Comprehensive evaluation of seed and fruit traits of thin shell of pecan clones
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摘要:
目的 探究薄壳山核桃成分组成、含量差异及各品质性状之间相关性,为优良种质资源的挖掘和优良新无性系的选育提供参考。 方法 对50个无性系的种仁含油率、脂肪酸、酚类物质含量、核果质量、核果高、核果径、仁质量等性状进行测定,分析各性状之间相关性,并基于主成分分析模型进行综合评价。 结果 (1)含油率均处于70.09% ~ 79.99%之间,其中JD25、JD13、JD6、JH3、JD23、XS3、JD27和 JD28含油率均值较大。(2)油脂中共检测出8种脂肪酸,且脂肪酸各成分的相对含量存在差异,其中JH1、JD21、XS3、JD27和XS7不饱和脂肪酸含量高于其他无性系。(3)各个性状之间存在显著差异,其中不饱和脂肪酸变异系数为0.38%,最为稳定;总黄酮与缩合单宁变异系数为51.22%和49.88%,属高度变异。(4)采用主成分分析模型对50个无性系进行综合评价,其中XS12、XS1、JD23、XS3、JH1、XS8、JD30和JD29排名靠前。 结论 综合含油率和主成分分析模型排名考虑,分别选择各自排名前3和两者共有的无性系,即JD23、XS3、XS12、XS1、JD25、JD13和JD6作为优良种质资源和优良无性系进行培育与选育。 Abstract:Objective This paper aims to explore the composition, content difference and correlation of the components of pecans, and to provide a reference for the mining of superior germplasm resources and the breeding of superior new clones. Method The oil content, fatty acid, phenolic substance content, drupe mass, drupe height, drupe diameter, and kernel mass of 50 clones were measured to analyze the correlation among the traits, and comprehensive evaluation was made based on the principal component analysis model. Result (1) The oil content ranged from 70.09% to 79.99%, among which the mean oil contents of JD25, JD13, JD6, JH3, JD23, XS3, JD27 and JD28 were higher. (2) A total of 8 kinds of fatty acids were detected, and the relative contents of fatty acids were different, among which the contents of JH1, JD21, XS3, JD27 and XS7 unsaturated fatty acids were higher than those of other varieties. (3) There were significant differences among traits, and the variation coefficient of unsaturated fatty acids was 0.38%, which was the most stable one. The coefficients of variation of total flavonoids and condensed tannin were 51.22% and 49.88%, respectively, which were high variables. (4) Principal component analysis was used to comprehensively evaluate the 50 clones, among which, XS12, XS1, JD23, XS3, JH1, XS8, JD30 and JD29 ranked the top. Conclusion Considering the comprehensive oil content and principal component analysis model ranking, the top 3 clones of each and the clones shared by both, i.e. JD23, XS3, XS12, XS1, JD25, JD13 and JD6 are selected as excellent germplasm resources and excellent clones for cultivation and breeding. -
Key words:
- Carya illinoensis /
- nutritional property /
- economic trait /
- correlation /
- principal component analysis
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表 1 不同薄壳山核桃无性系含油率变异分析
Table 1. Variation analysis of oil contents in different pecan cultivars
无性系
Clone含油率
Oil content/%无性系
Clone含油率
Oil content/%JD1 76.89 ± 0.44ijklm JD26 78.28 ± 0.19def JD2 70.77 ± 0.42v JD27 78.63 ± 0.37bcde JD3 73.05 ± 0.83t JD28 78.50 ± 0.12cde JD4 76.75 ± 0.63jklm JD29 74.54 ± 0.45s JD5 75.40 ± 0.31pqr JD30 76.63 ± 0.31klm JD6 79.17 ± 0.23bc XS1 78.24 ± 0.19def JD7 75.25 ± 0.38pqr XS2 75.49 ± 0.25pqr JD8 71.90 ± 0.50u XS3 78.78 ± 0.19bcd JD9 76.54 ± 0.66klmn XS4 76.28 ± 0.20mno JD10 77.76 ± 0.61fgh XS5 75.68 ± 0.36opq JD11 76.50 ± 0.12lmn XS6 75.81 ± 0.46op JD12 75.47 ± 0.06pqr XS7 77.42 ± 0.14ghij JD13 79.30 ± 0.11b XS8 75.42 ± 0.36pqr JD14 76.74 ± 0.27jklm JH1 74.96 ± 0.04rs JD15 77.54 ± 0.10ghi JH2 78.28 ± 0.22def JD16 77.71 ± 0.20fgh JH3 78.99 ± 0.20bc JD17 76.97 ± 0.19ijklm JH4 77.26 ± 0.14hijk JD18 76.87 ± 0.54ijklm JH5 77.06 ± 0.41hijkl JD19 70.09 ± 0.50w JD31 77.75 ± 0.40fgh JD20 76.74 ± 0.32jklm XS9 74.44 ± 0.48s JD21 75.41 ± 0.33pqr XS10 75.93 ± 0.09nop JD22 77.27 ± 0.23hijk XS11 77.18 ± 0.44hijkl JD23 78.81 ± 0.43bcd XS12 76.34 ± 0.82mno JD24 78.00 ± 0.14efg XS13 75.02 ± 0.54qrs JD25 79.99 ± 0.13a XS14 72.21 ± 0.12u 注:不同小写字母表示在P < 0.05时差异显著。Note: different lowercase letters indicate significant differences at P < 0.05 level. 表 2 脂肪酸各成分相对含量多样性统计分析
Table 2. Statistical analysis of the diversity of fatty acid components
% 指标
Index最小值
Min. value最大值
Max. value平均值
Average中位数
MedianCV 棕榈酸 Palmitic acid 4.98 6.81 5.93 5.92 6.25 硬脂酸 Stearic acid 1.88 3.37 2.50 2.48 13.44 花生酸 Peanut acid 0.07 0.15 0.11 0.12 10.40 棕榈烯酸 Palmitoleic acid 0.04 0.09 0.07 0.07 23.02 油酸 Oleic acid 61.20 76.60 70.75 71.35 5.57 顺-11-二十碳烯酸 cis-11-eicosenoic acid 0.22 0.34 0.27 0.27 8.74 亚油酸 Linoleic acid 14.00 28.80 19.37 18.75 18.96 亚麻酸 Linolenic acid 0.74 1.54 1.01 0.98 17.81 表 3 16个性状的统计多样性分析
Table 3. Statistical diversity analysis of 16 traits
指标
Index最小值
Min. value最大值
Max. value平均值
Average中位数
MedianCV/% 含油率
Oil content/%70.09 79.99 76.41 76.74 2.74 饱和脂肪酸 Saturated fatty acid/% 7.78 9.28 8.54 8.53 3.99 不饱和脂肪酸
Unsaturated fatty acid/%90.72 92.20 91.46 91.48 0.38 单不饱和脂肪酸
Monounsaturated fatty acid/%61.53 76.96 71.08 71.68 5.55 多不饱和脂肪酸
Polyunsaturated fatty acid/%14.74 30.04 20.38 19.67 18.68 单个核果质量 Mass per drupe/g 4.94 10.10 7.54 7.41 19.06 核果高
Drupe height/mm31.58 54.30 39.79 39.12 12.05 核果径
Drupe diameter/mm17.10 25.12 21.61 21.68 9.24 仁质量
Kernel mass/g2.47 5.29 3.85 3.86 21.35 果壳质量
Fruit shell mass/g0.56 1.93 0.90 0.85 23.53 出仁率
Kernel content/%0.36 0.60 0.51 0.52 8.81 含壳率
Shell content/%0.40 0.64 0.49 0.48 9.18 缩合单宁
Condensed tannin/%0.32 2.39 0.99 0.86 49.88 总酚
Total phenol/%1.94 5.74 3.45 3.42 24.18 总黄酮
Total flavonoids/%0.91 5.07 2.08 1.80 51.22 鞣花酸
Ellagic acid/%0.05 0.22 0.10 0.10 35.16 表 4 6个主成分的特征值、贡献率和累积贡献率
Table 4. Eigenvalues, contribution rates and cumulative contribution rates of the 6 principal components
主成分
Principal
component特征值
Eigenvalue贡献率
Contribution rate/%累计贡献率
Cumulative
contribution rate/%1 5.396 29.976 29.976 2 3.081 17.119 47.095 3 2.105 11.692 58.787 4 1.989 11.052 69.838 5 1.284 7.134 76.973 6 1.100 6.112 83.085 表 6 50个薄壳山核桃无性系各性状分析
Table 6. Analysis of characters of 50 pecan clones
无性系
Clone不饱和脂肪酸
Unsaturated fatty acid/%单个核果质量
Mass per drupe/g仁质量
Kernel mass/g出仁率
Kernel content/%儿茶素
Catechin/%缩合单宁
Condensed tannin/%总酚
Total phenol/%总黄酮
Total flavonoids/%鞣花酸
Ellagic acid/%含油率
Oil content/%XS12 91.70 9.97 5.13 0.51 0.33 2.39 5.74 5.07 0.11 0.78 XS1 91.43 9.26 4.37 0.47 0.52 0.96 4.14 1.93 0.10 0.79 JD23 91.28 9.53 4.32 0.45 0.56 0.56 3.59 1.15 0.06 0.70 XS3 92.15 5.91 2.80 0.47 1.01 2.32 4.32 5.03 0.10 0.77 JH1 92.04 7.15 3.53 0.49 0.71 1.32 3.60 2.13 0.10 0.77 XS8 91.49 8.61 3.88 0.45 0.36 1.86 3.37 4.24 0.14 0.77 JD30 91.31 6.70 3.61 0.54 0.40 2.00 5.35 4.93 0.12 0.76 JD29 90.86 7.35 3.74 0.51 0.37 0.60 4.57 1.39 0.20 0.78 JD1 91.77 8.84 4.93 0.56 0.52 0.67 3.15 1.61 0.08 0.77 JD2 91.21 7.62 4.21 0.55 0.35 0.66 4.24 1.40 0.11 0.80 JD3 91.50 8.00 4.20 0.52 0.12 0.87 3.10 1.80 0.06 0.75 JD4 91.16 5.92 2.66 0.45 0.51 0.85 4.22 1.80 0.06 0.77 JD5 90.91 7.85 4.08 0.52 0.38 0.54 3.47 1.22 0.13 0.79 JD6 91.48 5.29 3.04 0.58 0.37 0.44 2.52 1.11 0.00 0.78 JD7 91.28 6.24 2.96 0.47 0.29 0.57 2.42 0.99 0.06 0.75 JD8 90.99 5.48 2.73 0.50 0.52 1.13 3.35 2.33 0.11 0.75 JD9 91.53 10.03 5.18 0.52 0.23 0.44 2.47 0.91 0.09 0.78 JD10 91.51 9.90 5.16 0.52 0.24 0.51 2.81 1.13 0.07 0.76 JD11 91.29 9.32 5.00 0.54 0.41 0.96 2.64 2.32 0.12 0.79 JD12 91.19 8.29 4.50 0.54 0.35 0.82 1.94 1.97 0.11 0.78 JD13 90.72 9.30 5.07 0.54 0.40 0.80 3.65 1.70 0.06 0.79 JD14 91.08 7.88 4.23 0.54 0.30 1.37 3.73 1.29 0.08 0.75 JD15 91.43 6.78 3.55 0.52 0.39 0.95 3.97 2.22 0.11 0.75 JD16 91.64 8.04 4.25 0.53 0.44 1.12 3.36 1.59 0.07 0.77 JD17 91.11 6.00 2.95 0.49 0.43 0.93 4.41 2.43 0.07 0.75 JD18 91.47 8.18 3.84 0.47 0.53 0.53 2.32 1.18 0.09 0.77 JD19 91.34 9.43 5.29 0.56 0.29 1.50 5.47 2.94 0.09 0.77 JD20 91.38 7.90 4.42 0.56 0.30 0.73 3.25 2.06 0.12 0.79 JD21 92.19 6.88 4.10 0.60 0.55 1.03 3.84 2.49 0.22 0.75 JD22 