作　　者： ; (陈建平）; (等）;

机构地区： 华南农业大学农学系

出　　处： 《华南农业大学学报》 2001年第1期5-8,共4页

摘　　要： 选取 8个甘蔗基因型进行苗期叶片形态、解剖性状与蔗茎产量和蔗汁糖分关系的研究 .结果表明 ,苗期叶宽与叶长、叶脉数之间分别呈显著正相关 (0 .6 1、0 .72 ) ,叶脉数与平均叶脉间宽度 (AVW)呈显著负相关 (- 0 .85 ) .上述前 3个性状与蔗汁糖分呈负相关 ,AVW与蔗汁糖分呈正相关 ,而蔗茎产量与叶宽、叶脉数呈负相关 ,与叶长、AVW呈正相关关系 .通径分析结果表明 ,叶长对蔗汁糖分的直接贡献为 - 0 .5 5 94,对蔗茎产量为 0 .5 771;叶宽对蔗汁糖分的直接贡献为 0 .475 1,对蔗茎产量为 - 0 .2 475 ;而叶脉数对蔗汁糖分和蔗茎产量均为负向作用 .研究结果认为 ,甘蔗苗期表现出叶片较窄 ,叶脉数较少 ,可作为苗期进行高产高糖性状间接选择的指标 . The morphological and anatomical characters of leaf at seedling stage of 8 sugarcane genotypes were studied. The results showed that the correlation coefficients (0.61 and 0.72) among leaf width, leaf length and vein's number were positive in very significant level. There was an extremely significant negative correlation coefficient (-0.85) between leaf width and average vein width (AVW). The correlation among the first three characters mentioned above and cane juice sugar was negative. The cane yield was negatively correlated with leaf width and vein number and positively correlated with leaf length and AVW, respectively. The path analysis showed that the leaf length directly contributed 0 559 4 value to the cane juice sugar and 0.577 1 value to the cane yield, and the leaf width directly contributed 0.475 1 value to the cane juice sugar and -0.247 5 value to the cane yield. The vein's number had negative contributions to the both cane yield and juice sugar. The results showed that the characters of seedlings, which were more narrow leaf, lower vein's number, can be used as indirect selection indices for higher yield and higher sugar content of cane.

关 键 词： 甘蔗 苗期 叶片形态解剖性状 糖分 产量 基因型

领　　域： [农业科学]