Indigenous mango (Mangifera indica L.) varieties have unique aroma, taste, flavour, texture and size. The interactions among volatile compounds and with sugars and acids have a role in the distinct mango flavor. Murshidabad district of West Bengal has several indigenous mango varieties that have unique attributes like taste and aroma. The indigenous Champa mango variety of Murshidabad district has a distinct aroma very similar to that of the champaka flower (Michelia champaca L.). The present investigation was to determine if there was any phyto-chemical which could be responsible for the distinct and unique aroma present in the mango variety Champa. Eugenol, a phytogenic bioactive component frequently found in diversified herbal plants was found by GC-MS analysis of the methanolic extract of the fruit pulp of indigenous mango variety, Champa.
Many important varieties of field, horticultural and forestry species are conserved as Field Gene Banks (FGB). FGBs provide easy and ready access to conserved material for research as well as for use. Plant breeders are in need of a continuous supply of diverse and novel genetic diversity to produce new crop varieties able to cope with the impacts of changing cultivation conditions and climate change. FGB is one of the options of a complementary strategy for the conservation of germplasm of many plant species. Murshidabad and Malda, the once famous districts for Mango (Mangifera indica L.) diversity, districts of West Bengal are now facing tremendous genetic erosion of the mango germplasm. The Field gene bank will be an ex situ conservation approach. 25 (Twenty five) mango varieties were collected from Malda and Murshidabad districts and cuttings transferred to Gurudas College, Kolkata 700054 for conservation as Field Gene Bank. The mango germplasm accessions were collected with the assistance of the West Bengal Biodiversity Board (WBBB). Some of the valuable mango varieties viz. Bimli, Churmur, Dobani, Do Phala, Golap Bhog, Golap Khash, Molam Jam, collected from orchards of Malda and Murshidabad districts. As a field Gene Bank these varieties are readily accessible and useable for characterization and evaluation. These field gene banks will aid in documentation of the rich mango legacy of West Bengal and help in mango crop improvement.
The flowering phenomenon in mango is a complex one. Normally, it crops heavily in one year (on year) and bears less or no crop the following year (off year). Again, it yields heavily the next year. These alternate bearer fruit cultivars present a serious economic problem to fruit growers in West Bengal. Fruit set in Mango is a varietal character, depending upon several factors such as time of flowering, sex ratio, efficient cross-pollination and intensity of flower drop. Varieties differ from one another in these respects and this leads to varying fruit set in different varieties. Understanding the cellular and molecular mechanisms involved in regular and irregular bearing fruit varieties will assist in the development of flowering, identification of regulatory regions and factors implicated for regularity in bearing in mango. Transcriptomic data could be utilized for the synthesis of SSR and SNPs markers. Varieties both alternate and regular bearing need to be identified before the transcription profiling. In this investigation the variation among the 25 mango varieties conserved as field gene bank in the college campus of Gurudas College was assessed.
A clustergram or a heatmap is one of several techniques that directly visualize data without the need for dimensionality reduction. Heatmap is a representation of data in the form of a map or diagram in which data values are represented as colours. Cluster heatmaps have high data density, allowing them to compact large amounts of information into a small space. “ClustVis”, is a web tool for visualizing clustering of multivariate data using Principal Component Analysis and Heatmap. Using this web tool, genetic relationships among the traditional mango (Mangifera indica L.) varieties can be visualized. In this investigation ten (10) indigenous mango varieties were selected. These were elite varieties of Murshidabad viz. Anaras, Bhabani, Champa, Dilpasand, Kalabati, Kohinoor, Kohitoor, Molamjam. The morphological and biological characters were analyzed using this tool. Analysis and assessment of the current status of mango genetic resources will be important for ascertaining the relationship among traditional varieties. This data may be used for appropriate conservation and sustainable utilization measures. This information may also be needed to carry out breeding programs to develop improved cultivars for sustainable livelihoods of local communities.
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