Acta Agriculturae Zhejiangensis ›› 2026, Vol. 38 ›› Issue (5): 886-897.DOI: 10.3969/j.issn.1004-1524.20250509

• Horticultural Science • Previous Articles     Next Articles

Collection of Zizania latifolia germplasm resources and evaluation of resistance to leaf spot disease in different Zizania latifolia germplasm

HU Jianglong1(), JIANG Wanlong2, PENG Hui1, WU Juncheng2, ZHANG Zhen3, TANG Jintian1, ZHANG Yafen1, YE Zihong1,2,*()   

  1. 1 Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, College of Life Sciences, China Jiliang University, Hangzhou 310018, China
    2 College of Modern Science and Technology, China Jiliang University, Jinhua 322002, Zhejiang, China
    3 Wuzhen Town Agricultural Economic Service Center of Tongxiang City, Tongxiang 314501, Zhejiang, China
  • Received:2025-07-26 Online:2026-05-25 Published:2026-06-02

Abstract:

To investigate key traits such as maturity, type, and resistance to leaf spot disease in different cultivars of water bamboo (Zizania latifolia), this study collected 116 water bamboo varieties from 13 provinces (municipalities) in China. Systematic investigations were conducted on the maturity and fleshy stem morphology of each variety, alongside the isolation and morphological identification of their endophytic Ustilago esculenta. Furthermore, resistance to water bamboo leaf spot (Bipolaris oryzae) was evaluated through artificial inoculation with physiological race LY-H1 and subsequent disease index rating. The results indicated that among the collected germplasm, there were 53 double-harvest varieties and 63 single-harvest varieties. Mid-maturing types were predominant in both groups. Double-harvest varieties primarily exhibited conical stems, whereas single-harvest varieties were mostly elongated. Meanwhile, 103 endophytic U. esculenta strains were successfully isolated, with colony morphologies primarily classified into dense mycelium-type and spore-type. The dense mycelium-type exhibited three morphologies: curly growth type, adherent growth type, and elevated growth type, while the spore-type exhibited two morphologies: granular type and wrinkled type.Additionally, single-harvest varieties generally demonstrated stronger resistance to B. oryzae than double-harvest varieties. This study provides valuable germplasm materials and a scientific foundation for the collection, conservation, evaluation, and disease-resistant breeding of water bamboo resources.

Key words: Zizania latifolia, Ustilago esculenta, germplasm resource, maturity, disease resistance

CLC Number: