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作物学报

作物学报 ›› 2023, Vol. 49 ›› Issue (6): 1601-1615.doi: 10.3724/SP.J.1006.2023.24115

• 耕作栽培·生理生化 • 上一篇    下一篇

高产油菜品种稳产性形成机制

余新颖(), 王春云, 李大双, 王宗铠, 蒯婕, 汪波, 王晶, 徐正华, 周广生*()   

  1. 华中农业大学植物科学技术学院/农业农村部长江中游作物生理生态与耕作重点实验室, 湖北武汉 430070
  • 收稿日期:2022-05-10 接受日期:2022-09-05 出版日期:2023-06-12 网络出版日期:2022-09-16
  • 通讯作者: *周广生, E-mail: zhougs@mail.hzau.edu.cn
  • 作者简介:E-mail: 2075386202@qq.com
  • 基金资助:
    国家重点研发计划项目(2020YFD1000900);湖北现代农业产业技术体系项目和中央高校基本科研业务费专项基金项目(2662019PY076)

Formation mechanism of yield stability in high-yielding rapeseed varieties

YU Xin-Ying(), WANG Chun-Yun, LI Da-Shuang, WANG Zong-Kai, KUAI Jie, WANG Bo, WANG Jing, XU Zheng-Hua, ZHOU Guang-Sheng*()   

  1. College of Plant Science and Technology, Huazhong Agricultural University/Key Laboratory of Crop Ecophysiology and Farming System for the Middle Reaches of the Yangtze River, Ministry of Agriculture and Rural Affairs, Wuhan 430070, Hubei, China
  • Received:2022-05-10 Accepted:2022-09-05 Published:2023-06-12 Published online:2022-09-16
  • Contact: *E-mail: zhougs@mail.hzau.edu.cn
  • Supported by:
    National Key Research and Development Program of China(2020YFD1000900);Hubei Province Modern Agricultural Industry Technology System Project, and the Fundamental Research Funds for the Central Universities(2662019PY076)

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摘要：

作物生产中, 稳产与高产同等重要。本试验以高产但稳产性存在差异的品种“湘杂油518”和“大地199”为材料, 分别在武汉和兰州进行播期、施氮量、种植密度的单因素田间试验, 测定农艺及生理指标、各处理籽粒产量, 计算其变异系数, 探究主要农艺性状与稳产性的关联度, 为油菜大面积丰产及良种选育提供理论依据。结果表明, (1) 播期、氮肥及密度显著影响油菜产量; 相同试点, 两品种的最高产量差异不显著, 但其在各处理间的稳产性差异明显; 本试验中, 大地199在不同播期、氮肥处理下产量变异系数均低于湘杂油518, 稳产性较强。(2) 与湘杂油518相比, 大地199各关键生育期的叶面积指数(leaf area index, LAI)、光能利用效率(light energy utilization efficiency, LUE)、地上部干物质累积量和花期根系形态等指标均较优, 且变异系数小, 是其高产且稳产性强的基础。(3) 灰色关联度分析发现, 各处理条件下, 油菜籽粒产量与群体角果数、花期地上部干重和平均根直径等指标关联度较大; 且产量变异系数与群体角果数、花期地上部干重和平均根直径变异系数极显著正相关。综上, 优化油菜群体角果数、花期地上部干重和平均根直径等指标, 可为油菜品种选育及大面积丰产提供理论支撑。

关键词: 油菜, 栽培措施, 高产, 稳产性

Abstract:

