泡桐种源抗丛枝病性状的遗传变异  

Genetic Variation of Paulownia Provenances Resistance against Paulownia witches' Broom

作　　者：茹广欣[1] 朱秀红[1] 李荣幸[1] 王豁然[2] 刘宁[1] 周海江[3] 

机构地区：[1]河南农业大学林学园艺学院,河南郑州450002 [2]中国林业科学研究院林业研究所,北京100091 [3]国家林业局泡桐研究开发中心,河南郑州450003

出　　处：《林业科学研究》2005年第6期669-675,共7页Forest Research

基　　金：河南省林业厅项目办"泡桐工业用材优良品种的选育与改良";编号:00300812

摘　　要：泡桐丛枝病是影响泡桐生长的一种主要病害,种源试验表明在毛泡桐种源中,除甘肃平凉未见发病以外,其它 种源均有病害发生。江苏南京、湖北十堰、黄冈、陕西商县和辽宁大连5个种源发病较重,病情指数超过30％;白花 泡桐丛枝病发病率较低,自然分布区南部的种源很少见到丛枝病发生,分布区北部与毛泡桐分布区有重叠的种源, 丛枝病发病相对较重。毛泡桐起源靠西的种源发病较轻,随着经度的增加,丛枝病发病有增大趋势;白花泡桐发病 与种源经度无关,而与纬度相关明显,呈现出纬度越高,发病率越低,病情指数越小的趋势。泡桐品种间丛枝病发病 率和病情指数差异明显,通过品种选择可以获得抗病优良品种。Paulownia witches＇ Broom is one of the most severe diseases affecting the growth of Paulownia trees. In P. tomentosa, the MLO occurs in all provenances except for those in Pingliang （Gansu）, even heavily in Nanjing （Jiangsu）, Shiyan and Huanggang （Hubei）, Shang county （Shanxi） and Dalian （Liaoning）, where disease index was over 30%. In P. fortuneii, the incidence of diseases was low, and MOL didn＇ t occur in the southern provenances but was heavy in the north where distribution of P. fortuneii and P. tomentosa overlap. Provenance trails showed that MOL was generally severe in P. tomentosa, the severity tended to increase with the longitude of provenance origins from the western provenances to eastern provenances. Contrastingly, the MLO incidence in P. fortuneii was independent from the longitude of provenance origins, but significantly correlated with the latitude. The higher the latitude of provenance origin, the lower the incidence of diseases was and the smaller the infection index was. There were also significant differences in incidence of diseases and infection index among different Paulownia clones, so it is feasible to select clones with high resistance to the Paulownia witches＇ Broom.

关 键 词：泡桐 丛枝病 种源 地理变异 

分 类 号：S792.43[农业科学—林木遗传育种]