Developing a breeding strategy for multiple trait selection in Prosopis alba Griseb., a native forest species of the Chaco Region in Argentina

Prosopis alba is a native forest tree growing in arid and semi-arid regions of Argentina. It is a multipurpose species suitable for silvopastoral systems. The breeding programmes of P. alba in Argentina started ~25 years ago. Although several important advances have been made, the number of experime...

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Autores principales: Bessega, Cecilia Fabiana, Saidman, Beatriz Ofelia, Vilardi, Juan Cesar
Publicado: 2017
Materias:
agroforestry
clonal organism
diameter
experimental study
growth
height
native species
orchard
pasture
plant breeding
silviculture
size
tree
Argentina
Chaco [Argentina]
Prosopis alba
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0015752X_v90_n2_p199_Carreras
http://hdl.handle.net/20.500.12110/paper_0015752X_v90_n2_p199_Carreras
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0015752X_v90_n2_p199_Carreras
record_format dspace
spelling paper:paper_0015752X_v90_n2_p199_Carreras2023-06-08T14:38:10Z Developing a breeding strategy for multiple trait selection in Prosopis alba Griseb., a native forest species of the Chaco Region in Argentina Bessega, Cecilia Fabiana Saidman, Beatriz Ofelia Vilardi, Juan Cesar agroforestry clonal organism diameter experimental study growth height native species orchard pasture plant breeding silviculture size tree Argentina Chaco [Argentina] Prosopis alba Prosopis alba is a native forest tree growing in arid and semi-arid regions of Argentina. It is a multipurpose species suitable for silvopastoral systems. The breeding programmes of P. alba in Argentina started ~25 years ago. Although several important advances have been made, the number of experimental stands is small in comparison with other forest species. In this study genetic parameters in several traits of economic importance were evaluated, including tree form (number of stems), height, diameter and size increments in an experimental stand. These traits exhibit significant heritabilities. The trade-off between genetic gain and increase of average kinship in the selected group was considered. With an elite group of 20 trees, the average group kinship drops from 0.5 to 0.03. An important constraint to selecting multiple traits was that the improvement on height and diameter was associated with a reduction in the form of the trees. The strategy of using a selection index was evaluated giving variable weights to tree form, height and diameter. Although gain at individual trait levels is reduced in comparison with the potential maximum, index selection allows significant gains for all three traits and represents a suitable strategy to improve P. alba stands in order to establish clonal seed orchards. © Institute of Chartered Foresters, 2016. All rights reserved. Fil:Bessega, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Saidman, B.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vilardi, J.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0015752X_v90_n2_p199_Carreras http://hdl.handle.net/20.500.12110/paper_0015752X_v90_n2_p199_Carreras
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic agroforestry
clonal organism
diameter
experimental study
growth
height
native species
orchard
pasture
plant breeding
silviculture
size
tree
Argentina
Chaco [Argentina]
Prosopis alba
spellingShingle agroforestry
clonal organism
diameter
experimental study
growth
height
native species
orchard
pasture
plant breeding
silviculture
size
tree
Argentina
Chaco [Argentina]
Prosopis alba
Bessega, Cecilia Fabiana
Saidman, Beatriz Ofelia
Vilardi, Juan Cesar
Developing a breeding strategy for multiple trait selection in Prosopis alba Griseb., a native forest species of the Chaco Region in Argentina
topic_facet agroforestry
clonal organism
diameter
experimental study
growth
height
native species
orchard
pasture
plant breeding
silviculture
size
tree
Argentina
Chaco [Argentina]
Prosopis alba
description Prosopis alba is a native forest tree growing in arid and semi-arid regions of Argentina. It is a multipurpose species suitable for silvopastoral systems. The breeding programmes of P. alba in Argentina started ~25 years ago. Although several important advances have been made, the number of experimental stands is small in comparison with other forest species. In this study genetic parameters in several traits of economic importance were evaluated, including tree form (number of stems), height, diameter and size increments in an experimental stand. These traits exhibit significant heritabilities. The trade-off between genetic gain and increase of average kinship in the selected group was considered. With an elite group of 20 trees, the average group kinship drops from 0.5 to 0.03. An important constraint to selecting multiple traits was that the improvement on height and diameter was associated with a reduction in the form of the trees. The strategy of using a selection index was evaluated giving variable weights to tree form, height and diameter. Although gain at individual trait levels is reduced in comparison with the potential maximum, index selection allows significant gains for all three traits and represents a suitable strategy to improve P. alba stands in order to establish clonal seed orchards. © Institute of Chartered Foresters, 2016. All rights reserved.
author Bessega, Cecilia Fabiana
Saidman, Beatriz Ofelia
Vilardi, Juan Cesar
author_facet Bessega, Cecilia Fabiana
Saidman, Beatriz Ofelia
Vilardi, Juan Cesar
author_sort Bessega, Cecilia Fabiana
title Developing a breeding strategy for multiple trait selection in Prosopis alba Griseb., a native forest species of the Chaco Region in Argentina
title_short Developing a breeding strategy for multiple trait selection in Prosopis alba Griseb., a native forest species of the Chaco Region in Argentina
title_full Developing a breeding strategy for multiple trait selection in Prosopis alba Griseb., a native forest species of the Chaco Region in Argentina
title_fullStr Developing a breeding strategy for multiple trait selection in Prosopis alba Griseb., a native forest species of the Chaco Region in Argentina
title_full_unstemmed Developing a breeding strategy for multiple trait selection in Prosopis alba Griseb., a native forest species of the Chaco Region in Argentina
title_sort developing a breeding strategy for multiple trait selection in prosopis alba griseb., a native forest species of the chaco region in argentina
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0015752X_v90_n2_p199_Carreras
http://hdl.handle.net/20.500.12110/paper_0015752X_v90_n2_p199_Carreras
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