IDENTIFICATION OF SOURCES OF RESISTANCE TO <i>Meloidogyne enterolobii</i> IN ACEROLA<sup>1</sup>

SANTOS, JOHN LENNON FERRREIRA DOS; SOUZA, FLÁVIO DE FRANÇA; BOREL, JERÔNIMO CONSTANTINO; CASTRO, JOSÉ MAURO DA CUNHA E; CAPUCHO, ALEXANDRE SANDRI

doi:10.1590/1983-21252021v34n415rc

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Agronomy • Rev. Caatinga 34 (4) • Oct-Dec 2021 • https://doi.org/10.1590/1983-21252021v34n415rc copy

IDENTIFICATION OF SOURCES OF RESISTANCE TO Meloidogyne enterolobii IN ACEROLA¹

IDENTIFICAÇÃO DE FONTES DE RESISTÊNCIA A Meloidogyne enterolobii EM ACEROLEIRA

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

In Brazil, acerola trees infested by Meloidogyne enterolobii present lower yield and fruit quality. The use of rootstocks resistant to this pathogen is one of the alternatives to overcome this problem. This study aimed to assess the reaction of 22 acerola accessions to M. enterolobii, aiming to identify at least one resistant rootstock. The experiment was carried out in a randomized block design with 10 replications and each plot consisting of 10 plants. Each plant was inoculated with 350 eggs and second-stage juveniles of M. enterolobii, with the gall index (GI) and reproduction factor (RF) being determined after 90 days. The variables were analyzed using the mixed model methodology (REML/BLUP). The accessions ACO-13, ACO-14, ACO-18, and BRS Apodi stood out with four to six plants showing resistance reaction to the root-knot nematode, but the assessment of accessions should be performed under a higher density inoculum and longer time.

Keywords:
Malpighia emarginata ; Root-knot nematode; Rootstock

Estimate	Variable
Estimate	Gall index (GI)	Reproduction factor (RF)
${\overset{⌢}{h}}^{2}_{a}$	$0 .68 \pm 0. 10$	$0 .42 \pm 0. 08$
${\overset{⌢}{h}}^{2}_{mp}$	0.9274	0.8729
${\overset{⌢}{r}}_{gg}$	0.9630	0.9343
CV_gi%	27.7619	70.6529
CV_e%	12.2759	42.6162
Mean	77.3409	9.1181

Accession	Frequency of plants (%) based on GI^* *Plant frequency (%) based on GI.
Accession	0	1	2	3	4	5
ACO-18	1	–^ A dash (–) indicates the absence of plants with the respective GI.	1	22	67	9
ACO-14	–	1	3	20	66	10
ACO-09	–	–	–	15	64	21
IAPAR	–	–	–	7	55	38
BRS Apodi	–	–	4	22	62	12
BRS Sertaneja	–	–	–	1	54	45
Olivier	–	1	–	1	55	43
Coopama	–	–	–	–	50	50
ACO-15	–	–	–	7	74	19
Reci-02	–	–	–	1	60	39
ACO-05	–	–	–	1	56	43
Monami	–	–	–	6	54	40
ACO-13	6	–	–	3	64	27
ACO-10	–	–	–	1	52	47
Dominga	1	–	–	2	55	42
Ligia	–	–	–	2	63	35
Alha-06	–	–	–	–	58	42
Clone-47	–	–	–	–	47	53
ACO-19	–	–	–	3	68	29
FP-19	1	–	–	7	67	25
Nikki	–	–	–	3	66	31
Luísa	–	–	–	–	52	48

Ranking	Plot	Access	Plant	Gain	New mean
1	2	ACO-18	10	0.0000	77.34
2	3	ACO-13	6	0.0264	77.36
3	4	ACO-14	8	0.0507	77.39
4	2	ACO-13	10	0.0749	77.41
5	2	ACO-13	6	0.0990	77.43
6	6	FP-19	3	0.1231	77.46
7	4	ACO-13	5	0.1471	77.48
8	7	ACO-18	2	0.1708	77.51
9	4	BRS Apodi	9	0.1943	77.53
10	7	ACO-14	10	0.2177	77.55
11	3	ACO-18	10	0.2411	77.58
12	1	ACO-13	9	0.2642	77.60
13	1	ACO-13	1	0.2873	77.62
14	2	ACO-14	1	0.3104	77.65
15	8	BRS Apodi	2	0.3335	77.67
16	1	BRS Apodi	5	0.3564	77.69
17	3	ACO-14	1	0.379	77.72
18	5	ACO-14	3	0.4017	77.74
19	1	BRS Apodi	7	0.4242	77.76
20	3	ACO-14	6	0.4465	77.78
21	9	Dominga	9	0.4686	77.80
22	8	ACO-18	10	0.4907	77.83

Accession	Frequency of plants (%) based on RF
Accession	RF<1	RF≥1
ACO-18	27	73
ACO-14	14	86
ACO-09	1	99
IAPAR	1	99
BRS Apodi	17	83
BRS Sertaneja	2	98
Olivier	3	97
Coopama	11	89
ACO-15	3	97
Reci-02	0	100
ACO-05	0	100
Monami	1	99
ACO-13	22	78
ACO-10	2	98
Dominga	1	99
Ligia	8	92
Alha-06	4	96
Clone-47	0	100
ACO-19	4	96
FP-19	1	99
Nikki	2	98
Luísa	0	100

Ranking	Accession	Gain	New mean
1	ACO-18	0.0000	9.1118
2	ACO-13	0.5362	9.6543
3	Coopama	0.9967	10.1148
4	BRS Apodi	1.4151	10.5332
5	ACO-14	1.8741	10.9922

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[1] *Corresponding author

Brasil

Brasil

IDENTIFICATION OF SOURCES OF RESISTANCE TO Meloidogyne enterolobii IN ACEROLA1

IDENTIFICAÇÃO DE FONTES DE RESISTÊNCIA A Meloidogyne enterolobii EM ACEROLEIRA

ABSTRACT

IDENTIFICATION OF SOURCES OF RESISTANCE TO Meloidogyne enterolobii IN ACEROLA¹