91.57 8.45 3.80 0.45 0.48 1.27 3.91 2.07 0.15 0.72 JD24 91.74 7.48 3.80 0.51 0.43 1.31 3.90 2.50 0.09 0.77 JD25 91.68 6.50 3.31 0.51 0.27 0.32 2.48 1.15 0.06 0.76 JD26 91.35 6.19 3.57 0.58 0.28 0.40 2.88 1.19 0.08 0.76 JD27 92.20 4.94 2.62 0.53 0.44 0.98 3.54 2.03 0.08 0.77 JD28 91.54 7.24 4.14 0.57 0.33 0.54 2.48 1.30 0.11 0.77 XS2 91.07 8.45 4.18 0.50 0.38 0.76 2.73 1.69 0.15 0.78 XS4 91.44 6.36 3.19 0.50 0.79 0.61 3.26 1.27 0.09 0.73 XS5 91.74 9.26 4.33 0.47 0.45 0.52 2.55 1.21 0.09 0.71 XS6 91.62 9.54 5.21 0.55 0.48 1.10 3.64 2.27 0.09 0.77 XS7 92.02 6.49 2.98 0.46 0.48 0.55 3.66 1.29 0.21 0.76 JH2 91.52 6.78 3.49 0.52 0.37 0.85 3.75 2.12 0.11 0.78 JH3 91.63 10.10 5.17 0.51 0.71 1.71 3.06 3.79 0.09 0.75 JH4 91.48 5.65 2.57 0.45 0.56 0.80 2.56 1.67 0.07 0.72 JH5 91.48 5.72 2.47 0.43 0.50 1.21 4.15 1.58 0.13 0.76 JD31 91.33 7.58 3.97 0.52 1.38 1.83 2.41 3.88 0.08 0.78 XS9 91.91 7.00 3.38 0.48 0.51 1.36 2.70 2.46 0.10 0.77 XS10 91.65 6.91 2.48 0.36 0.30 0.93 2.84 1.27 0.12 0.75 XS11 91.06 5.32 3.01 0.57 0.42 1.47 3.16 3.64 0.09 0.74 XS13 91.96 6.53 3.38 0.52 0.56 0.68 3.69 1.39 0.13 0.78 XS14 90.75 7.10 3.90 0.55 0.50 0.78 4.08 1.98 0.13 0.77 表 5 6个主成分的特征向量
Table 5. Feature vectors of 6 principal components
指标
Index主成分1
Principal
component 1主成分2
Principal
component 2主成分3
Principal
component 3主成分4
Principal
component 4主成分5
Principal
component 5主成分6
Principal
component 6多不饱和脂肪酸
Polyunsaturated fatty acid−0.952 0.180 0.173 −0.095 0.049 0.046 亚油酸
Linoleic acid−0.948 0.191 0.167 −0.096 0.048 0.035 单不饱和脂肪酸
Monounsaturated fatty acid0.948 −0.212 −0.174 0.121 −0.024 −0.011 油酸
Oleic acid0.948 −0.211 −0.174 0.122 −0.027 −0.011 亚麻酸
Linolenic acid−0.777 −0.089 0.260 −0.047 0.054 0.244 仁质量
Kernel mass0.437 0.828 0.277 0.135 0.014 0.115 单个核果质量
Mass per drupe0.276 0.733 0.389 0.452 −0.073 0.082 不饱和脂肪酸
Unsaturated fatty acid0.341 −0.428 −0.075 0.335 0.260 0.367 棕榈烯酸
Palmitoleic acid−0.233 0.326 −0.648 −0.073 −0.184 0.168 总酚
Total phenol0.245 −0.179 0.632 −0.294 −0.075 −0.416 总黄酮
Total flavonoids0.314 −0.252 0.566 −0.239 −0.192 0.244 顺-11-二十碳烯酸
cis-11-eicosenoic acid0.290 −0.364 0.510 −0.062 0.499 −0.129 出仁率
Kernel content0.421 0.454 −0.169 −0.689 0.243 0.139 含壳率
Shell content−0.421 −0.454 0.169 0.689 −0.243 −0.139 核果径
Drupe diameter0.108 0.601 0.102 0.665 0.194 0.014 含油率
Oil content−0.059 0.083 0.131 0.004 0.663 0.253 核果高
Drupe high0.365 0.448 0.386 −0.244 −0.454 0.093 儿茶素
Catechin0.078 −0.44 0.226 −0.014 −0.275 0.703 -
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