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Home > Archive>Volume 25, Issue 9, 2024 >1441-1453. DOI:10.13430/j.cnki.jpgr.20231127001
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Rescue Collection and Preliminary Identification of Disease Resistance of Wild Rice Germplasm Resources in Guangxi
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Affiliation:

1.Institute of Crop Sciences，Chinese Academy of Agricultural Sciences，Beijing 100081;2.Rice Research Institute，Guangxi Academy of Agricultural Sciences，Nanning 530007;3.Guangxi Conservation Station of Agricultural Ecology and Resource，Nanning 530022;4.Institute of Grain Crops，Hainan Academy of Agricultural Sciences，Haikou 570100

Fund Project:

Foundation projects： National Key R&D Program of China（2021YFD1200101）；Key R&D Program of Hainan（ZDYF2022XDNY260）；The Project of Sanya Yazhou Bay Science and Technology City（SCKJ-JYRC-2023-47）

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    Abstract:

    In view of the increasingly serious problem of the endangered status of wild rice in Guangxi， in order to rescue the germplasm resources of wild rice in Guangxi and explore its disease resistance genes， the areas with abundant wild rice resources in Guangxi were investigated and collected， and the resistance of white leaf blight and rice blast was identified in some of the collected resources. The results showed that only 24 of the 44 distribution points recorded in the wild rice field in Guangxi still had wild rice distribution， and the endangered situation was very serious， and the proportion of wild rice distribution points disappeared as high as 45.5% in the past 10 years， and the destruction of water sources and weed competition were the main threats to the survival of wild rice. According to the principle of wild rice sampling， a total of 317 germplasm resources from 11 groups of Oryza rufipogon Griff. and Oryza officinalis Wall. were rescued； The resistance to bacterial blight was identified by using the international virulent strain PXO99， and the resistance to rice blast of different isolates （ Guy11， RB22， FJ-3-2， FJ-3-5， FJ-2-3 ） was identified by wounding detached rice leaf. The results showed that 27 bacterial blight resistance resources， 105 rice blast resistance resources， and 5 resources with both bacterial blight resistance and rice blast resistance were identified from 177 wild rice. In view of the problem that the disease-resistant resources of wild rice in Guangxi are rich but disappear seriously， it is suggested to strengthen the collection and protection， and increase the identification of germplasm resources.

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History
  • Received:November 27,2023
  • Online: September 02,2024
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