Correlation, path analysis and genetic diversity in Nerium oleander L. accessions for morphological, yield and quality traits

DOI: 10.37992/2024.1502.047

  • G. Ashokkumar,
  • S.T. Bini Sundar,
  • A. Jayajasmine,
  • C. Indu Rani and,
  • S. Vasanth

Abstract

Character association and genetic diversity analyses were performed in the present study for the morphological and yield traits of Nerium oleander L. accessions to find out the major contributing traits towards flower yield.  A panel of 20 diverse nerium accessions were evaluated at the Floriculture Research Station, Thovalai, Kanyakumari, Tamil Nadu during 2018 to 2022.  Correlation analysis revealed that number of flowers per spikes had highly significant and positive correlation with flower yield. From the path analysis, the number of flowers per spike, days for bud initiation, flower weight, plant height and number of shoots/plants were identified to have high positive direct effect on flower yield.  Clustering of nerium germplasm, revealed two distinct groups. Cluster I, comprising NI-1 to NI-19, suggested shared genetic traits among them, while Cluster II, represented by NI-20, showcases unique attributes. High inter-cluster distance between Cluster I and Cluster II suggested that the genotypes in these clusters had a significant degree of genetic diversity between them and that crossings between the genotypes in the cluster I with NI-20 would produce desirable transgressive segregants.

Keywords: Nerium , correlation, path analysis, cluster analysis

Published
02-07-2024
How to Cite
G. Ashokkumar, S.T. Bini Sundar, A. Jayajasmine, C. Indu Rani and, S. Vasanth

Correlation, path analysis and genetic diversity in Nerium oleander L. accessions for morphological, yield and quality traits

. 2024. Electronic Journal of Plant Breeding, 15 2, 364-369. Retrieved from https://ejplantbreeding.org/index.php/EJPB/article/view/5113
Issue
Vol 15 No 2 (2024): EJPB
Section
Research Article

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