Crops ›› 2016, Vol. 32 ›› Issue (1): 23-27.doi: 10.16035/j.issn.1001-7283.2016.01.005

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Differential Analysis of Kernel Traits for Maize Inbred Lines and Hybrids from Different Sources

Li Yanan,Aye Nyein Chan,Feng Yuran,Dong Yuan,Shi Yaqin,Wang Boxin,Xu Shutu,Xue Jiquan   

  1. College of Agronomy,Northwest A & F University,Yangling 712100,Shaanxi,China
  • Received:2015-09-07 Revised:2015-12-21 Online:2016-02-15 Published:2018-08-25
  • Contact: Jiquan Xue

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Abstract:

The research on maize heterosis plays an important role in improving yield and quality of maize.In this study,we measured kernel-related traits of 89 temperate inbred lines,59 tropical/subtropical inbred lines and 179 F1 hybrid assembled from the 148 inbred lines.All inbreds were planted,harvested and cross-pollinated in Hainan in 2013.We analyzed the diversity and difference of grain traits between temperate and tropic/subtropical inbred lines and different F1 hybrid types which were divided based on the origin of parents.The results showed that:The grain length and hundred-grain weight of temperate inbreds was longer and heavier than those of tropic/subtropical;In F1 hybrid,kernel length of temperate inbreds showed longer than that of tropic/subtropical;The heterosis analysis showed that the F1 hybrids had relative better-parent heterosis and relative mid-parent heterosis in grain thickness and grain weigh than grain length and kernel width.

Key words: Maize, Kernel traits, Tropic/subtropical material, Temperate material

Fig.1

Normal distribution chart for the traits in 179 F1 hybrids of maize"

Fig.2

Normal distribution chart for the traits in 148 maize inbreds lines"

Table 1

Basic statistic description of kernel trait in inbred lines and hybrids"

类别Category 平均值+标准偏差 Mean ± Std. Deviation
粒厚Kernel thick (mm) 粒长 Kernel length (mm) 粒宽 Kernel wide (mm) 百粒重 Hundred kernel weight (g)
杂交当代F1Hybrids F1 5.13±0.65** 10.17±1.08* 8.73±0.71** 30.01±6.40**
自交系Inbreds lines 4.80±0.51 9.93±0.88 8.96±0.74 27.53±4.58

Table 2

Correlation analysis between different kernel traits in inbred lines and hybrids"

类别Category 粒厚
Kernel thick(mm)		 粒长
Kernel length(mm)		 粒宽
Kernel wide(mm)		 百粒重
Hundred kernel weight(g)
粒厚 Kernel thick 1 0.08 0.16 0.25**
粒长 Kernel length -0.03 1 0.08 0.37**
粒宽 Kernel wide 0.13 0.16 1 0.27**
百粒重 Hundred kernel weight 0.45** 0.53** 0.58** 1

Table 3

Basic description for kernel trait in inbred lines and hybrids F1 from different growth"

类别Category 粒厚
Kernel thick (mm)		 粒长
Kernel length (mm)		 粒宽
Kernel wide (mm)		 百粒重
Hundred kernel weight(g)
自交系 Inbreds lines T 4.82±0.49 10.12±0.89 8.95±0.82 28.28±5.04
S 4.76±0.55 9.65±0.79** 8.97±0.58 26.39±3.51*
杂交当代 F1Hybrids F1 T/T 5.22±0.68 10.35±1.15 8.64±0.75 30.53±6.86
T/S 5.00±0.65 10.58±1.23 8.82±0.69 31.05±7.07
S/T 5.13±0.66 9.79±0.80 8.78±0.76 28.79±4.67
S/S 5.06±0.52 9.73±0.74 8.83±0.54 29.01±6.69
母本Female T 5.15±0.68 10.42±1.18 8.70±0.73 30.71±6.90
S 5.10±0.61 9.77±0.77** 8.79±0.69 28.89±5.38
父本Male T 5.19±0.67 10.13±1.06 8.69±0.75 29.86±6.14
S 5.02±0.60 10.25±1.14 8.82±0.63 30.30±6.94

Table 4

Relative better-parent heterosis and relative mid-parent heterosis analyses in hybrids F1"

类别Category 粒厚 Kernel thick（mm） 粒长 Kernel length（mm） 粒宽 Kernel wide（mm） 百粒重 Hundred kernel weight（g）
最小值Minimum -21.43（-12.94） -35.62（-33.88） -29.87（-19.70） -64.51（-54.99）
最大值Maximum 46.62（51.05） 36.70（43.46） 16.93（20.09） 111.74（123.50）
平均值Mean 3.56（9.32） -4.21（0.39） -5.94（-1.90） 1.73（9.31）
标准差Standarddeviation 1.25（1.22） 0.94（0.94） 0.70（0.67） 2.33（2.37）
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