Crops ›› 2019, Vol. 35 ›› Issue (4): 37-41.doi: 10.16035/j.issn.1001-7283.2019.04.006

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Multiple Analysis of Ear Characters and Grain Water Content in Maize Harvest Period in Middle-Late-Maturing Regions of Shanxi Province

Guo Hongliang,Liu Yongzhong,Chang Haixia,Jin Kunpeng,Li Wanxing,Cao Jinjun,Li Dan,Li Xiaoxia   

  1. Millet Research Institute, Shanxi Academy of Agricultural Sciences, Changzhi 046001, Shanxi, China
  • Received:2019-01-08 Revised:2019-04-03 Online:2019-08-15 Published:2019-08-06
  • Contact: Yongzhong Liu

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Abstract:

In this paper, correlations and path analysis had been done between main ear characters and grain moisture in 20 maize varieties, which have large area popularization and basically the same maturity stages growing at the middle-late- maturing regions of Shanxi province. Correlation analysis showed that grain water content in harvest stage had a significant positive correlation with ear diameter, axis diameter, grain thickness, area of bracts moisture content of bracts, and had a positive correlation with kernel width, but a significant negative correlation with kernels per row. Path analysis showed that main ear characters had direct effects on grain water content in harvest stage, it followed the order of ear rows>ear diameter>moisture content of bracts=grain thickness>axis diameter>kernels per row>kernel width>ear length>area of bracts. Therefore in order to breed a new species with lower moisture content of kernels at harvest stage, we should emphasize on genotypes which have smaller area of bracts, lower moisture content of bracts, slighter ear width and axis diameter, thinner grain thickness, narrower kernel width, and more kernels per row.

Key words: Maize, Harvest stage, Moisture content of kernels, Multiple analysis

Table 1

Comparisons of grain moisture content and related characters of different maize varieties at harvest stage"

性状Trait 极小值Min 极大值Max 均值Mean 变异系数Coefficient of variation (%)
穗行数(X1) Ear rows 14.82 18.26 16.30±0.67 4.11
行粒数(X2) Kernels per row 34.92 42.25 38.13±2.21 5.76
穗长(X3) Ear length (cm) 18.13 21.37 19.79±0.76 3.83
穗粗(X4) Ear diameter (cm) 4.77 5.25 4.94±0.14 2.87
轴粗(X5) Axis diameter (cm) 2.47 2.94 2.64±0.16 5.97
粒宽(X6) Kernel width (cm) 0.81 0.94 0.88±0.03 3.63
粒厚(X7) Grain thickness (cm) 0.37 0.44 0.41±0.02 4.32
粒长(X8) Kernel length (cm) 1.02 1.22 1.09±0.04 4.13
苞叶总面积(X9) Area of bracts (cm2) 191.33 288.24 230.57±28.24 12.25
苞叶含水率(X10) Moisture content of bracts (%) 30.97 41.86 35.54±3.07 8.65
子粒含水率(X11) Moisture content of kernels (%) 21.14 28.13 25.11±1.80 7.36

Table 2

Correlation analysis between grain moisture content of maize and 10 correlative characters at harvest stage"

性状Trait X1 X2 X3 X4 X5 X6 X7 X8 X9 X10
X2 -0.217
X3 -0.337 -0.547*
X4 -0.300 -0.460* -0.059
X5 -0.529* -0.565** -0.304 0.786**
X6 -0.343 -0.665** -0.318 0.377 0.293
X7 -0.212 -0.777** -0.083 0.816** 0.688** 0.552*
X8 -0.228 -0.138 -0.124 0.031 0.152 0.238 0.040
X9 -0.270 -0.699** -0.227 0.695** 0.672** 0.429 0.798** 0.168
X10 -0.344 -0.663** -0.150 0.727** 0.821** 0.334 0.786** 0.171 0.859**
X11 -0.142 -0.780** -0.178 0.837** 0.778** 0.503* 0.922** 0.080 0.828** 0.857**

Table 3

Path coefficient of agronomic characters to grain moisture content at harvest stage"

通径Path
Xi→Y		 直接作用
Direct effect		 间接作用Indirect effect
总和Total →X1 →X2 →X3 →X4 →X5 →X6 →X7 →X9 →X10
X1 -0.2733 0.4153 0.0267 0.0201 0.0787 0.1081 0.0361 0.0539 0.0044 0.0873
X2 -0.1234 -0.6563 0.0592 -0.0327 -0.1207 -0.1153 -0.0700 -0.1971 -0.0115 -0.1682
X3 -0.0597 -0.1182 0.0921 -0.0675 0.0154 -0.0620 -0.0335 -0.0210 -0.0037 -0.0380
X4 0.2624 0.5745 -0.0820 0.0568 -0.0035 0.1604 0.0397 0.2072 0.0114 0.1845
X5 0.2041 0.5742 -0.1447 0.0697 0.01810 0.2062 0.0309 0.1747 0.0110 0.2083
X6 0.1053 0.3980 -0.0937 0.0820 0.0190 0.0990 0.0599 0.1400 0.0070 0.0848
X7 0.2538 0.6680 -0.0580 0.0958 0.0049 0.2142 0.1405 0.0581 0.0131 0.1994
X9 0.0164 0.8113 -0.0737 0.0862 0.0136 0.1823 0.1372 0.0452 0.2026 0.2179
X10 0.2538 0.6038 -0.0940 0.0818 0.0089 0.1908 0.1676 0.0352 0.1994 0.0141
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