Rapeseed population arrangement defined by adaptability and stability parameters

Krüger, Cleusa A. M. B.; Medeiros, Sandro L. P.; Silva, José A. G. da; Dalmago, Genei A.; Valentini, Ana P. F.; Wagner, Juliano F.

doi:10.1590/1807-1929/agriambi.v20n1p36-41

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SOIL, WATER AND PLANT MANAGEMENT • Rev. bras. eng. agríc. ambient. 20 (1) • Jan 2016 • https://doi.org/10.1590/1807-1929/agriambi.v20n1p36-41 copy

Rapeseed population arrangement defined by adaptability and stability parameters

Arranjo populacional em canola definido pelos parâmetros de adaptabilidade e estabilidade

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The objective of this study was to identify the plant arrangement that allows greater grain yield with adaptability and stability of rapeseed hybrids. The experiments were conducted in randomized block design with four replicates and the 12 treatments consisted of combination of inter-row spacings (0.20, 0.40, and 0.60 m) and plant densities (20, 40, 60 and 80 plants m^-2). The hybrids Hyola 432 (early cycle) and Hyola 61 (medium cycle) were cultivated in three growing seasons (2008, 2009 and 2010). Grain yield was evaluated based on the parameters adaptability and stability according to the models of Wricke and Eberhart & Russell. The plant arrangement for obtaining higher grain yield depends on the cultivated genotype. Higher grain yield was obtained in the arrangements of 0.20 m x 60 and 0.40 m x 60 plants m^-2 for Hyola 432, and in 0.20 m x 60 plants m^-2 for Hyola 61, in the three years of evaluation. In the inter-row spacing of 0.40 m and densities of 40 and 60 plants m^-2, Hyola 432 shows high yield, adaptability to wide environments and stability. For Hyola 61, high productivity with overall adaptability was obtained in the inter-row spacing of 0.40 m, with 60 plants m^-2.

Key words:
Brassica napus L.; inter-row spacing; plant density; grain yield

Variation source	DF	Mean square Grain yield (kg ha^-1)
Variation source	DF	Hyola 432	Hyola 61
Block	3	3,782	68
Plant arrangement (PA)	11	403,869 ^* * Significant at 0.05 probability level by F test; DF - Degrees of freedom	179,073 ^* * Significant at 0.05 probability level by F test; DF - Degrees of freedom
Cultivation years (CY)	2	3,867,841 ^* * Significant at 0.05 probability level by F test; DF - Degrees of freedom	849,428 ^* * Significant at 0.05 probability level by F test; DF - Degrees of freedom
PA x CY	22	69,256 ^* * Significant at 0.05 probability level by F test; DF - Degrees of freedom	105,760 ^* * Significant at 0.05 probability level by F test; DF - Degrees of freedom
Error	105	5,408	5,562
Total	143	-	-
Overall mean		983	876
CV (%)	-	7	8

Plant arrangement (plants m^-2)	Years/Grain yield			Overall
Plant arrangement (plants m^-2)	2008	2009	2010	Mean
Hyola 432 (early cycle)
0.20 m x 20	756 Bc	1164 Ae	609 Cd	843
0.20 m x 40	896 Bb	1226 Ae	717 Cc	946
0.20 m x 60	1143 Ba	1918 Aa	877 Cb	1313	S
0.20 m x 80	973 Bb	1516 Ac	890 Bb	1126
0.40 m x 20	925 Bb	1199 Ae	716 Cc	947
0.40 m x 40	953 Bb	1361 Ad	890 Bb	1068
0.40 m x 60	1129 Ba	1713 Ab	1022 Ca	1288	S
0.40 m x 80	902 Bb	1312 Ad	753 Cc	989
0.60 m x 20	747 Bc	1021 Af	433 Ce	733	I
0.60 m x 40	918 Ab	975 Ag	661 Bc	851
0.60 m x 60	985 Ab	1084 Af	575 Bd	881
0.60 m x 80	990 Ab	934 Ag	520 Bd	815
Mean	943 B	1285 A	722 C
Hyola 61(medium cycle)
0.20 m x 20	624 Cc	966 Ac	791 Be	793
0.20 m x 20	585 Cc	1381 Aa	1007 Bc	991
0.20 m x 40	769 Cb	1238 Ab	1103 Bb	1037	S
0.20 m x 60	663 Bb	1039 Ac	1111 Ab	937
0.20 m x 80	586 Cc	962 Ac	733 Be	760
0.40 m x 20	1000 Aa	1020 Ac	965 Ac	995
0.40 m x 40	907 Ba	881 Bd	1191 Aa	993
0.40 m x 60	713 Bb	781 Be	1268 Aa	921
0.40 m x 80	677 Ab	692 Ae	553 Bf	641	I
0.60 m x 20	731 Bb	981 Ac	815 Be	842
0.60 m x 40	745 Bb	886 Ad	913 Ad	848
0.60 m x 60	676 Bb	716 Be	882 Ad	758
Mean	723 B	962 A	944 A

