Genetic variability of panicle architecture in indigenous rice landraces of Koraput region of Eastern Ghats of India for
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RESEARCH ARTICLE
Genetic variability of panicle architecture in indigenous rice landraces of Koraput region of Eastern Ghats of India for crop improvement Debabrata Panda1
•
Neelamadhab Sahu1 • Prafulla K. Behera1 • Kartik Lenka2
Received: 12 August 2020 / Revised: 12 August 2020 / Accepted: 18 August 2020 Ó Prof. H.S. Srivastava Foundation for Science and Society 2020
Abstract Panicle architecture is an important character that influence reproductive success and contributes directly to grain yield. In the present study, we evaluated diversity of panicle traits in 77 indigenous rice landraces from Koraput and compared with three popularity cultivated hybrid varieties of the locality for possibility of using in crop improvement program. Significant morphological variations of panicle traits such as panicle number, panicle angle, panicle weight, panicle length, grain number and grain weight were recorded in studied rice landraces. Based on the principal component analysis, first two axis of principal component captures 56.34% of the total variation and indicated significant variability of panicle traits among the genotypes. Panicle length, panicle weight, grain number and flag leaf area are the major determinants of phenotypic diversity. Multiple correlation between traits indicated that panicle weight in studied rice landraces were positively correlated with panicle number, grain number and leaf area and negatively associated with panicle length, panicle angle and chaff number. The genetic advance as percentage of mean (GAM) ranged from 22.19% for panicle length to 147.02% for panicle angle. High GAM along with heritability was observed for panicle number, panicle
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12298-020-00871-6) contains supplementary material, which is available to authorized users. & Debabrata Panda [email protected] 1
Department of Biodiversity and Conservation of Natural Resources, Central University of Odisha, Koraput, Odisha 764021, India
2
MS Swaminathan Research Foundation, Jeypore, Koraput, Odisha 764002, India
weight, grain number and chaff number and are important traits for selection during crop improvement. Some of the landraces such as Matidhan, Bhatagurumukhi, Chiklakoli and Kamuntana remarkably showed superior panicle weight along with higher grain number and length of panicle, which can be used in the future rice breeding program. Keywords Genotypic variation Panicle phenotyping Panicle traits Rice landraces Principal component analysis
Introduction Rice (Oryza sativa L.) is an important food crops consumed by more than 50% of the world population (Scheben et al. 2016). The global demand for rice production in 2025 is 758 million tonnes, which is significantly higher than the present level of around 600 million tonnes (Nakano et al. 2019). The yield potential of rice needs to be increased to support the burgeoning human population, which can only be underpinned by an increase in grain number for increasing crop yiel
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