Data/hora: 10/06/2024 11:25:20

Provedor de dados: 	Scientia Agricola	
País: 	Brazil	
Título: 	Reaction of sources of resistance to white mold to microsatellite haplotypes of Sclerotinia sclerotiorum	
Autores: 	Lehner,Miller da Silva; Paula Júnior,Trazilbo José de; Vieira,Rogério Faria; Lima,Renan Cardoso; Soares,Bruno de Almeida; Silva,Rhaphael Alves.	
Data: 	2016-04-01	
Ano: 	2016	
Palavras-chave: 	Phaseolus vulgaris; Common bean; Crop breeding; Variability.	
Resumo: 	ABSTRACT White mold caused by the fungus Sclerotinia sclerotiorum is the most yield-limiting disease of common bean in Brazil. To date, there has been no commercial cultivar resistant to this disease. In a greenhouse we evaluated white mold resistance sources (Cornell 605, A195 and G122) against eight isolates of S. sclerotiorum from five Brazilian states. A Brazilian cultivar (BRSMG Madrepérola) and a susceptible check (Beryl) were used as control. Treatments were arranged in factorial combinations (5 × 8) in a completely random design with four replicates. Disease severity was assessed on a rating scale of 1-to-9 together with lesion length, which was used to determine an area under the disease progress curve (AUDPC). Polymorphisms detected in ten microsatellite loci were used to assess variability between the isolates. Each isolate was a distinct haplotype; they formed a genetic tree with two clusters. One cluster was formed by three isolates collected from the states of Minas Gerais and São Paulo (southeastern); the others, by isolates from Paraná, Santa Catarina (southern), Goiás (Mid-western), and again, Minas Gerais. Genotype × isolate interaction was significant. In general, Beryl was more susceptible than BRSMG Madrepérola. Considering the AUDPC and/or the white mold reaction score, Cornell 605 exhibited more physiological resistance than BRSMG Madrepérola to seven isolates, A195 to five isolates, and G122 to two isolates. Our results suggest that Cornell 605 is the best source of resistance to white mold for the southern region, whereas Cornell 605 and A195 are somewhat superior to G122 for the southeastern and mid-western regions.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000200184	
Editor: 	São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"	
Relação: 	10.1590/0103-9016-2015-0085	
Formato: 	text/html	
Fonte: 	Scientia Agricola  v.73 n.2 2016	
Fonte: 	info:eu-repo/semantics/openAccess