this species consisting of 51 progenies from Punjab, Haryana and Uttaranchal established at Kharkan; Hoshiarpur, Punjab was done. In terms of height and diameter growth progeny No. 14 (Takni, Hoshiarpur) performed the best. Results of analysis of variance for height, diameter at breast height, diameter at ground level, crown diameter, clear bole formation and d2h were highly significant at 1% level of probability. Highest variance (89.75%) was found in d2h whereas the minimum in height trait (20.50%). The heritability estimate for height was the highest (0.44 ± 0.086) followed by d2h, dbh, diameter at ground level and clear bole formation. Contribution of environmental conditions was found higher than the genetic factors. Phenotypic and genotypic coefficients of variation point out that height and diameter traits can be relied upon for early selection for tree improvement in this species. Cluster analysis revealed that progeny No. 14 and 46 were distantly apart. Principal Component Analysis (PCA) showed that PC-I captured 77.8% of the total variance of which diameter and height exhibited the highest. Based on the results of growth performance and cluster analysis progeny No. 14 proved the best performer. The other 10 promising progenies are ranked on the basis of PCA.- Variation and Genetic Correlation in Growth and Branching Characters of Populus deltoides Bartr. Clones
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Indian Forester, Vol 139, No 8 (2013), Pagination: 667-673Abstract
The function of proleptic branch, sylleptic branch and early bud-break were observed for contributing diameter and height growth potentials for the Populus deltoides clones from 12 provinces of United States. The variance components, heritability estimates and genetic correlation for growth and branching traits were investigated at the age one and two for 100 best clones belonging to 17 families planted in complete randomized block design with three replications. The clones T43, T44, T33, T48, T45 followed by T38 exhibited better performances for the traits like BRPD and dbh. Trends in genetic and phenotypic parameters for growth and branching traits during early stages to obtain information necessary to scrutinize and seek manageable clones for early selection have been studied.Keywords
Clones, Proleptic Branch, Sylleptic Branch, Heritability, Genotypic Correlation, Populus deltoides- Phytoecdysteroid Profiling of Silene vulgaris by UPLC-ESI-MS
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Authors
Affiliations
1 Natural Products Chemistry and Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur 176 061, IN
1 Natural Products Chemistry and Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur 176 061, IN
Source
Current Science, Vol 113, No 10 (2017), Pagination: 1986-1992Abstract
Silene vulgaris is a wild edible plant consumed in both raw as well as cooked forms in several parts of Europe. The phytoconstituents of Silene species include phytoecdysteroids, triterpenoidal saponins, terpenoids, flavonoids and phenolics. Silene vulgaris is a relatively unexplored species and the chemical profiling of this plant has not been attempted so far. Hence the UPLC-ESI-MS approach was applied to the extracts of flowers, leaves and ischolar_mains of S. vulgaris for the profiling of phytoecdysteroids. The relative distribution of these compounds varied between flowers and leaves; however, the qualitative composition was similar. Only traces of phytoecdysteroids were present in the ischolar_mains. The aglycones, sugars and other moieties were determined on the basis of ESI-MS. A total of eight previously known phytoecdysteroids were identified. Partial characterization of eight other phytoecdysteroids was also attempted.Keywords
Chemical Profiling, Chromatographic Analysis, Phytoecdysteroids, Silene vulgaris.Full Text
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- 5α/5β Stereochemistry of Spirostanol and Furostanol Saponins
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Authors
Affiliations
1 Natural Products Chemistry and Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur 176 061, IN
2 Near Neugal Chowk, P.O. Bandla, Tea Estate, Palampur - 176 061, IN
1 Natural Products Chemistry and Process Development Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur 176 061, IN
2 Near Neugal Chowk, P.O. Bandla, Tea Estate, Palampur - 176 061, IN
Source
Current Science, Vol 115, No 4 (2018), Pagination: 618-621Abstract
Steroidal saponins constitute an important class of plant secondary metabolites and are mostly found in monocotyledonous angiosperms. These compounds are known to possess a vast array of bioactivities, including anticancer, adjuvant, immunostimulant, anti-inflammatory, antimicrobial, hypocholesterolaemic, antimicrobial and antioxidant1,2. Structurally, steroidal saponins are classified as spirostanol and furostanol glycosides3. A third and relatively less common class of steroidal saponins is furospirostanols. The saponins of this class generally have a polyoxygenated A-ring and/or one or more double bonds present in the rings A and B4.Full Text
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