PA (plants m^-2)	MY (kg ha^-1)		Parameters
			Eberhart & Russell (1966)			Wricke (1965)
			β₁	σ²di	R²	ω_i	ω_i(%)
Hyola 432 (early cycle)
0.20 m x 20	843	d	1.00^ns ns Not significant by F test and t-test	1.973^ns ns Not significant by F test and t-test	97.9	13,304	0.8
0.20 m x 40	946	c	0.90^ns ns Not significant by F test and t-test	1049^ns ns Not significant by F test and t-test	99.7	6,551	0.4
0.20 m x 60	1313	a	1.88^* * Significant;	12095^* * Significant;	97.7	557,843	36.6
0.20 m x 80	1126	b	1.15^ns ns Not significant by F test and t-test	15997^* * Significant;	92.4	84,046	5.5
0.40 m x 20	947	c	0.85^ns ns Not significant by F test and t-test	1118^ns ns Not significant by F test and t-test	99.8	14,720	1.0
0.40 m x 40	1068	b	0.86^ns ns Not significant by F test and t-test	8376^* * Significant;	92.5	50,139	3.3
0.40 m x 60	1288	a	1.26^ns ns Not significant by F test and t-test	16364^* * Significant;	93.5	116,631	7.7
0.40 m x 80	989	c	1.00^ns ns Not significant by F test and t-test	1932^ns ns Not significant by F test and t-test	98.0	13,198	0.9
0.60 m x 20	733	d	1.02^ns ns Not significant by F test and t-test	3189^ns ns Not significant by F test and t-test	97.3	18,508	1.2
0.60 m x 40	851	d	0.52^* * Significant;	10518^* * Significant;	78.8	193,561	12.7
0.60 m x 60	881	d	0.85^ns ns Not significant by F test and t-test	27738^* * Significant;	80.0	130,860	8.6
0.60 m x 80	815	d	0.65^* * Significant;	60947^* * Significant;	52.8	324,273	21.3
Hyola 61 (medium cycle)
0.20 m x 20	793	b	1.14^ns ns Not significant by F test and t-test	10656^* * Significant;	79.4	51,192	2.2
0.20 m x 40	991	a	2.72^* * Significant;	51937^* * Significant;	83.1	635,990	27.3
0.20 m x 60	1037	a	1.77^* * Significant;	3973^ns ns Not significant by F test and t-test	95.4	106,179	4.6
0.20 m x 80	937	a	1.76^* * Significant;	3954^ns ns Not significant by F test and t-test	95.3	103,720	4.5
0.40 m x 20	760	b	1.18^ns ns Not significant by F test and t-test	20350^* * Significant;	69.7	92,018	4.0
0.40 m x 40	995	a	-0.02^* * Significant;	150^ns ns Not significant by F test and t-test	1.1	154,089	6.6
0.40 m x 60	993	a	0.48^ns ns Not significant by F test and t-test	49364^* * Significant;	14.0	240,823	10.4
0.40 m x 80	921	a	1.22^ns ns Not significant by F test and t-test	128308^* * Significant;	29.0	525,909	22.6
0.60 m x 20	641	c	0.20^ns ns Not significant by F test and t-test	8854^* * Significant;	12.3	245,545	10.6
0.60 m x 40	842	b	0.76^ns ns Not significant by F test and t-test	10227^* * Significant;	69.1	54,224	2.3
0.60 m x 60	848	b	0.66^ns ns Not significant by F test and t-test	624^ns ns Not significant by F test and t-test	95.3	19,088	0.8
0.60 m x 80	758	b	0.48^ns ns Not significant by F test and t-test	13829^* * Significant;	35.6	97,951	4.2

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[1] cleusa.bianchi@unijui.edu.br (Corresponding author)