Asian Journal of Plant Sciences1682-39741812-5697Asian Network for Scientific Information10.3923/ajps.2023.465.472SintonFerrelly VenomHeeRobin Ah LimSamLum Mok32023223Background and Objective: Drought stress affects crop yield by more than 50%. The agronomic characteristics and yielding ability of different upland rice varieties collected in Sabah, Malaysia and to evaluate the response of upland rice varieties to drought stress at the flowering stage. Materials and Methods: There were seven upland rice varieties (Tadong, Kondoduvon, Tiga Bulan, Worik, Purak, Lombug, and Kalopak) and one lowland variety as control (Mahsuri) selected for this project. Water stress treatments (by adjusting soil moisture content, SMC) were conducted at the onset of the flowering stage. Results: The water stress treatments were T1 (control) (50% SMC), T2 (30% SMC) and T3 (15% SMC). From the application of drought treatments, Kondoduvon-T1 recorded the highest shoot dry mass of 153.57 g. Tadong-T1 recorded the highest 1000-grain weight (34.80 g). Purak-T1 achieved the highest percentage of filled grain 92.08%. The extrapolated yield is significantly and positively correlated with the total number of tillers and most of the yield component parameters. Conclusion: Overall, the variety of Purak performed better under drought stress and achieved the highest extrapolated yield and thus suggested to be the best candidate for producing drought tolerant and high-yielding rice variety in the future.]]>Chang, H. and M.R. Bonnette,2016Azadi, H., P. Keramati, F. Taheri, P. Rafiaani and D. Teklemariam et al.,2018Fen, L.L., M.R. Ismail, B. Zulkarami, M.S. Abdul Rahman and M.R. Islam,2015Zhang, J., S. Zhang, M. Cheng, H. Jiang and X. Zhang et al.,2018Nahar, S., L. Sahoo and B. Tanti,2018Hanafi, M.M., A. Hartinie, J. Shukor and T.M.M. Mahmud,2009Guimarães, C.M., A.P. de Castro, L.F. Stone and J.P. de Oliveira,2016Yang, W., S. Peng, R.C. Laza, R.M. Visperas and M.L. Dionisio-Sese,2007Yang, X.C. and C.M. Hwa,2008IRRI,2002Summers, E. and A. Peters,2017® University Edition: Tips for Students and Professors.]]>Patel, D.P., A. Das, G.C. Munda, P.K. Ghosh, J.S. Bordoloi and M. Kumar,2010Ashrafuzzaman, M., M.R. Islam, M.R. Ismail, S.M. Shahidullah and M.M. Hanif,2009Kato, Y., M. Okami and K. Katsura,2009Oryza sativa L.) in Japan.]]>Kamoshita, A., C.R. Babu, N.M. Boopathi and S. Fukai,2008Wang, F., F.M. Cheng and G.P. Zhang,2007Hossain, M.B., M.O. Islam and M. Hasanuzzaman,2008Lauteri, M., M. Haworth, R. Serraj, M.C. Monteverdi and M. Centritto,2014Grove, I.,2019Farooq, M., N. Kobayashi, O. Ito, A. Wahid and R. Serraj,2010Aremu, C.O., E.A. Alhassan, A.J. Asaleye, E. Alori, S. Ige and G. Nayan,2018Oryza sativa L).]]>Kharel, L., S.K. Ghimire, J. Shrestha, C.B. Kunwar and S. Sharma,2018Ihsan, M.Z., F.S. El-Nakhlawy, S.M. Ismail, S. Fahad and I. Daur,2016Kuşçu, H. and A.O. Demir,2012Liu, E., Y. Liu, G. Wu, S. Zeng and T.G.T. Thi et al.,2016Oryza sativa L.) via association and linkage analysis.]]>Jahan, N., M.M. Rahman, N.A. Khan, M.M. Hasan and M. Habib,2020Hu, W., Y. Cao, D.A. Loka, K.R. Harris-Shultz and R.J. Reiter et al.,2020Gossypium hirsutum L.) pollen fertility under drought by regulating carbohydrate metabolism in male tissues.]]>Sehgal, A., K. Sita, K.H.M. Siddique, R. Kumar and S. Bhogireddy et al.,2018Shi, W., X. Li, R.C. Schmidt, P.C. Struik, X. Yin and S.V.K. Jagadish,2018in vivo fertilization in response to high-temperature during flowering in hybrid and inbred rice.]]>Cattivelli, L., F. Rizza, F.W. Badeck, E. Mazzucotelli and A.M. Mastrangelo et al.,2008Sarvestani, Z.T., H. Pirdashti, S.A.M.M. Sanavy and H. Balouchi,2008Oryza sativa L.) cultivars.]]>Gao, X., C. Zou, X. Fan, F. Zhang and E. Hoffland,2006Mohapatra, P.K., R. Panigrahi and N.C. Turner,2011Fukushima, A.,2019Efisue, A.A., B.C. Umunna and J.A. Orluchukwu,2014Oyza sativa L.) in coastal region of Southern Nigeria.]]>Ogunbayo, S.A., D.K. Ojo, K.A. Sanni, M.G. Akinwale and B. Toulou et al.,2014Oryza sativa L.)]]>Yuan, S., B.A. Linquist, L.T. Wilson, K.G. Cassman and A.M. Stuart et al.,2021