Analysis of combining Ability and Correlation on Yield, Brix and Three-ear-leaves Characters of waxy maize
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摘要: 摘要
目的 研究糯玉米产量和糖度的遗传规律,分析产量、糖度与棒三叶性状的相关性,为高糖度鲜食糯玉米选育与探究棒三叶性状对品质性状的影响的机制研究提供参考。 方法 本研究以6个自交系为测验种,对15份糯玉米骨干自交系为进行不完全双列杂交(NCII设计),测定杂交组合在采收期(授粉后21 d)果穗产量、籽粒可溶性糖含量(糖度)、棒三叶的叶长、叶宽、叶面积、以及其他10个穗部和植株相关的性状。其中穗重和糖度是主要关注的产量与品质性状,用以评价棒三叶对产量和品质的贡献;其他性状作为参考性状,用以衡量棒三叶对产量与品质的重要性。根据测定的数据分析果穗产量、糖度的一般配合力(GCA)和特殊配合力(SCA),研究棒三叶性状与产量品质性状的关系。 结果 棒三叶性状中叶片长度与果穗产量相关性强;而叶宽与糖度相关性强。果穗产量与糖度呈极显著负相关,因此在育种过程中应优先选择叶片长度适中,叶片宽度较宽的材料可提高高品质糯玉米的选择效率。 结论 棒三叶尤其是穗下叶和穗位叶的长度和宽度可以作为选择糯玉米育种材料的依据。 Abstract: :Objective To study the genetic rule of waxy maize yield and sugar degree, and analyze the correlation between yield, sugar degree and three ear leaves traits, so as to provide reference for breeding of fresh waxy maize with high sugar degree and explore the mechanism of the influence of three ear leaves traits on quality traits. Methods In this study, 6 inbred lines were used as test species, and 15 waxy maize inbred lines were selected for incomplete diallel hybridization (NCII design). The yield of ear, soluble sugar content (sugar degree) of grain, leaf length, leaf width, leaf area, and other 10 ear and plant-related traits of the hybrid combinations were measured at the harvest period (21 days after pollination). Panicle weight and sugar content were the main yield and quality traits to evaluate the contribution of L. trefoil to yield and quality. The other characters were used as reference characters to evaluate the importance of three ear leave to yield and quality. According to the measured data, general combining ability (GCA) and special combining ability (SCA) of ear yield and sugar content were analyzed. Results The results showed that there was a strong correlation between leaf length and ear yield in three ear leave characters. There was a strong correlation between leaf width and sugar content. There was a significant negative correlation between ear yield and sugar content, so materials with moderate leaf length and wide leaf width should be preferred in breeding process to improve the selection efficiency of high-quality waxy maize. Conclusion The study indicated that the length and width of the leaves, especially the lower ear leaves and ear position leaves, could be used as the basis for selecting breeding materials of waxy maize. -
Key words:
- Waxy maize /
- yield /
- Brix /
- combining ability /
- correlation analysis
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表 1 双列杂交的自交系
Table 1. Inbred lines for diallel crossing
