PJB-2025-1523
Evaluating rice blast resistance in Egyptian genotypes: a combined phenotypic and molecular approach
Asmaa S. Nofal, Said S. Soliman, Tarik A. Ismail, Hany Wafa, Areej S. Jalal, Salha Mesfer Alshamrani, Diaa Abd El-Moneim, Wael F. Shehata, Wessam F. Felemban, Rahma Alshamrani and Abdallah A. Hassanin
Abstract
Growing season is a critical factor for both short and long- aged traditional rice cultivation in Sri Lanka, where natural photoperiod fluctuates in a range of less than one hour within a season. However, the effect of planting time during two main seasons on agronomic characters and the yield of traditional rice remains unknown. To address this, ten accessions were selected to represent the seasonal variation in days to flowering (DF) among traditional rice accessions of Sri Lanka. These accessions were grown in the field at a single location, with twelve planting dates spaced at one-month intervals from November 2018 to October 2019, to study the effect of the growing period on agronomic traits and yield. DF variations of accessions across 12 months of the year suggested three patterns. Both, the accession and the planting date affected the DF, plant height at flowering (PH) and number of spikelets per first panicle (SPP) significantly (p<0.05). The regression relationship between DF and SPP was quadratic for accessions 4132, 5530, 4387, 4290, 4145, 4772, 4731, 6412 and, 2170, while accession 4237 and improved variety Bg 300 showed a positive linear association. These findings provide valuable insights into manipulating DF in rice breeding programmes to enhance adaptability to future adverse climatic conditions without compromising yield
To Cite this article:
Nofal, A.S., S.S. Soliman, T.A. Ismail, H. Wafa, A.S. Jalal, S.M. Alshamrani, D.A. El-Moneim, W.F. Shehata, W.F. Felemban, R. Alshamrani and A.A. Hassanin. 2025. Evaluating rice blast resistance in Egyptian genotypes: a combined phenotypic and molecular approach. Pak. J. Bot., 57(3): DOI: http://dx.doi.org/10.30848/PJB2025-3(14)
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