Fecha/hora: 16/06/2024 09:48:00

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	29/01/2020	
Fecha de la última actualización: 	29/01/2020	
Autoria: 	CONDON, F.; GUSTUS, CH.; RASMUSSON, D.C.; SMITH, K.P.	
Afiliación: 	FEDERICO CONDON PRIANO, Dep. of Agronomy and Plant Genetics, Univ. of Minnesota, St. Paul, MN, United States: INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; CHARLES GUSTUS, Dep. of Agronomy and Plant Genetics, Univ. of Minnesota, St. Paul, MN, United States; DONALD C. RASMUSSON, Dep. of Agronomy and Plant Genetics, Univ. of Minnesota, St. Paul, MN, United States; KEVIN P. SMITH, Dep. of Agronomy and Plant Genetics, Univ. of Minnesota, St. Paul, MN, United States.	
Título: 	Effect of advanced cycle breeding on genetic diversity in barley breeding germplasm.	
Año de publicación: 	2008	
Fuente/Imprenta: 	Crop Science, May 2008, Volume 48, Issue 3, Pages 1027-1036. Doi: https://doi.org/10.2135/cropsci2007.07.0415	
ISSN: 	0011-183X	
DOI: 	10.2135/cropsci2007.07.0415	
Idioma: 	Inglés	
Notas: 	Article history: Published May, 2008.	
Contenido: 	ABSTRACT.
Plant breeding that emphasizes crosses among elite parents in a closed population (advanced cycle breeding) is presumed to decrease genetic diversity. To assess the effect of plant breeding on allelic diversity, we evaluated regional ancestors, parental lines, and cultivar candidates from the University of Minnesota six-rowed barley (Hordeum vulgare L.) breeding program between 1958 and 1998 using pedigree information, 70 simple sequence repeat (SSR) markers, and a gene specific marker. Pedigree and SSR allelic diversity indices revealed a decrease in genetic diversity, from an average of 5.89 alleles per locus in the ancestors group to 2.34 alleles per locus in the fourth decade of breeding. A correspondence analysis showed differentiation in the germplasm with time. At specific loci, we detected both reductions and no change in the number of alleles over time. Several marker loci that demonstrated a reduction in number of alleles were associated with major loci for disease resistance or malting quality and were presumably under selection during breeding. Assessment of locus-specific allelic variation across the genome in breeding germplasm should identify both the regions of the genome that should be conserved and the regions of the genome where there are opportunities to introgress new allelic diversity without disrupting desirable gene complexes. 
© Crop Science Society of America. All rights reserved.	
Palabras-Clave: 	BARLEY; HORDEUM.	
Thesagro: 	CEBADA.	
Categoría del tema: 	F01 Cultivo	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (102124-1) - PXI - AP - DD - PP/CROP SCIENCE/2008 -  -  - DIS