株系类型
Type of lines株系编号
ID of lines测验种
Test linesTL1,TL2,TL3,TL4,TL5,TL6 被测种
Lines under testBF2003,BF2010,BF2001,BF2002,BF2006,BF2008,BF2009,BF2012,BF2017,BF2020,BF2022,BF2029,BF2032,BF2041,BF2042 表 2 调查的性状
Table 2. Investigated characters
性状类型
Type of traits性状
Traits产量性状
Yield trait穗重 Ear weight 品质性状
Quality trait糖度 Brix 穗部性状
Ear traits穗长 Ear length,穗粗 Ear diamete,穗行数 Rows per ear,行粒数 Kernel numbers per row,秃尖长 Barren tip lenghth 农艺性状
Agronomic trait株高 Plant height,穗位高 Ear height,穗位系数 Ear height coefficient,生育期 growth period,穗下叶宽 Lower ear Leaf width,穗下叶长 Lower ear leaf length,穗位叶宽 Ear Leaf width,穗位叶长 Ear leaf length,穗上叶宽 Upper ear Leaf width,穗上叶长 Upper ear leaf length,棒三叶宽 Ears three leaf width,棒三叶长 Ears three leaf length,穗下叶面积 Lower ear leaf area,穗位叶面积 Eear leaf area,穗上叶面积 Upper ear leaf area,棒三叶面积 Ear three leaf area,穗上叶夹角 Upper ear angle 表 3 方差分析表
Table 3. analysis of variance
变异来源
Source of
variation穗重
Ear
weight糖度
Brix生育期
Growth
period株高
Plant
height穗位
Ear
height穗位系数
Ear height
coefficient穗下叶长
Lower ear leaf
length穗下叶宽
Lower ear Leaf
width穗位叶长
Ear leaf
length穗位叶宽
Ear Leaf
width穗上叶长
Upper ear leaf
length穗上叶宽
Upper ear
Leaf width组合
Combination2.64** 5.86** 10.16** 4.06** 12.34** 7.90** 6.45** 6.03** 8.56** 3.94** 9.41** 5.05** P1 1.19 4.84** 1.52 2.92** 2.68** 2.08* 1.60 3.23** 2.18* 2.77** 2.87** 1.99* P2 3.80** 8.68** 2.34 5.53** 7.84** 10.63** 1.51 10.47** 2.87* 6.16** 4.28** 8.28** p1×p2 2.23** 2.88** 8.78** 2.61** 7.49** 4.62** 5.74** 3.20** 6.63** 2.51** 6.36** 3.23** 组合
Combination8.78** 5.50** 3.50** 2.81** 2.89** 2.99** 14.78** 26.99** 7.16** 10.47** 4.58** 3.27** P1 2.21* 2.82** 1.99* 2.08* 2.05* 2.00* 1.67 1.08 1.76 3.63** 1.19 1.63 P2 2.80* 8.31** 2.20 1.56 3.91* 1.91 10.85** 20.36** 8.27** 29.92 ** 7.63** 9.63** p1×p2 6.79** 3.24** 2.85** 2.34** 2.17** 2.47* 8.91** 12.85** 4.69** 3.44** 3.27** 2.07** **表示差异极显著,*表示显著。
** means very significant difference, * means significant.表 4 遗传力分析表
Table 4. Heritability analysis table
配合力方差估计
Variance estimation of
combining ability穗重
Ear
weight穗下叶长
Lower ear
leaf length糖度
Brix穗下叶宽
Lower ear
Leaf width一般配合力方差
Variance of GCA28.30% 13.96% 63.84% 59.30% 特殊配合力方差
Variance of SCA71.70% 86.04% 36.16% 40.70% 广义遗传力
h2B46.06% 73.38% 72.22% 73.03% 狭义遗传力
hN13.04% 10.25% 46.10% 43.31% 表 5 一般配合力(节选)
Table 5. General Combining ability (Excerpt)
穗重
Ear weightCGA 糖度
BrixCGA 1 BF2002 8.5578 1 BF2022 19.8197 2 TL4 6.7162 2 TL5 13.5624 3 TL6 3.9301 3 BF2008 13.25 4 BF2006 3.0874 4 BF2020 9.6581 5 BF2012 2.8835 5 TL3 8.6495 6 BF2041 2.272 6 BF2032 7.0346 7 BF2003 1.6604 7 BF2029 6.3003 8 BF2001 1.3206 8 BF2017 5.0624 9 BF2022 0.2333 9 BF2009 3.3535 10 BF2017 −0.1065 10 BF2012 2.7058 表 7 糖度排名前十位组合CGA和SGA排名
