Crops ›› 2020, Vol. 36 ›› Issue (5): 88-92.doi: 10.16035/j.issn.1001-7283.2020.05.013

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Genetic Analysis of Super Multiple Ear Row Number in DH Line 15D969 of Maize

Li Zhongnan1(), Wang Yueren2, Zhang Yanhui2, Wu Shenghui2, Qu Haitao2, Xu Zhengxue2, Li Guangfa2()   

  1. 1Jilin Agricultural Technology Extension Station, Changchun 130033, Jilin, China
    2Tonghua Academy of Agricultural Sciences of Jilin Province, Meihekou 135007, Jilin, China
  • Received:2020-02-23 Revised:2020-03-16 Online:2020-10-15 Published:2020-10-12
  • Contact: Li Guangfa E-mail:18741379479@163.com;lgftn666@sina.com

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Abstract:

Two six-generation population of P1, P2, F1, B1, B2 and F2 were established using super multiple ear row number DH line 15D969 and low ear row number inbred lines of PH6WC and X901m were used as materials to analyze the inheritance of ear row number with major gene-polygene mixed inheritance model. The results showed that the average heterosis of F1 was -1.11%, which was a mixture model of two major genes additive-dominance-epitasis plus polygene additive-dominance. The heritability of major genes was 12.22%-96.37%, and the heritability of polygene was 0-61.16% in material I. The average heterosis of F1 was 1.16%, which was a mixture model of two major genes additive plus polygene additive-dominance. The heritability of major genes was 6.48%-54.18%, and the heritability of polygene was 4.77%-67.23% in material II. It was concluded that the ear row number was dominated by both major genes and polygene, and the super multiple ear row number in DH line 15D969 was controlled by incomplete dominant polygenes.

Key words: Maize, DH line, 15D969, Super multiple ear row number, Genetic analysis

Table 1

Germplasm origins and characteristics of ear row number of inbred lines or DH line"

自交系或DH系
Inbred line or DH line		 种质
Germplasm		 来源
Origin		 穗行数Ear row number
平均值Mean 最大值Max 最小值Min
A6 美国杂交种×丹340 中国（自选） 22 26 20
PHB1M 兰卡斯特Lancaster 美国 16 18 14
15D969 A6×PHB1M 中国（自选） 26 32 20
PH6WC 瑞德Reid 美国 16 18 14
X901m 瑞德Reid 美国 14 16 12

Table 2

Statistical parameters of ear row number in the six generations of two materials"

世代
Generation		 材料Ⅰ MaterialⅠ 材料Ⅱ MaterialⅡ
平均值
Mean		 最大值
Max		 最小值
Min		 变异系数
CV (%)		 平均值
Mean		 最大值
Max		 最小值
Min		 变异系数
CV (%)
P1 16.00 20 12 9.34 14.73 18 12 8.41
P2 25.52 30 20 8.22 24.81 30 22 6.68
F1 20.53 24 18 7.47 20.00 24 16 9.13
B1 18.90 26 14 13.61 17.95 26 14 12.39
B2 23.26 28 18 9.82 22.60 28 18 9.66
F2 20.75 28 14 12.65 19.31 26 14 13.20

Table 3

The AIC value for ear row number of six generations of 24 genetic models from two materials"

