Diversity of resistance to bacterial blight and geographical distribution of 29 populations of wild rice [Oryza meyeriana(Zoll. & Moritzi) Baill.] in Yunnan, China
Diversity of resistance to bacterial blight and geographical distribution of 29 populations of wild rice [Oryza meyeriana(Zoll. & Moritzi) Baill.] in Yunnan, China
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29个野生稻群体的白叶枯病抗性多样性及地理分布[Oryza meyeriana(Zoll.
DOI：
10.1007/s10722-020-01001-7
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发表时间：
2021
影响因子：
2
通讯作者：
Dai Luyuan
中科院分区：
文献类型：
--
作者：
Xinxiang A.;Qin Falan;Tang Cuifeng;Zhang Feifei;Dong Chao;Yang Yayun;Zhang Duanpin;Dai Luyuan
疣粒野生稻（Oryza meyeriana（Zoll. & Moritzi）贝尔。是栽培稻的野生近缘种。据报道，meyerianais对细菌性枯萎病（BB）表现出高抗性或免疫力，所述细菌性枯萎病是由黄单胞菌属细菌致病型引起的疾病。稻属（Xoo）。为了充分了解ofO的BB抵抗力。meyeriana29O.用从云南水稻上分离的Xoo强毒株CX 28 -3，通过人工剪叶接种MeyerianaL.然后分析了每个加入的抗性和生境的多样性。结果表明，抗性是可变的。在87份材料中，只有20.7%的材料是抗病的（12个抗病和6个高抗），37.9%的材料是感病的（9个高感和24个感病），其余41.4%的材料是中抗的（36份材料），没有一份材料对CX 28 -3表现出免疫。种群间的抗性变异大于种群内的抗性变异。29个种群的O.根据行政区域、水系、经度、纬度、海拔高度和气候因素，将梅耶拉划分为不同的类别。29O. Meyerianapopulations. O的阻力。五个行政区之间的梅耶里亚纳加入情况差异很大。西双版纳的抵抗力最强，其次是普洱、德宏和临沧，保山的抵抗力最弱。抗性多样性指数以普洱最高（1.13），其次为德宏（0.95）、保山（0.69）、临沧（0.67）和西双版纳（0.64）。相关分析表明，地理和气候因素对稻曲病菌的抗性有影响。印度楝纬度与病情指数呈极显著正相关。海拔高度与病情指数也呈显著正相关。这些结果表明，O.纬度或海拔较高的meyerianaat更容易受到BB。通过聚类分析，对该地区的地理气候因子进行了分析。29个居群可分为5个抗性差异较大的类群。meyerianais对BB几乎免疫，但感病材料在云南省尚属首次。
Oryza meyeriana(Zoll. & Moritzi) Baill. is a wild relative of cultivated rice.O. meyerianais reported to exhibit high resistance or immunity to bacterial blight (BB), a disease caused byXanthomonas oryzae pv. Oryzae(Xoo). To fully understand the BB resistance ofO. meyerianaacross multiple distribution sites in Yunnan, China, 87 accessions of 29O. meyerianapopulations were inoculated by artificial leaf cutting with theXoovirulent strain CX28-3 isolated from rice in Yunnan. The diversity of resistance and habitat of each accession were then analysed. The results showed that resistance was variable. Among the 87 accessions, only 20.7% were resistant (12 resistant and 6 highly resistant), 37.9% were susceptible (9 highly susceptible and 24 susceptible), and the remaining 41.4% (36 accessions) were moderately resistant; no accession tested displayed immunity to CX28-3. The variation of resistance among populations is higher than within a population. The 29 populations ofO. meyerianawere divided into categories according to administrative region, river system, longitude, latitude, altitude and climate factors. The resistance distribution and diversity index of the 29O. meyerianapopulations were calculated. The resistance ofO. meyerianaaccessions was shown to be quite different among the five administrative regions. The resistance from Xishuangbanna was the strongest, followed by Pu’er, Dehong, and Lincang, while that from Baoshan was the weakest. The diversity index of resistance is highest in Pu’er (1.13), followed by Dehong (0.95), Baoshan (0.69), Lincang (0.67), and Xishuangbanna (0.64). Correlation analysis showed that geographical and climatic factors impacted the resistance ofO. meyeriana. There is a highly significant positive correlation between latitude and disease index. There is also a significant positive correlation between altitude and disease index. These results indicate that accessions ofO. meyerianaat greater latitude or altitude are more susceptible to BB. By cluster analysis of the geographical and climatic factors of theO. meyerianadistribution sites, the 29 populations were classified into five groups with differences in resistance.O. meyerianais considered nearly immune to BB, but susceptible accessions were found for the first time in Yunnan Province, China.