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Contenu archivé le 2024-04-16

CROP DIVERSIFICATION THROUGH THE COMBINATION OF ZERO ANTINUTRITIONAL FACTORS AND HIGH DISEASE RESISTANCE CHARACTERS IN FUTURE FABA BEAN VARIETIES: GENETIC AND METHODOLOGY.

Objectif


The objective is to develop faba bean (Vicia faba) genotypes that are free of major antinutritional factors and simultaneously more resistant to disease. Inbred faba bean lines were distributed to have the material ready for crossing in greenhouses during the winter. These lines included cultivars resistant to uromyces, botrytis, ascochyta, orobanche and fusarium and also ones with zero tannin, vicine or covicine. A common cultivar (Alfred) and 2 specific cultivars for Cordoba and Palermo ('Amcor' and Gemini respectively), all high yielders, were included in the crossing scheme. The F1 and F2 generations have now been produced and seeds obtained for the next step. Insome cases, there were poor yields from several lines as well as differences in reciprocal crosses but this is believed to be due to poor yielding of the mother lines rather than to genetic causes. Pilot trials have been conducted to establish test methods for resistance to rust and fusarium.
Agricultural systems of developed countries have originated man problems, economical (surplusses, unbalanced world markets etc.) as well as technical (decreasing number of crops, narrower genetic rases, excessive use of chemicals etc.) and social (pollution of waters, soils and foods, etc.) Among the many changes needed to solve them, crop diversification seems to be a must in the short term. There are many crops that are of great interest, even if they are considered as of secondary importance from the point of view of a world economic perspective. One of these crops is the Faba Bean (Vicia Faba). New genes of potential importance in the future agriculture have been discovered during the last years, by several teams, and are now being transferred to high yielding cultivars.

The prospect will study the interactions between two sets of genes:

The first set includes genes for resistance to diseases (RD) that still challenge the cultivation of this species in several regions around the world (Chocolate Spot, Fusarium etc.); These genes will help in producing higher yields.

The second set includes genes that remove anti- nutritional factors (ANF) such as tannins and vicine and convicine from the seeds; These genes will help in producing a better quality product both for food and for feed.

The problem is: will both kind of genes be expressed in an independant way when put in the same genotype? Or, rather, they will interact with each other?

The projected work will produce experimental Faba Bean lines with a common genetic background but differing in RD and ANF genes. For example, tannin-free lines will be obtained differing only in the presence of the gene for resistance to Fusarium, etc. The task will be performed by crossing experimental RD lines with ANF-free ones, then obtaining F3 lines which will be analised from the point of view of nutritional quality. Molecular markers for the genes under study will be tested.

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Coordinateur

UNIVERSIDAD DE CORDOBA - ESCUELA TECNICA SUPERIOR DE INGENIEROS AGRONOMOS
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Adresse
AVDA MENENDEZ PIDAL 8N
14080 CORDOBA
Espagne

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