Resistance to Enneothrips flavens Moulton and genetic parameters estimation in interspecific genotypes of peanut

 Peanut is an oilseed crop of great importance for Brazilian agribusiness. A major factor affecting its production is pest incidence, mainly thrips. This study aimed to evaluate the potential for resistance to Enneothrips flavens in genotypes derived from the cross between IAC 503 and the amphidiplo...

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Bibliographic Details
Published in:Acta scientiarum. Agronomy 2017, Vol.39 (3), p.339-348
Main Authors: Pirotta, Melina Zacarelli, Silva, Fabiana Mota da, Michelotto, Marcos Doniseti, Fávero, Alessandra Pereira, Godoy, Ignácio José de, Unêda-Trevisoli, Sandra Helena
Format: Article
Language:English
Subjects:
Agribusiness
AGRONOMY
Arachis hypogaea L
Enneothrips flavens
Genetic crosses
Genotypes
High resistance
Infestation
Insects
Interspecific
Parameter estimation
Parents
Peanuts
Phenotypes
Progeny
REML/BLUP
resistance to insects
Signs and symptoms
thrips
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Summary: Peanut is an oilseed crop of great importance for Brazilian agribusiness. A major factor affecting its production is pest incidence, mainly thrips. This study aimed to evaluate the potential for resistance to Enneothrips flavens in genotypes derived from the cross between IAC 503 and the amphidiploid (A. magna x A. cardenasii)4x and to estimate the genetic and phenotype parameters in these genotypes, allowing for better targeting in the selection. The experiments were conducted in a Federer augmented block design with additional checks in two generations (F3 and F4). Resistance to thrips was evaluated by its natural infestation and the symptoms of attacks by the insect. They were also evaluated using agronomic trait indicators of interspecific segregating with cultivated species. The results indicated that the selected progeny exhibited high resistance to thrips compared to commercial genotypes, and they had the amphidiploid as the insect resistance source. Some progenies selected as resistant also had good production traits, but with the degree of suitability to the A. hypogaea L. genotypes still low, the use of a backcross as an alternative for the introgression of resistance genes and the consequent recovery of adapted genotypes of superior recurring parents is suggested. 
ISSN:1679-9275
1807-8621
1807-8621
DOI:10.4025/actasciagron.v39i3.32776