糯玉米杂交种产量及主要农艺性状相关分析

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

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。

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 posi- tion〉ear diameter〉ear length〉bald head length.