Title:	Sixteen years of recurrent selection of ruzi grass for resistance to spittlebugs (Hemiptera: Cercopidae).
Authors:	RESENDE, T. T. SOUZA SOBRINHO, F. de CAMPAGNAN, M. O. VERÍSSIMO, B. A. CALSAVARA, L. A. GONÇALVES, F. M. A. NUNES, J. A. R. AUAD, A. M.
Affiliation:	TIAGO TEIXEIRA RESENDE, UNIVERSIDADE FEDERAL DE JUIZ DE FORA FAUSTO DE SOUZA SOBRINHO, CNPGL MICHELLE OLIVEIRA CAMPAGNAN BRUNO ANTÔNIO VERÍSSIMO, UNIVERSIDADE FEDERAL DE JUIZ DE FORA LUÍS AUGUSTO CALSAVARA FLÁVIA MARIA AVELAR GONÇALVES, UNIVERSIDADE FEDERAL DE LAVRAS JOSÉ AIRTON RODRIGUES NUNES, UNIVERSIDADE FEDERAL DE LAVRAS ALEXANDER MACHADO AUAD, CNPGL.
Date Issued:	2024
Citation:	Agronomy, v. 14, 1516, 2024.
Description:	The forage Urochloa ruziziensis ((R. Germ. and C.M. Evrard) Crins (synonym Brachiaria ruziziensis) (Poales: Poaceae)) has great potential to be adopted as pasture. However, this forage is susceptible to spittlebugs, the main insect pest of pastures in Brazil. Thus, the objective of this study was to select genotypes of U. ruziziensis resistant to Deois schach (Fabricius) and Mahanarva spectabilis (Distant) (Hemiptera: Cercopidae) through 16 cycles of recurrent selection. The resistance of 13,114 U. ruziziensis plants to spittlebugs was evaluated in experiments conducted between 2008 and 2023. Each plant was infested with six eggs of the insect pest at stage S4 and kept in a greenhouse for up to 40 days. After this period, surviving nymphs from the second to fifth instars were counted. The original population of U. ruziziensis (POP01-2008) presented a nymphal survival rate of 63%, while for the improved population (POP36-2023) the average nymphal survival rate was 32.8%. The estimated total genetic gain was 15%, and the annual genetic gain was 1%. After 16 selection cycles, in POP36-2023, approximately 63% of the genotypes (716 plants), had nymphal survival rates equal to or less than 33% and were considered resistant to D. schach and M. spectabilis nymphs.
Thesagro:	Forragem Inseto Capim Cigarrinha
NAL Thesaurus:	Forage Insect pests
DOI:	https://doi.org/10.3390/agronomy14071516
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPGL)