Pattern of genetic diversity in indigenous Ahu rice germplasm of Assam

DOI: 10.37992/2022.1301.012

  • M. K. Sarma,
  • A. S. Nizamuddin Ahmed,
  • Daizi Durba Saharia,
  • Manash P. Nath,
  • Jugal Talukdar,
  • N. Sonia Devi,
  • S. Dutta Deka,
  • S. Zaman and J. Bhuyan

Abstract

The north-eastern part of India including Assam is one of the key centres of diversity of cultivated rice. Among the diverse varietal types, Ahu group of varieties with their evolutionary significance being intermediate between indica and japonica deserves attention for their detailed evaluation and utilisation in crop improvement programme. This work was attempted to elucidate the pattern of genetic variation and genetic diversity in a set of 147 indigenous Ahu rice genotypes of Assam grown under rainfed upland direct seeded condition. Among the 13 traits under study, the highest genotypic coefficient of variation was exhibited by primary branches per plant followed by secondary branches per plant and grain yield. Heritability in broad sense was the highest for grain L: B ratio followed by grain width and grain length. More than 90% heritability in broad sense was, observed for all the traits except effective tillers per plant, panicle length and grain yield. The highest genetic advance as per cent of mean was observed for primary branches per plant followed by secondary branches per plant and grain yield. Hence, selection for these traits would be most effective for further genetic improvement. At the intermediate linkage distance, four main and nine sub clusters were obtained by Euclidean cluster analysis. Cluster III b was the largest containing 35 entries, which was followed by cluster I c containing 32 entries. The variety Chidon Ahu remained distinct from all other entries and belonged to cluster I b. Based on per se performances of the genotypes and their inter se distance, promising genotypes were suggested for hybridization in order to obtain desirable segregants for further genetic improvement of Ahu rices.

Keywords: Genetic variation, genetic divergence, Ahu rice, rainfed upland

Published
31-03-2022
How to Cite
M. K. Sarma, A. S. Nizamuddin Ahmed, Daizi Durba Saharia, Manash P. Nath, Jugal Talukdar, N. Sonia Devi, S. Dutta Deka, S. Zaman and J. Bhuyan
Pattern of genetic diversity in indigenous Ahu rice germplasm of Assam. 2022. Electronic Journal of Plant Breeding, 13 1, 21-27. Retrieved from https://ejplantbreeding.org/index.php/EJPB/article/view/4104
Issue
Vol 13 No 1 (2022): EJPB
Section
Research Article

It is certified that:

  • The corresponding author is fully responsible for any disputes arising due to the publication of his/her manuscript.
  • The article has been seen by all the authors who are satisfied with its form and content.
  • The sequence of names of authors in the by-line is as per their relative contribution to this experiment, giving due credit to all scientists who made notable contribution to it.
  • All the authors fully understand that inclusion of any other co-authors or exclusion of any co-authors is not possible once the article has been submitted to the journal.
  • The corresponding author takes full responsibility for this article.
  • The address of the organization where the research was conducted is given.
  • The article is exclusive for this journal, and the results reported here have not been sent (and will not be sent during its consideration by this journal) for publication in any other journal.
  • Authors agree to abide by the objective comments of referees and do agree to modify the article into a short note as per the recommendation, for publication in the Electronic Journal of Plant Breeding.
  • If published in Electronic Journal of Plant Breeding, the copyright of this article would vest with the Indian Society of Plant Breeders, who will have the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in it, and neither we nor our legal heirs will have any claims on royalty.