Rapeseed / Colza
Open Access

Table 4

Analysis of variance and comparison of main effects for oil yield, oil content and fatty acid composition of rapeseed cultivars under late-season thermal stress and selenium foliar application.

S.O.V df Oil yield (kg/ha) Oleic acid (%) Linolenic acid (%) Linoleic acid (%) Palmitic acid (%) Erucic acid (%) Glucosinolate (µmole/g)
Year (Y) 1 ** ** ** ** ** ** **
   2013–2014 1610 b 62.00 b 5.48 a 19.02 a 4.77 b 0.29 a 12.90 a
   2014–2015 1933 a 64.52 a 5.89 a 17.50 b 5.18 a 0.32 a 12.44 a
LSD 5% 250.25 0.06 1.08 0.42 0.11 0.07 2.68
Planting date (P) 2 ** ** ** ** ** ** **
   Oct. 7 2352 a 64.67 a 4.55 c 19.94 a 5.60 a 0.18 c 9.40 c
   Oct. 17 1771 b 63.35 b 5.68 b 18.23 b 5.10 b 0.30 b 12.70 b
   Oct. 27 1192 c 61.76 c 6.82 a 16.61 c 4.22 c 0.44 a 15.91 a
LSD 5% 103.19 0.43 0.12 0.40 2.22 0.01 0.32
Selenium (Se) 1 ** ** ** * ** ** **
   Control 1697 b 63.09 b 5.83 a 18.06 b 4.89 b 0.32 a 13.08 a
   Se application 1845 a 63.43 a 5.54 b 18.46 a 5.06 a 0.29 b 12.26 b
LSD 5% 84.25 0.32 0.10 0.33 0.15 0.01 0.26
Cultivar (C) 5 ** ** ** ** ** ** **
   Opera 1839 a 63.48 a 5.55 b 18.47 a 5.10 a 0.29 b 12.31 b
   L72 1923 a 63.67 a 5.37 c 18.67 a 5.14 a 0.27 c 11.85 c
   KR1 1667 b 63.02 b 5.89 a 17.97 b 4.87 b 0.33 a 13.27 a
   GKH3705 1670 b 63.00 b 5.89 a 17.98 b 4.85 b 0.33 a 13.22 a
   GKH0224 1624 b 62.84 b 5.98 a 17.85 b 4.77 b 0.34 a 13.45 a
   Neptune 1905 a 63.56 a 5.42 c 18.63 a 5.12 a 0.28 bc 11.93 c
LSD 5% 97.53 0.37 0.11 0.29 0.18 0.01 0.34
P × Y 2 ns ns ** * ** ns **
Y × Se 1 ns ns ns ns ns ns ns
Se × P 2 ns ns ns ns ns ns ns
Se × P × Y 2 ns ns ns ns ns ns ns
C × Y 5 ns ns ns ns ns ns ns
C × P 10 ** ** ns ** ** ns **
C × Se 5 ns ns ns ns ns ns ns
C × P × Y 10 ns ns ns ns ns ns ns
C × Se × Y 5 ns ns ns ns ns ns ns
C × Se × P 10 * ns * * * * *
C × Se × P × Y 10 ns ns ns ns ns ns ns
CV (%) 11.80 0.96 1.28 4.35 3.43 8.03 10.07

*: Significant at 5% level of probability; **: Significant at 1% level of probability; S.O.V.: Source of variation; df: Degree of freedom; CV: Coefficient of variation; Y: Year; R: Replication; P: Planting date; Se: Selenium; C: Cultivar.

a–c: Means followed by similar letters in each column are not significant at 0.05 probability level.

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