In crop production, yield stability is as important as high yield. To explore the relationship between main agronomic traits and yield stability and to provide a theoretical basis for large-scale high yield and improved variety breeding of rapeseed, a single factor field experiments of sowing date, nitrogen rate, and planting density were carried out in Wuhan and Lanzhou. The high yielding varieties [Xiangzayou 518 (XZY 518) and Dadi 199 (DD 199)] with different yield stability were used as the materials, the agronomic, physiological indices and the yield of each treatment were measured, and the variation coefficient of each index was calculated. The results showed that: (1) Sowing date, nitrogen rate, and plant density significantly affected the rapeseed yield. There was no significant difference in the maximum yield between two varieties, however there was a significant difference in the yield stability among these treatments. The yield variation coefficients of DD 199 were lower than that of XZY 518 with the strong stability. (2) Compared with XZY518, the indices of leaf area index (LAI), light energy utilization efficiency (LUE), aboveground dry matter accumulation, and root morphology at flowering stage of DD 199 were better, while the variation coefficient of were smaller, which was the basis of high and stable yield. (3) Grey correlation analysis showed that under each treatment, the yield of rapeseed was significantly positive correlated with the population pod number, aboveground dry weight, and average root diameter at flowering stage. In addition, the variation coefficient of population pod number, aboveground dry weight, and average root diameter at flowering stage were significantly positively correlated with the variation coefficient of yield. In conclusion, optimizing the indices such as population pod number, aboveground dry weight, and average root diameter at flowering stage can provide a theoretical support for breeding of rapeseed variety and achieving high yield at large-scale.

Key words: rapeseed, cultivated measures, high yield, yield stability

图1

不同生态区主要气候因子"

表1

各单因素处理水平及其他关键栽培参数"

处理
Treatment		 试验点
Experimental site		 参数及代号
Parameters and codes		 其他栽培参数
Other cultivation parameters
播期
Sowing date		 武汉
Wuhan		 9/20 (S1) 10/5 (S2) 10/20 (S3) 氮肥: 240
Nitrogen: 240		 密度: 45
Density: 45
兰州
Lanzhou		 4/6 (S1) 4/13 (S2) 4/20 (S3) 氮肥: 240
Nitrogen: 240		 密度: 45
Density: 45
氮肥
Nitrogen		 武汉, 兰州Wuhan, Lanzhou 120 (N1) 240 (N2) 360 (N3) 播期:10/5, 4/13
Sowing date: 10/5, 4/13		 密度: 45
Density: 45
密度
Density		 武汉, 兰州Wuhan, Lanzhou 15 (D1) 45 (D3) 75 (D5) 播期: 10/5, 4/13
Sowing date: 10/5, 4/13		 氮肥: 240
Nitrogen: 240

表2

两试验点不同处理从播种至各生育期时期指标测定天数"

处理
Treatment		 2020-2021武汉 2020-2021 Wuhan 2021 兰州 2021 Lanzhou
苗期
Seedling stage		 薹期
Bolting stage		 花期
Flowering stage		 角果期
Maturity stage		 苗期
Seedling stage		 薹期
Bolting stage		 花期
Flowering stage		 角果期Maturity stage
S1 76 135 166 212 53 65 87 116
S2 76 135 166 212 53 65 87 116
S3 99 138 170 215 58 69 91 118
N1 76 135 166 212 53 65 87 116
N2 76 135 166 212 53 65 87 116
N3 76 135 166 212 53 65 87 116
D1 76 135 166 212 53 65 87 116
D2 76 135 166 212 53 65 87 116
D3 76 135 166 212 53 65 87 116

表3

关键栽培措施对油菜产量及其构成的影响"

