1 / 9

Landraces : Infra-specific Diversity & Adaptive Divergence

Landraces : Infra-specific Diversity & Adaptive Divergence. Of an Endangered Evolutionary Link [1]. Main Objective. Debate the status, value, relevance & utility of LRs of major & minor crops in the 21 st Century. Indigenous Farming Communities.

hei
Télécharger la présentation

Landraces : Infra-specific Diversity & Adaptive Divergence

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Landraces: Infra-specific Diversity & Adaptive Divergence Of an Endangered Evolutionary Link [1]

  2. Main Objective • Debate the status, value, relevance & utility of LRs of major & minor crops in the 21st Century.

  3. Indigenous Farming Communities • Contributed, for millennia, to the evolution, enrichment, & in situ conservation of crop LRs.

  4. Landraces • Genetically heterogeneous populations comprising inbreeding lines & hybrid segregates which have evolved over 1000’s of years in a multitude of environments and local farming systems. • Developed abundant patterns of variation, & represent a largely untapped reservoir of useful genes for adaptation to biotic & abiotic stresses.

  5. LRs • Landrace cultivation has been discouraged in many developing countries: • Low yield potential. • Susceptibility to diseases.

  6. LRs • Make up <30% of germplasm collections in genebanks • Loss of their GD • genetic erosion on the farm & • genetic drift upon regeneration and seed increase cycles. • Need for on-farm conservation.

  7. Specific Objectives • Assess infra-specific diversity in LRs of major & minor crop species. • Quantify levels of divergence for and adaptive value of agronomic, biochemical & molecular traits. • Assess LR germplasm status in ex situ & how ex situ conservation affects LR diversity & utilization.

  8. Specific Objectives • Evaluate farmers’ efforts to conserve LRs. • Assess the impact of plant breeding on LR diversity in LDCs. • Strategies to promote LR use as a source of broad GD in agriculture at different levels (farming system, farm & species)

  9. Questions • 1. What are wheat landraces; why they are important; what is their potential? • 2. Practical Guidelines – How to restore & maintain LRs on the farm?, and • 3. How to restore community seed systems?

More Related