Crops ›› 2017, Vol. 33 ›› Issue (2): 23-28.doi: 10.16035/j.issn.1001-7283.2017.02.004

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Combining Ability and Genetic Parameters of Ear Characters of Ten Maize Inbred Lines

Lu Bingsheng,Gao Hongmin,Yao Yongxiang,Bai Xiangli,Chen Zengqi   

  1. Dandong Academy of Agricultural Sciences,Fengcheng 118109,Liaoning,China
  • Received:2017-01-03 Revised:2017-02-08 Online:2017-04-15 Published:2018-08-26
  • Contact: Hongmin Gao

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Abstract:

Seven new female maize inbred lines were tested with the design of P1×P2 incomplete diallel crossing of NCⅡ method to study on combining ability and genetic parameters of ear characters. The results showed that the lines of K6, X69, X18 and XLL had higher common combining ability, which could be used directly. The combinations of XLL×K6 and X69×K6 with stronger heterosis had potential in increasing yield. Based on the analysis of genetic parameters, ear length, ear rows, row grains, 100-kernel weight, and percentage of kernel weight in ear weight should be selected earlier, and yield, ear diameter and bald should be selected earlier or later according to situation.

Key words: Maize, Inbred lines, Ear characters, Combining ability, Heritability

Table 1

The variance analysis of 8 traits (F value)"

变异来源
Source of variation		 自由度
df		 穗长
Ear length		 秃尖长
Bar tip length		 穗粗
Ear diameter		 穗行数
Kernel row
number per ear		 行粒数
Kernel number
per row		 百粒重
100-kernel
weight		 出子率(%)
Grain index		 小区产量
Plot yield
区组间 2 2.8199 0.9738 2.6276 10.8195** 0.4393 0.3083 3.8708* 1.7029
组合间 20 506.8630** 27.0787** 8.4499** 482.4875** 2 045.5656** 1 011.6921** 130.9094** 69.7105**
P1 6 1.7102 1.2441 1.1539 8.4325** 1.9048 2.9180 11.5960** 1.2881
P2 2 8.0369** 1.1242 4.6269* 12.9189** 6.4009* 6.3564* 5.6695* 14.7801**
P1×P2 12 264.4402** 24.9424** 5.9977** 109.1197** 1 129.1958** 479.2367** 28.1783** 28.2864**
误差 40

Table 2

The relative effect value of general combining ability of 8 traits of 10 inbred lines"

自交系
Inbred line		 穗长
Ear length		 秃尖长
Bar tip length		 穗粗
Ear diameter		 穗行数
Kernel row number per ear		 行粒数
Kernel number per row		 百粒重
100-kernel weight		 出子率
Grain index		 小区产量
Plot yield
CA6 15.287 -22.956 -3.448 -16.528 15.550 12.957 -5.093 -19.819
DKM -5.893 51.887 -2.178 0.153 -8.500 -7.846 2.576 0.028
6ML -4.590 -27.359 -1.119 3.953 -4.428 -8.771 -3.339 -3.487
X18 3.035 91.509 -0.907 11.541 -3.603 -0.024 3.207 7.797
X69 -1.592 -40.566 0.998 1.304 2.501 -0.829 1.579 14.120
X96 -7.914 -33.962 3.751 3.959 -6.466 1.522 0.482 -5.189
XLL 1.667 -18.554 2.904 -4.381 4.946 2.991 0.588 6.550
D59 -9.980 -31.132 -1.633 1.793 -6.726 -7.796 -0.731 -19.778
K6 11.945 -0.943 -2.359 -7.808 11.529 1.909 1.627 27.466
S12 -1.964 32.076 3.993 6.015 -4.803 5.886 -0.897 -7.688

Table 3

The relative effect value of special combining ability of 8 traits of 21 combinations"