栽培措施 Cultivation measures 品种Variety 处理Treatment 武汉 Wuhan (2020-2021) 兰州 Lanzhou (2021)
单株角果数Pods per plant 每角果粒数Seeds per pod 千粒重1000-seed
weight (g)		 单株产量Yield per plant 成株率Survival
rate (%)		 实际产量Actual yield
(kg hm-2)		 理论产量Theoretical yield (kg hm-2) 单株角果数Pods per plant 每角果粒数Seeds per pod 千粒重1000-seed
weight (g)		 单株产量Yield per plant 成株率Survival rate (%) 实际产量Actual yield
(kg hm-2)		 理论产量Theoretical yield (kg hm-2)
播期Sowing date XZY518 S1 145.9 a 19.7 a 3.60 b 10.40 a 65.5 d 2843.6 a 3074.5 a 94.1 d 19.7 a 3.63 a 6.72 b 94.3 ab 2802.7 c 2850.2 c
S2 135.8 b 17.7 b 3.47 bc 8.32 c 80.3 b 2555.1 bc 2975.7 ab 127.4 b 20.4 a 3.49 bc 9.05 a 92.2 ab 3512.1 b 3665.5 b
S3 101.6 e 17.2 b 3.30 c 5.74 e 82.1 ab 2085.7 d 2122.5 c 92.8 d 18.1 b 3.30 d 5.56 c 86.7 c 2151.7 d 2246.7 d
CV1 (%) 14.84 5.91 4.00 23.41 9.75 12.52 15.69 15.29 4.86 3.83 20.47 3.51 19.69 19.90
DD199 S1 125.9 c 17.2 b 4.20 a 9.06 b 74.1 c 2674.7 b 3017.2 ab 129.6 b 19.5 a 3.60 ab 9.08 a 96.7 a 3451.8 b 3947.5 ab
S2 112.0 d 16.7 b 4.10 a 7.63 d 81.9 b 2503.6 c 2810.5 b 138.7 a 20.3 a 3.52 b 9.91 a 96.0 a 3814.3 a 4277.5 a
S3 92.0 f 16.4 b 3.97 a 5.92 e 87.1 a 2196.4 d 2320.5 c 113.0 c 19.1 ab 3.43 cd 7.41 b 91.2 bc 2975.7 c 3038.2 c
CV2 (%) 12.67 1.82 2.70 16.99 6.56 8.05 10.76 8.36 2.54 1.98 11.79 2.59 10.06 13.96
氮肥 Nitrogen XZY518 N1 96.3 c 17.6 b 3.63 b 6.15 e 88.0 b 2203.3 d 2433.8 c 93.5 e 18.3 d 3.60 a 6.15 d 94.7 a 2593.1 e 2667.3 e
N2 134.0 b 17.9 b 3.57 b 8.57 c 80.9 cd 2766.9 b 3122.8 b 130.9 c 19.9 bc 3.44 c 8.97 b 94.0 a 3789.9 c 3795.3 c
N3 158.5 a 20.3 a 3.50 b 11.20 a 73.7 d 3248.6 a 3708.3 a 159.1 b 21.8 a 3.35 d 11.60 a 86.0 b 4457.6 a 4492.9 b
CV1 (%) 19.72 6.63 1.93 23.93 7.19 15.59 16.87 21.04 7.24 3.01 25.05 4.65 21.35 20.60
DD199 N1 85.4 d 17.3 b 4.13 a 6.10 e 94.6 a 2384.5 c 2594.9 c 104.7 d 18.9 d 3.59 a 7.09 c 94.3 a 2852.9 d 2901.5 d
N2 105.9 c 17.5 b 4.07 a 7.55 d 89.0 b 2670.3 b 3023.4 b 135.9 c 19.1 cd 3.49 b 9.04 b 94.0 a 3633.4 c 3820.8 c
N3 136.3 b 18.3 b 4.03 a 10.10 b 81.7 c 3121.2 a 3694.9 a 172.6 a 20.2 b 3.42 c 11.90 a 86.8 b 4264.3 b 4814.1 a
CV2 (%) 19.16 2.59 1.04 20.73 5.94 11.13 14.58 20.16 3.01 1.94 21.31 3.68 16.11 20.31
密度 Density XZY518 D1 234.2 a 19.4 a 3.73 c 16.90 a 91.2 a 2004.0 c 2313.9 c 286.8 b 19.6 a 3.54 ab 19.90 b 98.0 a 2737.1 d 2823.3 d
D3 111.6 c 18.2 bc 3.60 d 7.34 c 79.8 b 2569.0 b 2627.8 b 153.2 c 18.7 b 3.45 b 9.87 c 90.9 b 4006.0 b 3951.0 b
D5 90.0 d 17.9 bc 3.53 d 5.65 d 59.2 c 2467.9 b 2506.1 bc 84.6 e 17.7 c 3.30 c 4.94 e 89.0 b 3203.2 c 3284.4 c
CV1 (%) 43.71 3.48 2.48 49.27 17.23 10.48 5.21 48.01 4.19 2.86 53.82 4.37 15.81 13.81
DD199 D1 173.9 b 19.0 ab 4.37 a 14.37 b 93.0 a 1932.3 c 2004.1 d 309.4 a 19.6 a 3.63 a 22.00 a 98.0 a 2818.5 d 3250.0 c
D3 93.3 d 18.4 b 4.27 ab 7.32 c 81.1 b 2526.8 b 2670.8 b 162.7 c 18.8 b 3.54 ab 10.80 c 97.0 a 4199.7 ab 4713.1 a
D5 74.9 e 17.8 c 4.23 b 5.66 d 77.4 b 3133.0 a 3283.1 a 113.2 d 18.1 bc 3.45 b 7.05 d 92.4 b 4468.9 a 4901.1 a
CV2 (%) 37.68 2.59 1.13 42.08 7.96 19.37 19.69 42.70 3.42 2.02 47.88 2.64 18.88 17.21
Total CV1(%) 31.11 5.54 3.20 37.84 12.38 14.79 16.92 43.72 6.30 3.33 46.93 4.08 21.74 20.56
Total CV2(%) 39.97 4.49 2.87 31.53 7.76 14.37 16.89 38.59 3.40 2.07 41.72 3.52 16.48 18.38

