By H D Cooper, Toby Hodgkin, Charlie Spillane
This ebook makes a speciality of the formerly overlooked interface among the conservation of plant genetic assets and their usage. merely via usage can the capability price of conserved genetic assets be realised. despite the fact that, as this ebook exhibits, a lot conserved germplasm should be subjected to long term pre-breeding and genetic enhancement prior to it may be utilized in plant breeding programmes.The authors discover the reason and methods for such pre-breeding efforts because the foundation for broadening the genetic bases of crop creation. Examples from quite a number significant meals vegetation are provided and matters analysed through best professionals from all over the world.
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Extra resources for Broadening the Genetic Bases of Crop Production
1996) Designing Seed Systems with Small Farmers: Principles Derived from Bean Research in the Great Lakes region of Africa. Agricultural Research and Extension Network Paper No. 60, London, ODI. D. R. (1996) Farmer participatory crop improvement. III. Participatory plant breeding, a case for rice in Nepal. Experimental Agriculture 32, 479–496. A. (1969) Evolutionary plant breeding. Crop Science 9, 119–121. W. and Cervigni, R. (1994) The Appropriation of the Benefits of Plant Genetic Resources for Agriculture: an Economic Analysis of the Alternative Mechanisms for Biodiversity Conservation.
Founder effects can sometimes lead to a morphologically distinct species or race, when the founder population’s genepool undergoes what Mayr (1954) called a ‘genetic revolution’ to develop new coadapted gene complexes, in response to new selection pressures (Templeton, 1981). Quantitative variation may harbour potentially strong epistatic components, and such cryptic epistatic variation may become important when allele frequencies are substantially disturbed by selection or a population bottleneck (Goodnight, 1987; Wade, 1992).
Carroll and de Maine, 1989; Simmonds, 1993. Material of 25% wild and Ortiz, Chapter 10, this 75% ‘tuberosum’ germplasm. volume. Test crosses in well-structured New clones and parents. mating designs. Simmonds, 1993. Weak mass selection, longterm, alternating between seedlings and clonal selections. Simmonds, 1993; Simmonds 1989. Proposed programme. New plantation material. continued 15 Rubber (RRI, Malaysia) Wild Amazonian material. To overcome the very narrow genetic base derived from very small original population derived from the centre of origin.