塔里木沙拐枣果实性状的种内变异研究

以塔里木沙拐枣(Calligonum roborovskii A.Los.)果实形态特征为研究对象,应用方差分析法,对同一居群单株内与单株间果实形态性状变异情况及果实性状间的相关性进行了分析研究。结果显示,果实形状、果实长度、果实宽度、刺毛长度、两肋间距、两刺间距、瘦果形状、瘦果长度、瘦果宽度等9个果实性状指标在单株内与单株间都有变异,但单株间果实变异比单株内果实变异大,而每果肋数与每条肋刺行数2个指标不论单株内还是单株间都保持稳定,说明每果肋数与每条肋刺行数2个指标是沙拐枣属植物分类的重要特征指标;代表果实和瘦果大小指标的相关关系都达到极显著,说明果实和瘦果的生长发育都保持一定的一致性,大的果实一般瘦果也大。

Variability of Fruit Characters of Calligonum roborovskii A.Los.

Calligonum L.is an endemic and dominant plant in the desert areas of the central Asia.Which characters of drought-resistance,salt resistance and sand-loving,it is a good species for wind-break and sand-fix.The variability of characters of fruit is rich.The fruit morphological variations and the relativity between different indexes of fruit morphology among seven natural individuals of Calligonum roborovskii A.Los.from Bugur county of Xinjiang were investigated in the present paper.The statistically analyzing result is indicated that there are significant difference between and within the seven natural individuals among the 9 of the 11 morphological traits which are the variability of shape of fruit,length of fruit,diameter of fruit,the bristle length of fruit,the distance of between bristles,the distance of the between ribs,shape of achenes,length of achenes,diameter of achenes.but the difference within plants are lesser than the between the plants.The relativity among the indexes indicating fruit and core size are evident(P<0.01).