糯玉米杂交种产量及主要农艺性状相关分析

试验选用自育的20个糯玉米杂交种为供试材料,采用随机区组设计。通过对鲜穗采收期和成熟期产量、穗长、穗粗、穗行数、行粒数、株高、穗位高等性状进行相关和通径分析。结果表明,在鲜穗采收期,穗长、双穗率、百粒重、出籽率等性状均与鲜穗产量呈正相关,作用最大的因素是穗长(r=0.600 0**)。通径分析显示各性状对鲜穗产量作用大小顺序为双穗率>穗长>百粒重>出籽率>穗位高>行粒数>穗粗>株高。在完熟期,行粒数(r=0.504 2*)、穗粗(r=0.495 9*)与干子粒产量呈正相关,达显著水平,进一步通径分析表明,各性状对干子粒产量作用排序为行粒数>穗位高>穗粗>穗长>秃尖长。

Analysis on Correlation Between Yield and the Main Agronomic Characteristics of Waxy Maize Hybrids

To determine the correlation between yield and the main agronomic characteristics of waxy maize hybrids,using a randomized complete block design tested twenty hybrids.The results showed that the most contribution to the fresh-eatable spike yield is from ear length(r=0.600 0**),further path analysis showed an order about the important of agronomic characteristics to the fresh-eatable spike yield from large to small: double ear percentage>ear length>100-grain weight>shelling percentage>ear position>kernels in ear row>ear diameter>plant height.While kernels in ear row(r=0.504 2*) and ear diameter(r=0.495 9*) are the main contribution to the dry yield,path analysis show that the important of agronomic characteristics to dry yield from large to small: kernels in ear row>ear position>ear diameter>ear length>bald head length.