Crops ›› 2020, Vol. 36 ›› Issue (1): 194-198.doi: 10.16035/j.issn.1001-7283.2020.01.031

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Inheritance of Seed Dormancy in F1 of DH Lines of Maize

Li Zhongnan1,Zhang Xiaohui1,Wang Yueren2,Zhang Yanhui2,Wu Shenghui2,Xu Zhengxue2,Li Guangfa2()   

  1. 1Agricultural and Technology Extension Station of Jilin Province, Changchun 130033, Jilin, China
    2Tonghua Academy of Agricultural Sciences, Meihekou 135007, Jilin, China
  • Received:2019-06-24 Revised:2019-09-14 Online:2020-02-15 Published:2020-02-23
  • Contact: Guangfa Li E-mail:lgftn666@sina.com

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Abstract:

The seedling emergence time of the first generation seeds of DH lines induced by haploid natural doubling and self-fertilization from four hybrids PH12TB×Tong D1279, PHB1M×Tong D1279, Tong A6×Tong D1279 and 826F×Tong D1279 was investigated continuously for 52 days, and the dormancy of the first generation (F1) seeds of DH lines was studied using the genetic model of the main gene plus multi-gene DH population and the mixed distribution method. The results showed that the dormancy of seeds was determined by four major genes, which had additive and epistatic effects in this section where all seedlings could emerge. The heritability of the major genes was 99.12%-99.50%.

Key words: Maize, DH line, Seed, Dormancy

Table 1

Germplasm origins of inbred lines and DH lines"

自交系或DH系Inbred line or DH line 种质Germplasm 来源Origin 穗发芽Germination of ear 种子硬实Hard seed
PH12TB 兰卡斯特Lancaster 美国 无 无
PHB1M 兰卡斯特Lancaster 美国 无 无
通A6 Tong A6 美国杂交种×丹340 中国（自选） 无 无
826F 兰卡斯特Lancaster 美国 无 无
通D1279 Tong D1279 PH4CV×(丹340×吉853) 中国（自选） 无 无

Table 2

Number of haploid setting plants and haploid setting plant rates of materials"

材料
Material		 单倍体株数
Number of haploid plants		 结实株数
Number of
setting plants		 结实株率(%)
Setting
plant rate
PH12TB×通D1279
PH12TB×Tong D1279		 5 342 103 1.93
PHB1M×通D1279
PHB1M×Tong D1279		 3 320 124 3.73
通A6×通D1279
Tong A6×Tong D1279		 2 358 106 4.50
826F×通D1279
826F×Tong D1279		 5 120 86 1.68

Table 3

Emergence rate of four DH lines"

DH系
DH line		 播种数
Number of sowing		 出苗数
Number of emergence		 不出苗数
Number of no emergence		 出苗率(%)
Emergence rate		 未出苗率(%)
No emergence rate
PH12TB×通D1279 PH12TB×Tong D1279 103 97 6 94.17 5.83
PHB1M×通D1279 PHB1M×Tong D1279 124 119 5 95.97 4.03
通A6×通D1279 Tong A6×Tong D1279 106 101 5 95.28 4.72
826F×通D1279 826F×Tong D1279 86 82 4 95.35 4.65

Table 4

Days of sowing-emergence and detection values of DH lines"

DH系
DH line		 播种-出苗天数Days of sowing-emergence (d) 最长天数(d)
Maximum days		 变异系数(%)
Coefficient of variation		 P 正态分布
Normal distribution
16~19 20~23 24~27 28~31 32~35 36~39 40~43 44~47
PH12TB×通D1279
PH12TB×Tong D1279		 69 14 4 6 4 0 0 0 35 22.58 0.00 不符合
PHB1M×通D1279
PHB1M×Tong D1279		 87 18 2 4 5 1 1 1 45 28.40 0.00 不符合
通A6×通D1279
Tong A6×Tong D1279		 53 21 4 9 9 3 1 1 47 32.33 0.00 不符合
826F×通D1279
826F×Tong D1279		 60 12 0 3 3 3 1 0 42 31.07 0.00 不符合

Table 5

Maximum logarithmic quasi-likelihood function value and AIC value of emergence days of DH lines"

DH系 DH line 模型Model 极大对数似然函数值Maximum logarithmic quasi-likelihood function value AIC值AIC value
PH12TB×通D1279 PH12TB×Tong D1279 4MG-AI -737.557 1 515.114
PHB1M×通D1279 PHB1M×Tong D1279 4MG-AI -820.783 1 681.566
通A6×通D1279 Tong A6×Tong D1279 4MG-AI -868.099 1 776.198
826F×通D1279 826F×Tong D1279 4MG-AI -771.355 1 582.710

Table 6

Test for goodness of candidate models of DH lines"

DH系
DH line		 统计量Statistic
U12 U22 U32 nW2 Dn
PH12TB×通D1279 PH12TB×Tong D1279 0.0001(0.9941) 8.4244**(0.0037) 134.1280**(0) 18.7898(0.0606) 0.0022(1)
PHB1M×通D1279 PHB1M×Tong D1279 0.0006(0.9803) 6.1564*(0.0131) 96.6135**(0) 15.5869*(0.0453) 0.0022(1)
通A6×通D1279 Tong A6×Tong D1279 0.0003(0.9868) 8.2347**(0.0041) 130.2889**(0) 18.1582(0.0577) 0.0022(1)
826F×通D1279 826F×Tong D1279 0.0059(0.9389) 11.8098**(0.0006) 180.8844**(0) 21.2230(0.0718) 0.0022(1)

Table 7

Estimates of genetic parameters of DH lines"

参数
Parameter		 PH12TB×通D1279
PH12TB×Tong D1279		 PHB1M×通D1279
PHB1M×Tong D1279		 通A6×通D1279
Tong A6×Tong D1279		 826F×通D1279
826F×Tong D1279
m 6.2957 9.0316 8.6960 7.1725
da 5.2708 5.9071 5.8709 5.6991
db 5.2708 5.9071 5.8709 5.6991
dc -0.9129 3.0625 2.8060 -1.3858
dd -1.1469 -1.2804 -1.1169 -1.5894
iab 5.2708 5.9071 5.8709 5.6991
iac -0.9129 3.0625 2.8060 -1.3858
iad -1.1469 -1.2804 -1.1169 -1.5894
ibc -0.9129 3.0625 2.8060 -1.3858
ibd -1.1469 -1.2804 -1.1169 -1.5894
icd 1.0861 -3.1245 -2.8250 1.4914
σ2p 67.8969 78.2824 89.7644 60.3217
σ2mg 67.5574 77.8675 89.2079 59.7909
σ2 0.3395 0.4149 0.5565 0.5308
h2mg (%) 99.5000 99.4700 99.3800 99.1200
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