Crops ›› 2021, Vol. 37 ›› Issue (5): 146-152.doi: 10.16035/j.issn.1001-7283.2021.05.022

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Correlation and Path Analysis of Oat Seed Yield with Agronomic Characters in Jiang-Huai Area

Zhang Qi(), Wei Zhenwu(), Yan Tianfang   

  1. College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, Jiangsu, China
  • Received:2020-09-24 Revised:2021-01-22 Online:2021-10-15 Published:2021-10-14
  • Contact: Wei Zhenwu E-mail:zqimaster@126.com;zhenwuwei@foxmail.com

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Abstract:

To discuss the factors influencing oat seed yield in Jiang-Huai area, correlation and path analysis were carried out on the seed yields of 12 main agronomic characters of 13 germplasms of hulled oat (Avena sativa) and seven germplasms of naked oat. The results showed that the correlation between 12 agronomic characters and seed yield of hulled oat was number of tiller > stem and leaf ratio > plant height > stem thick > 1000-grain weight > length of spikelet > width of flag leaf > number of ear layer > number of flower > ear fresh weight > length of flag leaf > number of spikelet. Six traits were selected by screening with the stepwise regression method. Path analysis of oats seed yield with the six main agronomic characters was carried out. The direct effect order was stem thick > number of tiller > stem and leaf ratio > length of spikelet > plant height >1000-grain weight, while the plant height and 1000-grain weight showed negative effects. The correlation between agronomic characters and seed yield of naked oat was number of flower > length of flag leaf > number of spikelet > stem thick > length of spikelet > number of tiller > ear fresh weight > plant height > number of ear layer > width of flag leaf > stem and leaf ratio > 1000-grain weight. Path analysis of seed yield of naked oat with the seven main agronomic characters was carried out. The direct effect order was ear fresh weight > length of spikelet > stem thick > number of spikelet > number of flower > length of flag leaf > number of tiller, while the length of flag leaf and number of tiller showed negative effects. With comprehensive consideration, the key to high yield of hulled oat seed in Yangzhou area was to increase tiller number per plant. During the production of naked oat, the cultivars with good spikelets and moderate florets number should be selected.

Key words: Oat, Germplasm, Agronomic characters, Seed yield, Path analysis

Table 1

Name and origin of tested oat"

编号
Code		 种质名称
Name of germplasm		 来源
Origin		 皮/裸
Hulled/naked		 编号
Code		 种质名称
Name of germplasm		 来源
Origin		 皮/裸
Hulled/naked
S1 淮燕1号 扬州 皮 S11 淮燕3号 扬州 皮
S2 淮燕2号 扬州 皮 S12 青海444 青海 皮
S3 杂叶307 扬州 皮 S13 EMS 444 扬州 皮
S4 牧乐思 北京 皮 N1 淮选6号 扬州 裸
S5 AS1722608 扬州 皮 N2 白燕2号 吉林 裸
S6 GZ-2 甘肃 皮 N3 白燕8号 吉林 裸
S7 ASP1509012 扬州 皮 N4 青燕3号 青海 裸
S8 AS1722637 山东 皮 N5 ASP1413 扬州 裸
S9 AS1722720 山东 皮 N6 ASP13012 扬州 裸
S10 AS1722719 北京 皮 N7 AS1408 扬州 裸

Table 2

The change of yield and its components of different oats"