图2

关键栽培措施对油菜叶面积指数的影响 处理同表1。XZY 518为湘杂油 518, DD 199为大地199。SS、BS、FS、MS分别表示苗期、薹期、花期、角果期。*、**分别表示在0.05和0.01概率水平显著差异, NS表示差异不显著。"

表4

关键栽培措施下油菜各生育期叶面积指数的变异系数分析"

栽培措施
Cultural
measures		 变异系数
Coefficient of
variations		 武汉Wuhan (2020-2021) 兰州Lanzhou (2021)
苗期
SS		 薹期
BS		 花期
FS		 苗期
SS		 薹期
BS		 花期
FS
播期Sowing date CV1 (%) 25.7 19.1 16.4 12.3 11.3 14.9
CV2 (%) 23.0 12.9 13.9 6.6 3.6 12.0
氮肥 Nitrogen CV1 (%) 38.2 38.7 37.6 19.7 20.4 24.1
CV2 (%) 25.3 24.6 30.2 13.1 12.9 12.8
密度 Density CV1 (%) 33.1 35.4 34.7 18.9 18.6 8.5
CV2 (%) 31.6 33.7 33.3 16.6 17.5 14.9
Total CV1 (%) 36.1 34.8 33.6 17.6 17.7 17.3
Total CV2 (%) 27.0 25.2 27.3 14.3 13.3 16.0

表5

栽培措施对油菜光能利用率的影响"

