Cyclone vulnerability zonation of southern part of South Andaman, India using Multi-criteria weighted overlay analysis techniques

1181-1190Cyclones are one of the major natural hazards which frequently batter Andaman and Nicobar Islands (ANI). Cyclone ‘Lehar’ made its first landfall south of Port Blair, ANI, early on 25th November 2013. Hence an attempt was made to demarcate flood vulnerable zone due to cyclone, at the outset of cyclone ‘Lehar’ which can facilitate the district administration involved in disaster mitigation and management in confronting any disaster of similar kind in future using geospatial technology. Four parameters viz., Land use and land cover (LULC), geomorphology, slope and demographic data were used as input for demarcating cyclone vulnerability zones. The present study revealed that 14.49%, 44.34% and 23.86% of the coastline is in the high, moderate and low vulnerable category respectively

MICROSATELLITE ANALYSIS OF INTRA CULTIVAR DIVERSITY IN \u2018CHINNARASAM\u2019 MANGO FROM ANDHRA PRADESH, INDIA

\u2018Chinnarasam\u2019, a juicy cultivar of mango ( Mangifera indica L.), is among the most important mangoes of an Indian State of Andhra Pradesh, whose production and quality is variable across the State. Twenty accessions of \u2018Chinnarasam\u2019 (CR Acc-l to CR Acc-20) were selected from 9 locations spread over 6 districts, representing all the three eco-geographical regions (Coastal Andhra, Rayalaseema and Telangana) of Andhra Pradesh. Their leaves were sampled to study intracultivar diversity following microsatellite analysis. The dendrogram generated based on unweighted pair group mean with arithmetic average, showed three major groups of accessions, which followed geographical separation. Twenty out of 109 mango-specific microsatellites validated, were polymorphic (18.34%). Microsatellites produced a total of 62 alleles, of which 31 were polymorphic (50%). The Jaccard\u2019s similarity coefficient ranged from 0.54 to 1.00. Existence of intracultivar genetic diversity (up to 46%) indicates that \u2018Chinnarasam\u2019 whatsoever cultivated throughout the State is not a pure clone, which allows the genetic breeding of this cultivar by means of mass selection. Microsatellite markers have proven useful in assessing intracultivar genetic diversity and identifying accessions of \u2018Chinnarasam\u2019 cultivar.\u2018Chinnarasam\u2019, un cultivar juteux du manguier ( Mangifera indica L.), est parmi les manguiers d\u2019un Etat indien d\u2019Andhra Pradesh, dont la production et la qualit\ue9 sont variables \ue0 travers la r\ue9gion. Vingt nouvelles accessions de \u2018Chinnarasam\u2019 (CR Acc-l \ue0 CR Acc-20) \ue9taient s\ue9lectionn\ue9es parmi 9 lieux de propagation sur 6 districts repr\ue9sentant toutes les trois r\ue9gions eco-g\ue9ographiques d\u2019Andhra Pradesh (la partie coti\ue8re d\u2019 Andhra, Rayalaseema et Telangana). Leurs feuilles \ue9taient \ue9chantillonn\ue9es pour \ue9tudier la diversit\ue9 intracultivar suivant l\u2019analyse microsatellite. Le dendrogramme g\ue9n\ue9r\ue9 sur base de la moyenne du groupe paire non pond\ue9r\ue9e avec la moyenne arithm\ue9tique a montr\ue9 trois groupes importants d\u2019 accessions en rapport avec la s\ue9paration g\ue9ographique. Vingt sur 109 microsatellites sp\ue9cifiques de manguiers valid\ue9s \ue9taient polymorphes (18.34 %). Les microsatellites ont produit un total de 62 all\ue8les parmi lesquelles 31 \ue9taient polymorphes (50 %). Le coefficient de similarit\ue9 de Jaccard variait de 0.54 \ue0 1.00. L\u2019existence de diversit\ue9 g\ue9n\ue9tique intracultivar (jusqu\u2019\ue0 46 %) indique que le \u2018Chinnarasam\u2019 cultiv\ue9 \ue0 travers l\u2019 Etat n\u2019est pas un clone pur, ce qui permet l\u2019am\ue9lioration g\ue9n\ue9tique de ce cultivar par le moyen de la s\ue9lection massive. Les marqueurs microsatellites se sont av\ue9r\ue9s utiles dans l\u2019\ue9valuation de la diversit\ue9 g\ue9n\ue9tique intracultivar et l\u2019identification des accessions du cultivar \u2018Chinnarasam\u2019

MICROSATELLITE ANALYSIS OF INTRA CULTIVAR DIVERSITY IN ‘CHINNARASAM’ MANGO FROM ANDHRA PRADESH, INDIA

‘Chinnarasam’, a juicy cultivar of mango ( Mangifera indica L.), is among the most important mangoes of an Indian State of Andhra Pradesh, whose production and quality is variable across the State. Twenty accessions of ‘Chinnarasam’ (CR Acc-l to CR Acc-20) were selected from 9 locations spread over 6 districts, representing all the three eco-geographical regions (Coastal Andhra, Rayalaseema and Telangana) of Andhra Pradesh. Their leaves were sampled to study intracultivar diversity following microsatellite analysis. The dendrogram generated based on unweighted pair group mean with arithmetic average, showed three major groups of accessions, which followed geographical separation. Twenty out of 109 mango-specific microsatellites validated, were polymorphic (18.34%). Microsatellites produced a total of 62 alleles, of which 31 were polymorphic (50%). The Jaccard’s similarity coefficient ranged from 0.54 to 1.00. Existence of intracultivar genetic diversity (up to 46%) indicates that ‘Chinnarasam’ whatsoever cultivated throughout the State is not a pure clone, which allows the genetic breeding of this cultivar by means of mass selection. Microsatellite markers have proven useful in assessing intracultivar genetic diversity and identifying accessions of ‘Chinnarasam’ cultivar.‘Chinnarasam’, un cultivar juteux du manguier ( Mangifera indica L.), est parmi les manguiers d’un Etat indien d’Andhra Pradesh, dont la production et la qualité sont variables à travers la région. Vingt nouvelles accessions de ‘Chinnarasam’ (CR Acc-l à CR Acc-20) étaient sélectionnées parmi 9 lieux de propagation sur 6 districts représentant toutes les trois régions eco-géographiques d’Andhra Pradesh (la partie cotière d’ Andhra, Rayalaseema et Telangana). Leurs feuilles étaient échantillonnées pour étudier la diversité intracultivar suivant l’analyse microsatellite. Le dendrogramme généré sur base de la moyenne du groupe paire non pondérée avec la moyenne arithmétique a montré trois groupes importants d’ accessions en rapport avec la séparation géographique. Vingt sur 109 microsatellites spécifiques de manguiers validés étaient polymorphes (18.34 %). Les microsatellites ont produit un total de 62 allèles parmi lesquelles 31 étaient polymorphes (50 %). Le coefficient de similarité de Jaccard variait de 0.54 à 1.00. L’existence de diversité génétique intracultivar (jusqu’à 46 %) indique que le ‘Chinnarasam’ cultivé à travers l’ Etat n’est pas un clone pur, ce qui permet l’amélioration génétique de ce cultivar par le moyen de la sélection massive. Les marqueurs microsatellites se sont avérés utiles dans l’évaluation de la diversité génétique intracultivar et l’identification des accessions du cultivar ‘Chinnarasam’