|作者： 杨荣仲1 2 周会1 2 谭芳1 周忠凤1 宋修鹏1 唐仕云1 黄海荣1 邓宇驰1|
|单位： （1广西农业科学院甘蔗研究所/农业部广西甘蔗生物技术与遗传改良重点实验室/广西甘蔗遗传改良重点实验室/中国农业科学院 甘蔗研究中心 南宁530007；2广西蔗糖产业协同创新中心 南宁530004）|
|关键词： 甘蔗 抗病性 梢腐病 叶片病害|
|出版年,卷(期):页码：2017 ,48 ( 10 )： 页码：1810-1816|
【Objective】The present study aimed to understand the characteristics of disease resistance of sugarcane
parents and hybrid combinations，and to provide reference and guidance for the selection of parents and hybrid progeny.
【Method】The main agronomic traits and disease data of pokkahboeng，smut，leaf disease of plant seedlings，and pokkahboengdata of ratoon sugarcane were investigated from 146 sugarcane families in 2015. Correlation analysis，variance and combining ability analysis were processed.【Result】Disease of plant seedlings mainly occurred on leaf，including red rot，ring spot，brown streak，purple spot and yellow spot diseases. Incidence of pokkahboeng in ratoon sugarcane was significantly higher than that in new planting sugarcane. Correlation analysis showed that smut disease affected sugarcane yield in planting seedlings. There was extremely significant negative correlation between incidence of pokkahboeng and leaf disease（P<0.01，the same below）. There was extremely significant difference in incidence of pokkahboeng，incidence of leaf disease and leaf disease among families. The traits contained low broad sense heritability. Both additive and non-additive effects were present in the incidence of pokkahboeng，but only additive effect were found in incidence of leaf disease and leaf disease selectable rate. In top 20 parents，leaf disease index had the highest breeding value，followed by pokkahboeng index，and leaf disease selectable rate had low breeding value. Evaluated by cross effects，families with good resistance to pokkahboeng，leaf disease and high leaf disease selectable rate were 87，74 and 50 respectively.【Conclusion】Resistance to smut and pokkahboeng should not be evaluated by new plant seedling. Incidence or index of pokkahboeng can be selec-ted according to the environmental variation when evaluating the resistance of ratoon sugarcane to pokkahboeng.