栽培措施 Cultivation Measures 品种
Variety		 处理
Treatment		 武汉Wuhan (2020-2021) 兰州Lanzhou (2021)
播种-
苗期
Sowing-
seedling		 苗期-
薹期
Seedling-
bolting		 薹期-
花期
Bolting-
flowering		 花期-
角果期
Flowering-
maturity		 全生
育期
Whole
growth		 播种-
苗期
Sowing-
seedling		 苗期-
薹期
Seedling-
bolting		 薹期-
花期
Bolting-
flowering		 花期-
角果期
Flowering-
maturity		 全生
育期
Whole growth
播期
Sowing date		 XZY
518		 S1 0.77 a 0.78 a 2.83 a 5.25 a 2.26 a 0.44 b 0.53 bc 0.83 c 1.25 a 0.76 c
S2 0.72 b 0.18 cd 2.14 bc 2.78 b 1.44 b 0.58 a 0.78 a 2.22 ab 1.17 a 1.19 a
S3 0.22 f 0.12 d 1.24 d 1.65 d 0.98 e 0.29 c 0.42 c 1.47 bc 0.56 b 0.69 c
CV1 (%) 43.57 82.78 31.45 46.59 33.94 27.12 26.12 37.70 31.02 25.12
DD
199		 S1 0.65 c 0.67 a 2.36 b 2.28 c 1.41 b 0.38 bc 0.56 abc 2.16 ab 0.61 b 0.93 b
S2 0.53 d 0.35 b 2.17 bc 2.12 c 1.24 c 0.35 bc 0.72 ab 2.87 a 0.88 ab 1.20 a
S3 0.29 e 0.34 bc 1.98 c 1.17 e 1.07 d 0.28 c 0.52 bc 1.39 c 0.45 b 0.66 c
CV2 (%) 30.45 33.81 7.15 26.39 11.19 12.45 14.40 28.24 27.44 23.70
氮肥
Nitrogen		 XZY
518		 N1 0.29 d 0.33 c 1.30 c 1.37 c 0.82 d 0.23 d 0.47 d 1.22 e 0.15 e 0.52 d
N2 0.58 b 0.42 bc 1.92 b 2.36 b 1.32 b 0.44 b 0.58 cd 1.80 c 0.58 cd 0.85 c
N3 0.81 a 0.50 ab 2.97 a 4.83 a 2.28 a 0.52 a 0.88 bc 2.35 a 0.84 b 1.15 b
CV1 (%) 37.99 26.67 33.41 50.99 41.12 30.83 26.93 25.78 54.37 30.63
栽培措施 Cultivation Measures 品种
Variety		 处理
Treatment		 武汉Wuhan (2020-2021) 兰州Lanzhou (2021)
播种-
苗期
Sowing-
seedling		 苗期-
薹期
Seedling-
bolting		 薹期-
花期
Bolting-
flowering		 花期-
角果期
Flowering-
maturity		 全生
育期
Whole
growth		 播种-
苗期
Sowing-
seedling		 苗期-
薹期
Seedling-
bolting		 薹期-
花期
Bolting-
flowering		 花期-
角果期
Flowering-
maturity		 全生
育期
Whole growth
氮肥
Nitrogen		 DD
199		 N1 0.30 d 0.39 c 1.21 c 0.85 d 0.69 e 0.22 d 0.94 b 1.47 d 0.41 d 0.76 c
N2 0.40 c 0.48 ab 1.76 b 1.18 c 0.96 c 0.32 c 1.25 a 2.15 b 0.66 bc 1.10 b
N3 0.61 b 0.55 a 2.79 a 1.47 c 1.36 b 0.44 b 1.37 a 2.51 a 1.20 a 1.38 a
CV2 (%) 29.58 13.84 34.11 21.71 27.43 27.53 15.27 21.10 43.57 23.47
密度
Density		 XZY
518		 D1 0.31 f 0.14 d 1.30 de 1.68 cd 0.86 e 0.12 c 0.18 d 1.45 d 0.27 b 0.61 c
D3 0.86 a 0.55 b 2.93 a 2.77 a 1.78 a 0.29 a 0.45 c 2.81 a 1.08 c 1.22 a
D5 0.66 c 0.46 b 2.28 b 2.04 bc 1.36 c 0.21 b 0.25 d 2.75 ab 0.60 d 0.95 b
CV1 (%) 37.26 45.90 30.87 20.96 28.20 33.60 39.00 26.85 51.16 26.93
DD
199		 D1 0.37 e 0.25 c 1.02 e 1.52 d 0.79 e 0.12 c 0.41 c 1.63 d 0.49 a 0.65 c
D3 0.50 d 0.53 b 1.56 cd 2.27 b 1.21 d 0.17 b 0.58 b 2.26 c 1.08 b 0.93 b
D5 0.77 b 0.66 a 1.72 c 3.04 a 1.55 b 0.19 b 0.76 a 2.56 b 1.50 cd 1.15 a
CV2 (%) 30.48 35.64 20.89 27.26 26.27 18.40 24.50 18.03 40.48 22.48
Total CV1 (%) 39.82 53.04 31.98 47.75 35.81 42.13 42.03 34.86 50.86 27.85
Total CV2 (%) 31.74 29.51 28.45 37.51 23.83 36.68 39.82 23.02 44.39 24.60

