Evaluation of Rice Accessions for Anaerobic Germination, Yield and Attributing Parameters in Direct Seeded Rice condition

Author: Godwin Gilbert J., Agalya Jasmin S., Ramchander S., Indira Petchiammal K., Samundeswari R. and Dinesh Kumar P.

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Abstract

Improving the tolerance against anaerobic germination has been the leading target domain in lowland areas, especially in Direct Seeded Rice (DSR) conditions. Flash flooding is a major issue in lowland rice cultivation. Direct seeded rice is affected by anaerobic stress. Most higher yielding modern rice varieties die within a week of complete submergence, making them unsuitable alternatives of traditional rice landraces. The present study was carried out to identify the elite genotypes for tolerance against anaerobic germination and yield parameters among twenty-five diverse rice genotypes under DSR. Traits namely germination percentage, seedling height, days to 50% flowering, early seedling vigour, leaf length, leaf width, number of productive tillers, panicle length, panicle weight, number of filled grains, spikelet fertility, 1000 grain weight and single plant yield were recorded. Chitiraikar showed maximum germination percentage (100 %). The plant height was the highest in Garudan samba (124 cm). Chitiraikar showed the highest seedling vigour of 5185. Aanaikomban had 26 more productive tiller (26 Nos). Single plant yield was also greater in Aanaikomban (38.11 g). The genotypes Chitiraikar, Aanaikomban, Karunguruvai and CR1009 sub-1 had better performance when compared to other genotypes. The highest PCV% and GCV% were found in the early seedling vigour (92.56 % and 70.97%) and the lowest (moderate) in spikelet fertility (9.53% and 9.51 %). The traits viz., number of productive tillers (0.36**), panicle weight (0.64**), number of filled grains (0.211**), and 1000 grain weight (0.81**) exhibited a significant positive association with single plant yield. The results of the PCA exhibited that PC1, PC2 and PC3 accounted for 23.97 %, 18.47% and 14.14% variation respectively. Cluster analysis showed that cluster III had the highest mean and encompassed the major influencing traits. Six clusters were formed and the genotypes were grouped based according to their performance. Cluster I and II contains seven genotypes. Thus, choosing the genotypes with these important traits mentioned above can increase the tolerance for anaerobic germination in DSR condition.

Keywords

Rice, Abiotic stress, Anaerobic germination tolerance, Direct seeded rice, Screening

Conclusion

Recently, there has been a notable increase in interest surrounding the development and application of rice varieties that exhibit anaerobic germination tolerance in DSR condition. These particular lines have the capacity to enhance food production and provide resilience to the uncertainties brought about by climate change and global warming. The discoveries from this research pave the way for the enhancement of rice cultivars with anaerobic germination tolerance, given that these genetic resources encompass a wider spectrum of genetic diversity associated with anaerobic germination capabilities.

References

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How to cite this article

Godwin Gilbert J., Agalya Jasmin S., Ramchander S., Indira Petchiammal K., Samundeswari R. and Dinesh Kumar P. (2023). Evaluation of Rice Accessions for Anaerobic Germination, Yield and Attributing Parameters in Direct Seeded Rice condition. Biological Forum – An International Journal, 15(9): 330-339.