Plant Soil Environ., 2003, 49(4):176-182 | DOI: 10.17221/4110-PSE

Analysis of genetic relationships between populations of cashew (Anacardium occidentale L.) by using morphological characterisation and RAPD markers

S. Samal, G.R. Rout, Lenka P.C.
1 Orissa University of Agriculture and Technology, Bhubaneswar, Orissa, India
2 Regional Plant Resource Centre, Nayapalli, Bhubaneswar, Orissa, India

In the present paper genetic relationships of twenty varieties of cashew are described on the basis of morphological characters and RAPD (Randomly Amplified Polymorphic DNA) markers. Results obtained for the phenotypic characters based on similarity coefficient were divided into four clusters with 70% similarity. By means of similarity coefficients (SG), cluster I was found to consist of twelve varieties. Cluster II consisted of a single variety, NRCC-1, cluster III consisted of six varieties and cluster IV had only one variety, Vridhachalam-2. The analysis started by using RAPD markers that allowed us to distinguish 20 varieties. A total of 80 distinct DNA fragments ranging from 0.2 to 3.0 kb were amplified by using 11 selected random 10-mer primers. Genetic similarity analysis was conducted for the presence or absence of bands in the RAPD profile. Cluster analysis clearly showed that 20 varieties of cashew grouped into two major clusters based on similarity indices. The first major cluster comprised one minor cluster. The other major cluster was divided into two sub-minor clusters, one sub-minor cluster having three varieties and the other sub-minor cluster was represented by 15 varieties. Among the 20 varieties, Ullal-3 and Dhana (H-1608) showed the highest similarity indices (87%). It was noted that Vengurla-2 and Vengurla-3 were not grouped into a single cluster but Vengurla-4 has 82% similarity to Vengurla-3. The variety Vengurla-2 has very close similarity (85%) with variety Vridhachalam-3 (M-26/2). The analysis of genetic relationships in cashew using morphological traits and RAPD banding data can be useful for plant improvement, descriptions of new varieties and also for assessment of variety purity in plant certification programmes.

Keywords: Anacardium occidentale; genetic similarity; morphological character; RAPD marker

Published: April 30, 2003  Show citation

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Samal S, Rout GR, Lenka PC. Analysis of genetic relationships between populations of cashew (Anacardium occidentale L.) by using morphological characterisation and RAPD markers. Plant Soil Environ. 2003;49(4):176-182. doi: 10.17221/4110-PSE.
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