编号
Code		 株高
Plant
height
(cm)		 茎粗
Stem
thick
(cm)		 旗叶长
Flag leaf length
(cm)		 旗叶宽
Flag leaf width
(cm)		 分蘖数
Number
of tillers		 穗长
Spikelet length
(cm)		 小穗数
Number of spikelets		 穗鲜重
Ear fresh weight
(g)		 茎叶比
Ratio of stem to
leaf		 千粒重
1000-grain weight (g)		 籽粒产量
Seed yield
(t/hm2)
S1 139.76cdef 0.84ab 46.06bcd 3.05a 4.00bc 36.44cde 114.50a 6.87f 1.32i 42.67ab 4.45e
S2 130.20fgh 0.52defg 32.38h 1.78efg 5.60ab 28.10g 69.71abc 5.40g 3.97b 44.00a 5.40bc
S3 135.20efg 0.59cdefg 42.90de 2.00efg 4.17bc 35.70cdef 80.17abc 5.22g 3.60b 32.00d 6.36a
S4 136.20defg 0.60cdefg 50.00abc 2.67abc 3.80bc 40.49bc 89.00ab 3.15h 1.58hi 34.33d 5.38c
S5 158.80b 0.64cdef 44.70cd 2.94ab 1.80d 39.70bc 82.00abc 8.08cd 1.95fgh 31.67d 4.57e
S6 129.30fg 0.52efg 39.70defg 2.49bcd 5.60ab 31.37efg 107.40a 7.99cd 1.75gh 26.33e 5.29cd
S7 127.46fgh 0.62cdef 43.04de 1.96efg 3.80bc 30.03fg 70.17abc 7.59de 2.47de 39.00c 4.97e
S8 137.70defg 0.64cdef 53.90a 3.02a 4.60bc 28.18g 80.60abc 5.35g 3.06c 39.67bc 5.26cd
S9 142.50cde 0.61cdef 45.30bcd 2.25cde 4.60bc 44.59b 108.50a 5.32g 2.18ef 43.33a 4.37e
S10 158.50b 0.69bc 51.09ab 2.83ab 3.60c 40.41bc 81.17abc 5.31g 1.58hi 39.67bc 4.47e
S11 148.10bcd 0.63cdef 44.00cd 2.61abcd 3.83bc 32.31defg 93.60ab 8.35c 2.52de 39.67bc 5.52bc
S12 143.90cde 0.66cde 41.70def 2.56abcd 4.00bc 31.20efg 113.67a 9.97a 1.71gh 38.00c 5.73b
S13 142.90cde 0.60cdef 34.75gh 2.12def 2.80cd 28.27g 77.00abc 6.74f 2.59d 37.67c 3.80f
N1 132.80efg 0.71bc 49.90abc 1.93efg 3.67c 36.20cde 96.83ab 8.16cd 4.36a 21.00fg 2.12g
N2 133.15efg 0.66cde 50.99ab 2.12def 4.60bc 32.38defg 74.67abc 9.83a 2.30def 23.67ef 2.15g
N3 120.00h 0.48fg 36.40fgh 1.59g 4.60bc 28.97g 79.00abc 9.02b 3.79b 17.00h 2.06gh
N4 126.30gh 0.58cdefg 37.00efgh 2.20cde 4.00bc 27.05g 59.83bc 7.26ef 3.14c 20.00gh 1.41i
N5 182.70a 0.68cd 42.30def 2.23cde 4.17bc 37.62cd 58.00bc 7.06ef 2.97c 23.67ef 2.04gh
N6 128.20fgh 0.44g 43.30de 1.70fg 3.20cd 36.37cde 42.00c 6.61f 2.60d 20.33fgh 1.76h
N7 151.62bc 0.87a 52.74a 2.57abcd 6.60a 55.29a 96.33ab 7.13ef 2.06fg 17.00h 2.20g

Table 3

Correlation of seed yield components and other related characters of hulled oat"

性状
Trait		 株高
Plant height
(X1)		 茎粗
Stem
thick
(X2)		 旗叶长
Flag leaf length
(X3)		 旗叶宽
Flag leaf width
(X4)		 分蘖数
Number
of tillers
(X5)		 穗长
Spikelet length
(X6)		 小穗数
Number of spikelets
(X7)		 小花数
Number
of flowers
(X8)		 轮层数
Number of ear layers
(X9)		 穗鲜重
Ear fresh weight
(X10)		 茎叶比
Ratio of stem to leaf
(X11)		 千粒重
1000-grain weight
(X12)		 籽粒产量
Seed
yield
(Y)
X1 1.000 0.409 0.339 0.555* -0.690* 0.486 0.076 0.020 0.232 0.165 -0.387 0.055 -0.381
X2 1.000 0.477 0.643* -0.375 0.281 0.394 -0.233 -0.113 0.132 -0.540 0.381 -0.331
X3 1.000 0.727** -0.179 0.477 0.140 0.127 -0.323 -0.326 -0.410 0.017 0.020
X4 1.000 -0.322 0.312 0.414 -0.071 -0.251 0.086 -0.642* -0.087 -0.198
X5 1.000 -0.281 0.201 0.202 -0.533 -0.187 0.319 0.129 0.422
X6 1.000 0.317 0.067 -0.025 -0.361 -0.492 -0.025 -0.215
X7 1.000 -0.040 -0.369 0.353 -0.633* -0.040 -0.006
X8 1.000 -0.369 -0.305 0.154 -0.205 -0.166
X9 1.000 0.028 0.127 -0.188 0.181
X10 1.000 -0.231 -0.160 0.020
X11 1.000 0.178 0.395
X12 1.000 -0.298
Y 1.000