模型
Model		 AIC值AIC value 模型
Model		 AIC值AIC value
材料ⅠMaterialⅠ 材料ⅡMaterialⅡ 材料ⅠMaterialⅠ 材料ⅡMaterialⅡ
1MG-AD 1 854.51 2 544.17 MX1-AD-ADI 1 843.45 2 443.65
1MG-A 1 853.01 2 542.19 MX1-AD-AD 1 840.41 2 448.56
1MG-EAD 1 999.86 2 691.00 MX1-A-AD 1 838.19 2 440.64
1MG-AEND 2 014.05 2 753.75 MX1-EAD-AD 1 838.29 2 444.37
2MG-ADI 1 838.41 2 491.12 MX1-AEND-AD 1 838.28 2 444.38
2MG-AD 1 843.92 2 503.65 MX2-ADI-ADI 1 850.85 2 454.89
2MG-A 1 830.68 2 482.99 MX2-ADI-AD 1 798.71 2 450.01
2MG-EA 1 828.28 2 481.16 MX2-AD-AD 1 844.29 2 450.37
2MG-AED 2 020.66 2 826.38 MX2-A-AD 1 839.18 2 439.70
2MG-EEAD 2 018.66 2 824.38 MX2-EA-AD 1 838.23 2 444.32
PG-ADI 1 849.93 2 456.95 MX2-AED-AD 1 840.30 2 446.35
PG-AD 1 836.91 2 443.72 MX2-EEAD-AD 1 838.30 2 444.35

Table 4

Test for goodness of optimal models"

模型
Model		 群体
Population		 统计量Statistic
U12 U22 U32 nW2 Dn
MX2-ADI-AD P1 0.0002(0.9887) 0.0546(0.8153) 0.9790(0.3224) 0.8095**(0.0070) 0.0190(1)
F1 0.2727(0.6015) 0.2999(0.5839) 0.0282(0.8665) 0.5307*(0.0338) 0.0134(1)
P2 0.2073(0.6489) 0.0827(0.7736) 0.3755(0.5400) 0.3697(0.0911) 0.0168(1)
B1 0.0315(0.8590) 0.0016(0.9684) 0.2801(0.5967) 0.4198(0.0664) 0.0103(1)
B2 0.1209(0.7281) 0.5339(0.4650) 2.4836(0.1150) 0.5207*(0.0359) 0.0112(1)
F2 0.0018(0.9658) 0.0016(0.9678) 0(0.9960) 0.5420*(0.0316) 0.0056(1)
MX2-A-AD P1 0.2416(0.6230) 0.1558(0.6930) 0.1055(0.7453) 1.3043**(0.0010) 0.0140(1)
F1 0.0435(0.8348) 0.0270(0.8694) 0.0225(0.8809) 0.9725**(0.0030) 0.0143(1)
P2 0.0067(0.9346) 0.0414(0.8388) 0.2460(0.6199) 0.5525*(0.0297) 0.0229(1)
B1 1.4687(0.2256) 0.0144(0.9044) 17.7519**(0) 1.1831**(0.0010) 0.0101(1)
B2 1.5324(0.2158) 0.0501(0.8229) 15.2043**(0) 1.0685**(0.0010) 0.0326(0.9999)
F2 0.4719(0.4921) 0.4347(0.5097) 0.0005(0.9813) 0.8668**(0.0050) 0.0043(1)

Table 5

Estimate values of the first order genetic parameters"

一阶参数
First order parameter		 估计值 Estimate value 一阶参数
First order parameter		 估计值 Estimate value
MX2-ADI-AD MX2-A-AD MX2-ADI-AD MX2-A-AD
m 20.12 19.55 i 0.73
da -0.06 -1.96 jab -1.73
db -0.06 1.55 jba 1.85
ha -0.52 l -2.53
hb 2.40 [d] -5.25 -5.55
ha/da 8.67 [h] 1.11 0.31
hb/db -40.00 [h]/[d] -0.21 -0.06

Table 6

Estimate values of the second order genetic parameters"

二阶参数
Second order parameter		 估计值 Estimate value
MX2-ADI-AD MX2-A-AD
B1 B2 F2 B1 B2 F2
σp2 6.61 5.22 6.90 9.01 10.15 6.50
σmg2 0.81 5.03 3.36 0.96 0.66 3.52
σpg2 4.05 0.00 1.78 5.38 6.82 0.31
σ2 1.76 1.76 1.76 2.67 2.67 2.67
hmg2 (%) 12.22 96.37 48.71 10.66 6.48 54.18
hpg2 (%) 61.16 0.00 25.77 59.74 67.23 4.77
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