Analysis of dormancy and physiological quality of <i>Stylosanthes</i> spp. stored in FGB-UEFS

Silva, Aritana Alves da; Pelacani, Claudineia Regina; Grilo, Josandra Souza Teles Fonseca; Pereira, Larissa de Souza; Oliveira, Ronaldo Simão de

doi:10.1590/0034-737X2024710012

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Vegetative and Seminiferous Propagation • Rev. Ceres 71 • 2024 • https://doi.org/10.1590/0034-737X2024710012 copy

Analysis of dormancy and physiological quality of Stylosanthes spp. stored in FGB-UEFS¹ 1 This work is part of the master dissertation of the first author and it received scholarship from CAPES.

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Knowledge on the viability of the seeds is important in the management of the Germplasm Bank, as it allows monitoring the longevity and the need for regeneration of the accessions. The objective was to validate the efficiency of the Gomez-Campo methodology for seed conservation by evaluating physical dormancy and physiological quality of 11 Stylosanthes spp. accessions stored between seven and 13 years in the Forage Germplasm Bank of the State University of Feira de Santana (FGB-UEFS). One-hundred seed were used to determine moisture degree (%) and the viability with the descriptors: percentage of germination (G), germination speed index (GSI), synchronicity (Z) and average germination time (AGT). Sowing was done in plates moistened with water, arranged under controlled conditions (BOD chambers: at 20/30 °C and 12 hours/light) and in a completely randomized design in a 2 x 11 factorial scheme (scarified/non-scarified seeds and 11 accessions). After 14 days, it was observed that most of the accessesion presented high G (greater than 70%), GSI less than 2 seeds.day^-1, Z with a mean value of 0,52 and AGT with a mean value of 2 days, characterizing a synchronous and rapid event. Thus, the methodology used in storage is efficient for the conservation of Stylosanthes seeds in the medium term.

Keywords
conservation; forage legume; germplasm bank

Species	Accession ¹ 1 In all accessions, the three numbers after the letter code (BGF) refer to the year of collection of the seeds and the others represent the passport data identified in the FGB-UEFS.	City	Coordinates	Altitude (m)
S. scabra	BGF 008-016	Queimadas	10°54’40’’/ 39°12’17’’	290
	BGF 014-P110	Ibotirama	12º10’595”/43º14’946”	419
	BGF 014-P130-1	Cristópolis	12º10’558”/44º32’259”	734
	BGF 014-P137-2	Seabra	12º27’311”/42º11’452”	939
S. humilis	BGF 012-014	Canarana	11º48’597”/41º42’066”	809
S. humilis	BGF 014-P115-2	Muquém do São Francisco	12º13’062”/43º52’018”	836
S. macrocephala	BGF 013-P051-2A	Feira de Santana	12º10’439”/39º01’738”	179
Stylosanthes sp.	BGF 014-P067-1A	Várzea Nova	11º11’942”/40º54’882”	701
	BGF 014-P118-1	Cristópolis	12º33’222”/44º26’433”	718
	BGF 014-P126-2	Luiz Eduardo Magalhães- BR-242	12º06’244”/45º53’530”	784
S. capitata/S. macrocephala^* 2 Cultivar Estilosantes Campo Grande: purchased in a shop and maintained in the same storage conditions since 2011.	BGF 011	Feira de Santana	-	-

Species	Accession	MD (%)
S. scabra	BGF 08*-016	6,07
	BGF 014-P110	4,54
	BGF 014-P130-1	4,53
	BGF 014-P137-2	5,49
S. humilis	BGF 012-014	4,73
S. humilis	BGF 014-P115-2	5,20
S. macrocephala	BGF 013-P051-2A	8,01
Stylosanthes sp	BGF 014-P067-1A	4,08
	BGF 014-P118-1	4,67
	BGF 014-P126-2	5,50
S. capitata/S. macrocephala¹ 1 Estilosantes Campo Grande cultivar: purchased from a shop and maintained in the same storage conditions since 2011.	BGF 011	4,41
Mean		5,21

Source of Variation	DF¹ 1 DF: Degrees of Freedom;	G² 2 G: Germination (%);	GSI³ 3 GSI: Germination Speed Index (seed/day);	Z⁴ 4 Z: Synchronicity;
Accessions	10	70,92**	2,44**	0,01**
Treatment	1	42318,32**	122,25**	0,009*
Accessions X Treatment	10	817,59**	2,39**	0,01**
Residue	66	43,61	0,14	0,001
CV⁵ 5 CV: Coefficient of Variation; (%)		13,63	13,05	20,41
Mean		56,00	8,43	0,52
W		0,911	0,905	0,980
F		5,801	7,173	4,706

ACESSIONS	S¹ 1 S: scarified;	NS² 2 NS: without scarification;	S	NS	S	NS
ACESSIONS	G³ 3 G: germination; (%)		GSI⁴ 4 GSI: germination speed index; (seeds day^-1)		Z⁵ 5 Z: synchronicity.
BGF 08-016	98,60 Aa	7,40 Bd	22,35 Aa	0,81 Bd	0,77 Aa	0,31 Bb
BGF 012-014	54,10 Ad	21,40 Bd	10,77 Ac	3,68 Bc	0,46 Ab	0,46 Ab
BGF 013-P051-2A	88,00 Ab	11,80 Bd	17,85 Ab	1,67 Bd	0,45 Ab	0,38 Ab
BGF 014-P067-1A	57,10Ad	12,60 Bd	6,98 Ad	1,12 Bd	0,35 Ab	0,28 Ab
BGF 014-P110	100,00 Aa	11,80 Bd	23,89 Aa	2,21 Bc	0,84 Aa	0,38 Bb
BGF 014-P115-2	96,50 Ab	52,10 Bb	21,34 Aa	9,73 Ba	0,70 Aa	0,47 Bb
BGF 014-P118-1	76,20 Ac	11,30 Bd	14,01 Ac	1,59 Bd	0,57 Ab	0,49 Ab
BGF 014-P126-2	95,60 Ab	33,70 Bc	16,30 Ab	5,27 Bb	0,44 Ab	0,45 Ab
BGF 014-P130-1	96,50 Ab	8,20 Bd	18,06 Ab	1,21 Bd	0,44 Bb	0,98 Aa
BGF 014-P137-2	91,50 Ac	5,30 Bd	21,60 Aa	1,29 Bd	0,83 Aa	0,98 Aa
BGF 011⁶ 6 Estilosantes Campo Grande cultivar: purchased in a shop and kept under the same storage conditions since 2011. Means followed by the same capital letter in the rows and small letters in the columns do not differ from each other, according to the Scott Knot test at 5% significance.	82,10 Ac	69,80 Aa	14,76 Ac	11,61 Aa	0,40 Ab	0,32 Ab

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[1] * Corresponding author: aritana.agronomia@gmail.com

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Analysis of dormancy and physiological quality of Stylosanthes spp. stored in FGB-UEFS1 1 This work is part of the master dissertation of the first author and it received scholarship from CAPES.

ABSTRACT

Analysis of dormancy and physiological quality of Stylosanthes spp. stored in FGB-UEFS¹ 1 This work is part of the master dissertation of the first author and it received scholarship from CAPES.