Table 7. Top ten combinations of CGA and SGA in sugar content ranking
亲本1
P1CGA排名
CGA ranking亲本2
P2CGA排名
CGA ranking穗重
Ear weightSGA SGA排名
CGA rankingTL5 2 BF2017 8 13.6665 26.287 1 TL5 2 BF2008 3 12.45 5.2003 27 TL3 5 BF2017 8 12.417 17.951 5 TL6 11 BF2022 1 12.35 11.9733 12 TL3 5 BF2022 1 12.25 1.4229 41 TL3 5 BF2020 4 12.0835 9.819 16 TL3 5 BF2029 7 12.083 13.1715 11 TL5 2 BF2006 16 11.8165 19.4399 3 TL5 2 BF2022 1 11.7835 -8.4366 74 TL5 2 BF2032 6 11.6165 2.5778 35 表 6 穗重前十位组合CGA和SGA排名
Table 6. Top ten combinations of CGA and SGA by ear weight
亲本1
P1CGA排名
CGA ranking亲本2
P2CGA排名
CGA ranking穗重
Ear weightSGA SGA排名
CGA rankingTL4 2 BF2009 14 0.311 21.1453 2 TL2 16 BF2017 10 0.295 22.0423 1 TL6 3 BF2001 8 0.295 15.0293 3 TL6 3 BF2002 1 0.2825 2.6955 33 TL4 2 BF2017 10 0.282 8.3698 14 TL6 3 BF2010 11 0.279 10.001 10 TL6 3 BF2029 12 0.279 10.6802 6 TL4 2 BF2042 13 0.278 7.5543 15 TL2 16 BF2006 4 0.274 10.2861 8 TL6 3 BF2012 5 0.273 4.4963 26 表 8 穗重和糖度与其他性状的相关系数
Table 8. Correlation coefficients between yield,quality characters and other characters
穗重
Ear weight糖度
Brix穗长
Ear length0.478** 生育期
Growth period0.349** 行粒数
Kernel numbers per row0.451** 穗下叶宽
Lower ear Leaf width0.314** 穗粗
Ear diameter0.410** 棒三叶宽
Ears three leaf width0.288** 穗下叶长
Lower ear leaf length0.271** 穗位叶宽
Ear Leaf width0.283** 棒三叶长
Ears three leaf length0.223** 穗位
Ear height0.271** 株高
plant height0.219* 穗位系数
Ear height coefficient0.260** 穗位叶长
Ear leaf length0.212* 株高
plant height0.217* 穗上叶长
Upper ear leaf length0.181* 穗上叶宽
Upper ear Leaf width0.213* 穗位叶面积
Ear leaf area0.180* 穗下叶面积
Lower ear leaf area0.180 棒三叶面积
Ear three leaf area0.180* 穗行数
Rows per ear0.156 穗下叶面积
Lower ear leaf area0.176* 棒三叶面积
Ear three leaf area0.140 穗位
Ear height0.121 穗位叶面积
Ear leaf area0.135 穗位叶宽
Ear Leaf width0.120 穗上叶面积
Upper ear leaf area0.079 穗上叶面积
Upper ear leaf area0.159 秃尖长
Barren tip length0.072 棒三叶宽
Ears three leaf width0.116 穗下叶长
Lower ear leaf length0.048 穗上叶宽
Upper ear Leaf width0.113 穗位叶长
Ear leaf length0.041 穗下叶宽
Lower ear Leaf width0.097 棒三叶长
Ears three leaf length0.041 穗位系数
Ear height coefficient0.075 穗上叶夹角
Upper ear angle0.041 秃尖长
Barren tip length0.062 穗上叶长
Upper ear leaf length0.033 穗上叶夹角
Upper ear angle0.042 穗粗
Ear diameter−0.025 生育期
Growth period0.021 穗长
Ear length−0.187* 穗行数
Rows per ear−0.089 行粒数
Kernel numbers per row−0.229* 糖度
Brix−0.394** 穗重
Ear weight−0.394** **表示极显著相关,*表示显著相关。
** means very significant correlation, * means significant correlation. -
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