Development of the core collection through advanced maximization strategy with heuristic approach in cashew (Anacardium occidentaleL.)
| Autor: | G. S. Mohana, M. G. Nayak |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Germplasm Heuristic Plant Science Maximization Agricultural engineering Variance (accounting) Biology 01 natural sciences 03 medical and health sciences Variable (computer science) Tree (descriptive set theory) Core (game theory) 030104 developmental biology Genetics Cluster analysis Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Plant Genetic Resources: Characterization and Utilization. 16:367-377 |
| ISSN: | 1479-263X 1479-2621 |
| Popis: | ICAR-Directorate of Cashew Research is the nodal agency for conducting cashew research and manages the largest field gene bank in India. Cashew is a perennial tree and needs more land and other resources to maintain accessions. Conservation through seeds is not feasible because of cross-pollination. Tissue culture efforts to regenerate plants from mature explants are not successful. Therefore, efficient management of the filed gene bank particularly utilization requires designation of the core collection representing the spectrum of diversity present in the entire collection. In this study, a relatively new technique, the advanced M strategy with heuristic approach was deployed to develop the core collection. Sixty-eight morphometric characters of 478 accessions were subjected to analysis resulting in the core collection of 49 accessions. Further, another core collection of same number was constituted byK-Means clustering to compare the efficiency of two approaches. The validation parameters like mean difference, variance difference, coincidence rate, variable rate and class coverage among others were employed for comparative analysis. The results of these parameters revealed that the core collection designated by heuristic approach was better able to efficiently represent and retain the diversity of the entire collection compared with the core identified by clustering approach. Future conservation and breeding efforts will be focused on establishing a separate block in the field gene bank having 49 accessions of cashew core collection. |
| Databáze: | OpenAIRE |
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