Rice Science ›› 2021, Vol. 28 ›› Issue (3): 279-288.DOI: 10.1016/j.rsci.2020.08.001

• Research Paper • Previous Articles     Next Articles

Evaluation of Inherited Resistance Genes of Bacterial Leaf Blight, Blast and Drought Tolerance in Improved Rice Lines

Silas Akos Ibrahim1,2, Y. Rafii Mohd1,3(), Razi Ismail Mohd1,3, Izan Ramlee Shairul3, Abd Aziz Shamsudin Noraziyah4, Ramli Asfaliza5, Chibuike Chukwu Samuel1, Swaray Senesie3, Jalloh Momodu3   

  1. 1Laboratory of Climate-Smart Food Crop Production, Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
    2Department of Crop Science, Faculty of Agriculture, Kaduna State University, 801 Kafanchan, Kaduna 801139, Nigeria
    3Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
    4School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia
    5Rice Research Centre, Malaysian Agricultural Research and Development Institute, Serdang 43400, Selangor, Malaysia
  • Received:2020-02-10 Accepted:2020-08-06 Online:2021-05-28 Published:2021-05-28

Abstract:

Improved rice lines were developed frome three parents with the resistance or tolerance to bacterial leaf blight, blast and drought stress, respectively, using single-, double- and three-way crosses. The improved lines were assessed for agro-morphological and yield traits under non-drought stress (NS) and reproductive-stage drought stress (RS) treatments. The mean comparison of traits measured between parent plants and progenies (improved lines) were similar, and there were significant and non-significant differences among the parents and improved lines (genotypes) under NS and RS. Smilarly, there was significant and non-significant differences in the interaction among both parent varieties and improved lines for NS and RS. Cluster and 3D-model of principal component analysis did not generate categorical clusters according to crossing methods, and there were no exclusive crossing method inclined variations under the treatments. The improved lines were high-yielding, disease resistant, and drought-tolerant compared with their parents. All the crossing methods were good for this crop improvement program without preference to any, despite the number of genes introgressed.

Key words: rice, bacteria leaf blight, blast, drought tolerance, resistance gene