组合
Combination		 穗长
Ear length		 秃尖长
Bar tip length		 穗粗
Ear diameter		 穗行数
Kernel row number per ear		 行粒数
Kernel number per row		 百粒重
100-kernel weight		 出子率
Grain index		 小区产量
Plot yield
CA6×D59 -6.769 -45.912 0.363 1.255 -0.604 -5.160 0.223 -17.024
DKM×D59 7.960 -1.887 5.445 2.766 -0.407 10.896 -0.297 12.378
6ML×D59 2.747 83.962 -5.777 -5.587 1.625 -4.591 1.197 1.349
X18×D59 -2.141 -21.698 3.539 5.036 -8.972 1.063 -2.397 5.885
X69×D59 -5.139 -28.302 -2.178 -2.938 0.208 0.082 1.757 3.305
X96×D59 1.182 -34.906 -1.119 1.255 6.118 -2.122 0.210 6.452
XLL×D59 2.160 48.742 -0.272 -1.787 2.032 -0.167 -0.692 -12.346
CA6×K6 17.643 122.013 -1.452 -2.821 10.477 5.255 -1.495 20.365
DKM×K6 -2.821 -12.264 -5.898 -8.120 5.182 -3.989 1.601 -14.622
6ML×K6 -14.682 -71.698 4.477 8.567 -11.729 -0.709 -0.862 -20.207
X18×K6 -4.711 -32.076 -1.452 0.979 -2.763 -11.516 0.822 -17.968
X69×K6 7.541 -58.491 6.171 3.249 8.853 -0.294 -1.524 8.968
X96×K6 -7.839 -12.264 -2.299 -2.821 -15.204 8.126 1.272 1.738
XLL×K6 4.869 64.780 0.454 0.967 5.185 3.127 0.185 21.726
CA6×S12 -10.874 -76.101 1.089 1.566 -9.873 -0.095 1.271 -3.342
DKM×S12 -5.139 14.151 0.454 5.354 -4.775 -6.907 -1.304 2.244
6ML×S12 11.936 -12.264 1.301 -2.980 10.105 5.300 -0.335 18.859
X18×S12 6.852 53.774 -2.087 -6.015 11.735 10.454 1.575 12.082
X69×S12 -2.402 86.793 -3.993 -0.312 -9.061 0.212 -0.234 -12.273
X96×S12 6.657 47.170 3.418 1.566 9.086 -6.004 -1.482 -8.190
XLL×S12 -7.029 -113.522 -0.182 0.820 -7.217 -2.960 0.507 -9.381

Table 4

The rank of general combining ability effect, effect value of special combining ability and yield"

组合
Combination		 Duncan's多重比较的显著水平
Significance level of Duncan's multiple comparisons		 一般配合力
General combining ability		 特殊配合力
Special combining ability		 总配合力
Total combining ability
小区产量
Plot yield (kg)		 5%
 1%
 排名
Rank		 母本
Female		 父本
Male		 效应值
Effect value		 排名
Rank		 效应值
Effect value		 排名
rank
XLL×K6 6.10 a A 1 6.55 27.47 21.73 1 55.74 1
X69×K6 5.90 a A 2 14.12 27.47 8.97 6 50.55 2
CA6×K6 5.02 b B 3 -19.82 27.47 20.37 2 28.01 3
X96×K6 4.86 bc BC 4 -5.19 27.47 1.74 11 24.01 4
X18×K6 4.60 cd BCD 5 7.80 27.47 -17.97 20 17.30 5
DKM×K6 4.42 de CDE 6 0.03 27.47 -14.62 18 12.87 6
X18×S12 4.40 de CDE 7 7.80 -7.69 12.08 5 12.19 7
6ML×S12 4.22 de DEF 8 -3.49 -7.69 18.86 3 7.68 8
6ML×K6 4.07 ef EFG 9 -3.49 27.47 -20.21 21 3.77 9
X69×D59 3.83 fg FGH 10 14.12 -19.78 3.31 9 -2.35 10
DKM×S12 3.71 fg FGHI 11 0.03 -7.69 2.24 10 -5.42 11
X69×S12 3.69 fg GHI 12 14.12 -7.69 -12.27 16 -5.84 12
X18×D59 3.68 fg GHI 13 7.80 -19.78 5.89 8 -6.10 13
DKM×D59 3.63 g GHI 14 0.03 -19.78 12.38 4 -7.37 14
XLL×S12 3.51 gh HIJ 15 6.55 -7.69 -9.38 15 -10.52 15
X96×D59 3.19 hi IJK 16 -5.19 -19.78 6.45 7 -18.51 16
X96×S12 3.09 ij JK 17 -5.19 -7.69 -8.19 14 -21.07 17
6ML×D59 3.06 ij JK 18 -3.49 -19.78 1.35 12 -21.92 18
XLL×D59 2.92 ij K 19 6.55 -19.78 -12.35 17 -25.57 19
CA6×S12 2.71 j K 20 -19.82 -7.69 -3.34 13 -30.85 20
CA6×D59 1.70 k L 21 -19.82 -19.78 -17.02 19 -56.62 21

Table 5

The genetic parameters of 8 traits"

遗传参数
Genetic parameter		 穗长
Ear length		 秃尖长
Bar tip length		 穗粗
Ear diameter		 穗行数
Kernel row
number per ear		 行粒数
Kernel number
per row		 百粒重
100-kernel
weight		 出子率
Grain index		 小区产量
Plot yield
σ2P1 0.738 0.013 0.003 2.080 3.551 4.027 5.743 0.042
σ2P2 3.132 0.003 0.026 1.430 9.085 4.819 1.085 0.862
σ2P1×P2 3.104 0.152 0.042 0.832 11.765 6.285 1.568 0.423
Ve 0.035 0.019 0.025 0.023 0.031 0.039 0.173 0.047
Vg(%) 55.49 9.36 40.60 80.84 51.79 58.46 81.32 68.16
Vs(%) 44.51 90.64 59.40 19.16 48.21 41.54 18.68 31.84
hb2(%) 99.50 89.80 73.71 99.47 99.87 99.74 97.98 96.62
hn2(%) 55.21 8.40 29.92 80.41 51.72 58.31 79.68 65.85
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