图3

关键栽培措施对油菜各生育时期干物累积量及根冠比的影响 处理同表1。XZY 518为湘杂油 518, DD 199为大地199。图中同一行不同字母表示在0.05概率水平差异显著, 差异显著性比较是在单因素的6个处理间进行的, 图中圆圈表示3个梯度间的变异系数。*和**表示在0.05和0.01概率水平显著差异, NS表示差异不显著。"

表6

关键栽培措施对花期油菜根系形态的影响"

栽培措施 Cultivation measures 品种Variety 处理
Treatment		 武汉 Wuhan (2020-2021) 兰州 Lanzhou (2021)
总根长
Total root length (cm)		 根表面积
Root surface area (cm2)		 根体积Root volume
(cm3)		 平均根直径Average root diameter (mm) 总根长
Total root length (cm)		 根表面积
Root surface area (cm2)		 根体积 Root volume
(cm3)		 平均根直径Average root diameter
(mm)
播期
Sowing date		 XZY518 S1 2332.5 a 1148.1 ab 165.1 ab 2.21 a 280.5 ab 249.3 bc 58.3 bc 1.53 c
S2 2069.1 b 724.2 c 92.9 bc 1.67 c 309.0 a 321.2 a 119.4 a 2.06 a
S3 802.6 d 389.6 d 39.3 c 1.10 f 179.2 d 217.0 c 44.2 c 1.08 e
CV1 (%) 38.50 41.17 52.01 27.41 21.74 16.59 44.13 25.79
DD199 S1 2334.7 a 1296.1 a 229.7 a 1.95 b 234.1 c 224.3 c 52.9 c 1.65 c
S2 2114.9 b 1077.7 d 167.6 ab 1.48 d 275.0 b 311.3 ab 81.0 b 1.89 b
S3 1339.1 c 788.9 c 139.3 b 1.33 e 229.4 c 237.6 c 42.0 c 1.30 d
CV2 (%) 22.13 19.70 21.11 16.66 8.32 14.85 28.02 14.96
氮肥
Nitrogen		 XZY518 N1 1233.1 d 371.3 e 35.9 d 1.20 c 181.9 d 205.4 c 35.4 d 2.41 a
N2 1952.3 b 676.0 c 89.8 c 1.32 c 289.0 b 234.6 c 51.2 c 1.71 b
N3 2383.6 a 905.0 b 142.9 b 2.17 a 359.8 a 371.2 ab 82.1 a 0.94 d
CV1 (%) 25.56 33.59 48.79 27.61 26.41 26.73 34.49 35.78
DD199 N1 1487.1 c 535.6 d 79.4 c 1.20 c 205.7 cd 227.2 c 36.3 d 2.22 a
N2 1707.1 bc 753.8 c 118.9 b 1.67 b 240.0 c 319.0 b 68.0 b 1.69 b
N3 2371.2 a 1048.2 a 191.9 a 2.21 a 312.8 b 410.7 a 86.5 a 1.20 c
CV2 (%) 20.26 26.96 35.83 24.17 17.71 23.49 32.59 24.23
密度
Density		 XZY518 D1 3772.5 a 1399.9 a 270.5 a 2.60 a 530.9 a 639.6 a 190.2 a 1.06 e
D3 1896.7 c 724.2 bc 124.2 b 1.53 b 309.0 c 266.1 cd 54.6 cd 1.45 d
D5 1088.3 d 433.3 cd 46.1 c 1.22 b 235.4 d 211.7 d 36.4 d 2.48 a
CV1 (%) 49.91 47.50 49.57 33.05 35.04 51.06 73.20 25.89
DD199 D1 2983.3 b 1346.6 a 255.8 a 2.66 a 460.1 b 521.4 b 157.4 b 1.13 e
D3 2602.0 b 950.0 b 135.0 b 1.63 b 285.0 c 331.1 c 81.0 c 1.60 c
D5 1506.9 c 347.7 d 54.8 c 1.25 b 219.6 d 223.1 d 44.3 d 1.94 b
CV2 (%) 26.47 46.59 42.51 32.22 31.57 34.39 49.99 21.27
Total CV1 (%) 42.77 43.97 63.44 30.28 33.69 43.13 64.03 33.32
Total CV2 (%) 26.22 34.63 40.84 26.76 26.87 30.68 48.42 20.98

