Banca de DEFESA: Thavio Junior

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Thavio Junior
DATE: 28/09/2022
TIME: 14:00
LOCAL: Videoconferência
TITLE:

"Reaction of pulses genotypes (chickpeas, peas and lentils), peppers and sweet potatoes to the root-knot nematode (Meloidogyne enterolobii)".

KEY WORDS:

Capsicum, Cicer arietinum, Ipomoea batatas, Pisum sativum, genetic resistance.

PAGES: 95
BIG AREA: Ciências Biológicas
AREA: Biologia Geral
SUMMARY:

Meloidogyne enterolobii is an emerging nematode species in Brazil. This species has been considered one of the most aggressive among root-knot nematodes and has been causing damage to vegetables and other crops of economic importance, including under the presence of genetic resistance to other species of this genus. Genetic resistance in plants, whenever available, is the most efficient and economical way to control root-knot nematodes. In this sense, the search for sources of resistance is of great importance for the control of this nematode. Crops of economic importance, including pulses, as peas (Pisum sativum L.), chickpeas (Cicer arietinum L.) and lentils (Lens culinaris Medik.), as well as vegetables such as pepper (Capsicum spp.) and sweet potato (Ipomoea batatas (L.) Lam.), are drastically affected by Meloidogyne spp. The reaction to M. enterolobii was evaluated in 14 genotypes of pea, 06 of chickpeas, 01 of lentil, 27 of pepper (Capsicum chinense), 07 of bell pepper (C. annuum) and 08 of sweet potato. All experiments were carried out in a greenhouse, in a completely randomized design with 06 replications and each plant was inoculated with 5000 eggs and eventual second-stage juveniles (J2). For the reaction of pulses and sweet potato genotypes to M. enterolobii, the experiments were repeated twice in time. As for the reaction of peppers, two experiments were installed, one for C. chinense and another for C. annuum. Sixty-five days after inoculation (DAI) for pea, chickpea, lentil and pepper crops and at 90 DAI for sweet potato. The following nematological variables were evaluated: gall index (GI), egg mass index (IMO), number of eggs per gram of root (NOGR) and the reproduction factor (FR). None of the pea, chickpea, lentil and pepper genotypes evaluated showed resistance to M. enterolobii. However, 03 sweet potato genotypes (BGBD 1399, MD 1609024 and MD 1610036) were classified as resistant. Given the importance and prospects of expansion of these crops in Brazil, the results of this study significantly contribute to the knowledge of their reaction of genotypes of these crops to this species of nematode, as well as to identify potential sources of resistance for breeding programs aimed at the development of cultivars, and meeting the continuous need for research to select genotypes with resistance to M. enterolobii.

BANKING MEMBERS:
Interno - 1701961 - CLEBER FURLANETTO
Externo à Instituição - DILSON DA CUNHA COSTA - EMBRAPA
Presidente - 6404906 - JUVENIL ENRIQUE CARES
Externo à Instituição - VALDIR RIBEIRO CORREIA - IFTO