Table 4

Correlation of seed yield components and other related characters of naked oat"

性状
Trait		 株高
Plant height
(X1)		 茎粗
Stem
thick
(X2)		 旗叶长
Flag leaf length
(X3)		 旗叶宽
Flag leaf width
(X4)		 分蘖数
Number
of tillers
(X5)		 穗长
Spikelet length
(X6)		 小穗数
Number of spikelets
(X7)		 小花数
Number
of flowers
(X8)		 轮层数
Number of ear layers
(X9)		 穗鲜重
Ear fresh weight
(X10)		 茎叶比
Ratio of stem to leaf
(X11)		 千粒重
1000-grain weight
(X12)		 籽粒产量
Seed
yield
(Y)
X1 1.000 0.533 0.230 0.584 0.251 0.481 -0.049 -0.048 0.681 -0.382 -0.284 0.417 0.320
X2 1.000 0.736* 0.861* 0.714 0.742 0.694 -0.228 0.435 -0.037 -0.263 0.015 0.527
X3 1.000 0.499 0.432 0.690 0.553 -0.334 0.032 0.142 -0.363 0.181 0.659
X4 1.000 0.670 0.630 0.310 0.106 0.374 -0.254 -0.550 0.091 0.131
X5 1.000 0.708 0.610 -0.122 -0.018 0.094 -0.489 -0.472 0.494
X6 1.000 0.430 0.151 -0.077 -0.390 -0.491 -0.292 0.524
X7 1.000 -0.521 0.183 0.407 0.251 -0.362 0.652
X8 1.000 -0.445 -0.864* -0.264 -0.337 -0.722*
X9 1.000 0.093 0.290 0.568 0.210
X10 1.000 0.184 0.148 0.438
X11 1.000 -0.081 -0.045
X12 1.000 0.012
Y 1.000

Table 5

The normal test output of seed yield"

燕麦类型
Oat type		 Kolmogorov-Smirnov非参数检验
Kolmogorov-Smirnov nonparametric test		 Shapiro-Wilk检验
Shapiro-Wilk test
统计量Statistic 自由度Degrees of freedom 显著水平Sig. 统计量Statistic 自由度Degrees of freedom 显著水平Sig.
皮燕麦Hulled oat 0.107 39 0.200* 0.983 39 0.812
裸燕麦Naked oat 0.104 18 0.200* 0.978 18 0.933

Table 6

Path-coefficient analysis between seed yield and its components of hulled oat"

性状
Trait		 相关系数
Correlation coefficient		 直接通径系数
Direct path coefficient		 间接通径系数Indirect path coefficient
X1→Y X2→Y X5→Y X6→Y X11→Y X12→Y
X1 -0.381 -0.265 -0.108 0.183 -0.129 0.103 -0.015
X2 -0.331 0.790 0.323 -0.296 0.222 -0.427 0.301
X5 0.422 0.656 -0.453 -0.246 -0.184 0.209 0.085
X6 -0.215 0.136 0.066 0.038 -0.038 -0.067 -0.003
X11 0.395 0.635 -0.246 -0.343 0.203 -0.312 0.113
X12 -0.298 -0.706 -0.039 -0.269 -0.091 0.018 -0.126

Table 7

Path-coefficients analysis between seed yield and its components of naked oat"

性状
Trait		 相关系数
Correlation coefficient		 直接通径系数
Direct path coefficient		 间接通径系数Indirect path coefficient
X2→Y X3→Y X5→Y X6→Y X7→Y X8→Y X10→Y
X2 0.527 0.402 0.296 0.376 0.298 0.279 -0.092 -0.015
X3 0.659 -0.167 -0.123 -0.072 0.455 -0.092 0.056 -0.024
X5 0.494 -0.465 -0.332 -0.201 -0.329 -0.284 0.057 -0.044
X6 0.524 0.499 0.370 0.344 0.353 0.215 0.075 -0.195
X7 0.625 0.211 0.146 0.117 0.129 0.091 -0.110 0.086
X8 -0.722 0.201 0.165 -0.046 -0.025 0.030 -0.105 -0.174
X10 0.438 0.858 -0.032 -0.032 0.081 -0.335 0.349 -0.741
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