EVALUATION OF MOLECULAR AND PHENOTYPIC DIVERSITY AND PHYSIOLOGICAL RESPONSES OF MELIA DUBIA TO MOISTURE STRESS
| dc.contributor.advisor | Devakumar, A. S. | |
| dc.contributor.author | LOUSHAMBAM ROMEECHAND SINGH | |
| dc.date.accessioned | 2020-10-07T05:11:16Z | |
| dc.date.available | 2020-10-07T05:11:16Z | |
| dc.date.issued | 2019-10-25 | |
| dc.description.abstract | The present investigation was carried out to assess the genetic variability of Melia dubia germplasm lines through molecular approach using SSR markers. From the results it is found that forty-two accessions segregated into thirteen genetically distinct clusters, indicating genetic diversity at molecular level. Further, growth of these lines was evaluated for five years in the field which receives low rainfall of 660 mm annually. A wide variation in growth was noticed among the forty-two lines under field conditions. To assess the physiological reasons for variation in growth, a controlled experiment was conducted by selecting ten accessions, of which five were the best and five were poor performing at field level. These lines were vegetatively multiplied through softwood cuttings and grown at field capacity and at 50% of field capacity (stress). From this study the Accessions MD058, MD013 and MD111 recorded highest growth both under field capacity and at 50 % moisture stress, while lowest growth was noticed in MD126 and 69 which corroborate with their field performance. Germplasm lines that recorded highest growth has also recorded highest photosynthetic rates both under field capacity as well as at 50 % moistures stress and they also recorded higher WUE, better photosynthesis recovery rates after stress and had higher drought susceptible index. The above results suggest that photosynthetic ability of a plant is a primary driver of growth. From the above results accessions MD058, MD013 and MD111 were found to perform better under low rainfall conditions. | en_US |
| dc.identifier.other | Th-12515 | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810152677 | |
| dc.keywords | Melia dubia, Physiological, Germplasm . | en_US |
| dc.language.iso | English | en_US |
| dc.pages | 199 | en_US |
| dc.publisher | UNIVERSITY OF AGRICULTURAL SCIENCES, GKVK BENGALURU | en_US |
| dc.sub | Forestry | en_US |
| dc.theme | PHENOTYPIC DIVERSITY AND PHYSIOLOGICAL RESPONSES | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | EVALUATION OF MOLECULAR AND PHENOTYPIC DIVERSITY AND PHYSIOLOGICAL RESPONSES OF MELIA DUBIA TO MOISTURE STRESS | en_US |
| dc.type | Thesis | en_US |