Crops ›› 2019, Vol. 35 ›› Issue (5): 37-40.doi: 10.16035/j.issn.1001-7283.2019.05.006

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Genetic Analysis of the Kernel Length of Maize with Mixed Model of Major Gene Plus Polygene

Zhang Zhongwei,Yang Hailong,Fu Jun,Xie Wenjin,Feng Guang   

  1. Dandong Academy of Agricultural Sciences, Fengcheng 118109, Liaoning, China
  • Received:2019-02-11 Revised:2019-06-10 Online:2019-10-15 Published:2019-11-07
  • Contact: Guang Feng

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Abstract:

The kernel length of maize is the important trait for superior variety selection. P1, F1, P2, B1, B2 and F2 generations of different kernel length maize inbred lines Tie 7922 and E28 were used to research on the inheritance of maize kernel length with major gene-ploygene mixed inheritance analysis. The results showed that: the kernel length represented transgressive heterosis in F1, the inheritance of maize kernel length trait fitted the model of two pair of additive-dominance-epitasis major gene plus additive- dominance-epitasis polygene about E-1-0 Model; the major gene heritability was between 41.22%-80.58%; the polygene heritability was between 17.68%-24.95%, the environmental factors of the phenotypic variation was between 19.42%-41.10%. The effects of major gene were more important than the effects of polygene to maize kernel length inheritance, and the accumulation of major genes of additive was significant, so the kernel length was selected by accumulated of generations.

Key words: Maize (Zea mays L.), Kernel length, Major gene+polygene, Genetic

Table 1

The range of kernel length for 16 grades"

分级
Grade		 分离世代粒长(cm)
The kernel length of segregating generation
B1 B2 F2
1 0.905~0.955 0.829~0.871 0.858~0.902
2 0.955~1.005 0.871~0.913 0.902~0.946
3 1.005~1.055 0.913~0.955 0.946~0.990
4 1.055~1.105 0.955~0.997 0.990~1.034
5 1.105~1.155 0.997~1.039 1.034~1.078
6 1.155~1.205 1.039~1.081 1.078~1.122
7 1.205~1.255 1.081~1.123 1.122~1.166
8 1.255~1.305 1.123~1.165 1.166~1.210
9 1.305~1.355 1.165~1.207 1.210~1.254
10 1.355~1.405 1.207~1.249 1.254~1.298
11 1.405~1.455 1.249~1.291 1.298~1.342
12 1.455~1.505 1.291~1.333 1.342~1.386
13 1.505~1.555 1.333~1.375 1.386~1.430
14 1.555~1.605 1.375~1.417 1.430~1.474
15 1.605~1.655 1.417~1.459 1.474~1.518
16 1.655~1.705 1.459~1.501 1.518~1.562

Fig.1

The frequency distribution of kernellength grade in segregating generation of Tie7922×E28"

Table 2

The AIC value for kernel length of six generations of 24 genetic models"

模型
Model		 AIC值
AIC value		 模型
Model		 AIC值
AIC value		 模型
Model		 AIC值
AICvalue
A-1 -665.57 B-1-5 -798.31 D-4 -1021.08
A-2 -637.62 B-1-6 -800.31 E-1-0 -1218.29
A-3 -665.78 C-0 -1173.82 E-1-1 -1192.33
A-4 -460.48 C-1 -1051.80 E-1-2 -1043.33
B-1-1 -1226.44 D-0 -1169.82 E-1-3 -1119.19
B-1-2 -823.00 D-1 -1016.32 E-1-4 -1044.74
B-1-3 -583.27 D-2 -1018.31 E-1-5 -1047.33
B-1-4 -668.10 D-3 -1017.89 E-1-6 -

Table 3

The applicability test of alternative genetic models for kernel length"

模型Model 群体Population U12 U22 U32 nW2 Dn
B-1-1 P1 8.182(0.004)* 7.129(0.008)* 0.159(0.690) 0.889(<0.05)* 0.379(<0.05)*
F1 4.795(0.029)* 8.118(0.004)* 8.502(0.004)* 0.594(<0.05)* 0.325(<0.05)*
P2 0.011(0.915) 0.759(0.384) 9.423(0.002)* 0.296(>0.05) 0.230(>0.05)
B1 36.913(0.000)* 24.047(0.000)* 15.334(0.000)* 4.214(<0.05)* 0.206(<0.05)*
B2 33.711(0.000)* 15.517(0.000)* 45.296(0.000)* 4.713(<0.05)* 0.253(<0.05)*
F2 0.012(0.912) 0.576(0.448) 6.805(0.009)* 0.254(>0.05) 0.073(>0.05)
E-1-0 P1 0.029(0.864) 0.116(0.734) 0.485(0.486) 0.064(>0.05) 0.145(>0.05)
F1 0.054(0.816) 0.475(0.491) 13.369(0.000)* 0.264(>0.05) 0.219(>0.05)
P2 0.011(0.918) 0.580(0.447) 7.002(0.008)* 0.220(>0.05) 0.203(>0.05)
B1 2.849(0.091) 0.892(0.345) 7.611(0.006)* 0.635(<0.05)* 0.107(<0.05)*
B2 0.100(0.752) 0.275(0.600) 0.765(0.382) 0.078(>0.05) 0.052(>0.05)
F2 0.016(0.900) 0.016(0.901) 0.000(0.990) 0.027(>0.05) 0.034(>0.05)

Table 4

Estimated values about genetic parameters of kernel length"

一阶参数
First order
parameter		 估计值
Estimated
value		 二阶参数
Second order
parameter		 估计值
Estimated value
B1 B2 F2
m1 0.81 σp2 0.01 0.02 0.02
m2 1.35 σmg2 0.00 0.01 0.02
m3 0.72 σpg2 0.00 0.01 0.00
m4 1.19 σ2 0.00 0.00 0.00
m5 1.26 h2mg (%) 41.22 51.49 80.58
m6 1.12 h2pg (%) 17.68 24.95 0.00
da 0.12
db 0.06
ha 0.02
hb 0.02
i 0.02
jab 0.05
jba 0.12
l -0.02
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