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Shikha Thakur , N. S. K. Harsh

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Prashant Agarwal , Shikha Thakur , N. S. K. Harsh , A. K. sharma

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Shikha Thakur , N. S. K. Harsh

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Shubhra Bhandari ¹, N. S. K. Harsh ¹, A. K. Sharma ¹, L. Puni Mao ¹, Shikha Thakur ¹

Affiliations
1 Forest Pathology Division, Forest Research Institute, Dehradun, IN

Abstract

Medicinal plants play an important role in the development of potent therapeutic agents. Now-a-days large scale and commercialized cultivation has increased the number of diseases and their severity in medicinal plants. Among the bioagents fungal phytopathogens are found to cause certain foliar diseases which eventually play an important role in affecting overall health of the medicinal plants and their products. In the present study information about diseases of medicinal plants of Uttarakhand has been compiled to prepare a database.

Keywords

Medicinal Plants, Diseases, Fungi, Uttarakhand

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Shikha Thakur ¹, N. S. K. Harsh ¹

Affiliations
1 Forest Pathology Division, Forest Research Institute, Dehradun (Uttarakhand), IN

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I. K. Thakur ¹, Shikha Thakur ¹

Affiliations
1 Department of Tree Improvement and Genetic Resources, COF, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan - 173230 (H.P.), IN

Abstract

Seeds of Melia azedarach were collected from selected mother trees (ortets) one each at twenty seven locations, and progenies were raised to study the extent and pattern of variation with respect to growth characters. Site S₂₇ (Nauni) exhibited outstanding performance for these traits of progenies followed by S₁₄ (Ropar) and S₂₃ (Subathu), whereas S₂(Palu upper) showed the lowest values. High heritability with high genetic gain was observed for collar diameter (0.96 and 64.37 %), ischolar_main length (0.93 and 57.72 %) and ischolar_main-shoot length ratio (0.91 and 51.83 %). Highly significant and positive genotypic and phenotypic correlations were observed for majority of the characters. Plant height had significantly positive genotypic and phenotypic correlation with number of branches (0.85 and 0.82) and collar diameter (0.84 and 0.81) whereas collar diameter showed positive and significant genotypic and phenotypic correlation with number of branches (0.83 and 0.74) and number of leaves (0.70 and 0.65).

Keywords

Mother Trees, Progenies, Heritability, Genetic Gain, Correlation.

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I. K. Thakur ¹, Shikha Thakur ¹

Affiliations
1 Department of Tree Improvement and Genetic Resources, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan – 173 230 (H.P.), IN

Abstract

Mature seeds were collected from twenty seven mother trees (ortets) Melia azedarach selected at 27 sites, one ortet each at one site, from Himachal Pradesh and part of Punjab and their progenies were raised. Principal component analysis (PCA) was carried out taking 17 important parameters, proved useful in extracting the most important factors. Four principal components contributed 81.73% of total variance. First principal component contributed 44.51 % of total variation whereas the second component accounted for 21.69 % variation, the third explains 9.23 % of variation and the fourth component accounted for 6.24 % of the variation. In the first PCA high loadings for traits such as fresh shoot weight (0.916), dry shoot weight (0.911), dry ischolar_main weight (0.859), ischolar_main length (0.841), seedling height (0.773) and number of leaves (0.764) represented those which are important for selection and further improvement of the species. The study revealed that maximum weightage should be given to fresh shoot weight due to its maximum variable loading for the initial selection of progenies followed by dry shoot weight for the biomass improvement of the species.

Keywords

PCA, Quantitative Trait, Drek, Ortet, Component.

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