橡胶树不同品种(系)抗寒性的室内鉴定

目的]筛选抗寒性较强的橡胶品种,为橡胶的生产及抗寒育种提供理论依据。方法]以93-114作为对照,通过室内鉴定法,用人工气候箱模拟辐射寒害,对国家橡胶种质资源圃的31个品种(系)橡胶芽条进行了抗寒性的室内鉴定。结果]31个品种(系)中,抗寒性强的品种(系)有3个,占9.68%;抗寒性较强的品种有13个,占41.94%;抗寒性中等的品种有4个,占12.90%;抗寒性较弱的品种有6个,占19.35%;抗寒性弱的品种有5个,占16.13%。结论]热研7-18-55、93-114、热研2-14-39芽条抗寒性最强,徐育3I、AN873、针选1(4)、五星I3、热研4、保亭3412、红山67-15、湛试496-1、闽林71-22、云研77-2、文昌7-35-11、南牛田1-1、热研88-13芽条抗寒性较强,BPM24、IAN2887、RRIC52、热研7-20-59、针选5芽条抗寒性最弱。

Laboratory Identification on the Cold Resistance of Hevea brasiliensis in Different Various Lines

Objective] The study aimed to screen Hevea brasiliensis varieties with strong cold resistance and provided the theoretical basis for production and cold resistance breeding.Method] With 93-114 as the CK,the bud sticks of 31 varieties(lines) of H.brasiliensis that belong to State Rubber Germplasm Resources Nursery were made for laboratory identification of the cold resistance.Result] Among 31 varieties(lines),3 varieties(lines) with strong cold resistance,being 9.68% of the total;13 varieties with stronger cold-resistance, being 41.94% of the total;4 varieties with middle cold-resistance,being 12.90% of the total;6 varieties with weaker cold-resistance,being 19.35% of the total;5 varieties with weak cold resistance,being 16.13% of the total.Conclusion] The cold resistance in the bud sticks of Reyan 7-18-55,93-114,Reyan 2-14-39 was the strongest,and that of Xuyu 3,IAN873,Zhenxuan 1(4),Wuxing I3,Reyan 4,Baoting 3412,Hongshan 67-15,Zhanshi 496-1,Minlin 71-22,Yunyan 772,Wenchang 7-35-11,Nanniutian 1-1,Reyan 88-13 was the stronger,but that of BPM24,IAN 2887,RRIC 52,Reyan 7-20-59,Zhenxuan 5 was weakest.