表7

产量与各影响因子的灰色关联度分析"

评价项
Evaluation item		 XZY518 DD199
关联度
Correlation
degree		 排名
Ranking		 关联度
Correlation
degree		 排名
Ranking
千粒重1000-seed weight 0.844 7 0.777 10
群体角果数Population pod number 0.935 1 0.945 1
每角果粒数Seeds per pod 0.875 3 0.848 7
成株率Survival rate 0.810 13 0.808 9
总根长Total root length 0.571 19 0.496 19
根表面积Root surface area 0.699 17 0.592 18
根体积Root volume 0.768 15 0.656 16
平均根直径Average root diameter 0.853 6 0.888 3
苗期干重Dry weight at seedling stage 0.832 9 0.769 13
薹期干重Dry weight at bolting stage 0.816 11 0.740 14
花期干重Dry weight at flowering stage 0.907 2 0.891 2
成熟期干重Dry weight at maturity stage 0.832 8 0.832 8
苗期叶面积指数 LAI at seedling stage 0.815 12 0.769 12
薹期叶面积指数 LAI at bolting stage 0.861 4 0.862 4
花期叶面积指数LAI at flowering stage 0.859 5 0.856 5
播种-苗期光能利用效率 LUE at sowing-seedling stage 0.734 16 0.688 15
苗-薹期光能利用效率LUE at seedling-bolting stage 0.787 14 0.776 11
薹-花期光能利用效率LUE at bolting-flowering stage 0.824 10 0.855 6
花-角果期光能利用效率LUE at flowering-maturity stage 0.632 18 0.643 17

表8

产量与主要影响因子的相关性分析"

指标
Index		 产量Yield
XZY518 DD199
群体角果数Population pod number 0.932** 0.968**
每角果粒数Seeds per pod 0.672** 0.688**
平均根直径Average root diameter 0.632** 0.775**
花期干重Dry weight at flowering stage 0.928** 0.906**
成熟期干重Dry weight at maturity stage 0.499* 0.518*
薹期叶面积指数 LAI at bolting stage 0.504* 0.689**
花期叶面积指数LAI at flowering stage 0.560* 0.696**
薹-花期光能利用效率LUE at bolting-flowering stage 0.639** 0.606**

表9

产量变异系数与主要影响因子变异系数的相关性分析"

指标
Index		 产量Yield
XZY518 DD199
群体角果数Population pod number 0.952** 0.987**
每角果粒数Seeds per pod 0.587 0.968**
平均根直径Average root diameter 0.924** 0.865*
花期干重Dry weight at flowering stage 0.993** 0.927**
成熟期干重Dry weight at maturity stage 0.884* 0.420
薹期叶面积指数 LAI at bolting stage -0.530 0.552
花期叶面积指数LAI at flowering stage -0.289 0.303
薹-花期光能利用效率LUE at bolting-flowering stage 0.181 0.583
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