In Vitro Methods for Conservation of Plant Genetic Resources formatIsbn:Softcover - 9789401053624 cyclo and iso remain

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In Vitro Methods for Conservation of Plant Genetic Resources formatIsbn:Softcover - 9789401053624 cyclo and iso remainHowever, the transition from primitive to 'advanced' cultivars has had the effect of narrowing the genetic base. This has happened in two distinct ways: (1) selection for relative uniformity, resulting in 'pure' lines, multi lines, single or double hybrids, etc. ; and (2) selection for closely defined objectives. Both of these processes have resulted in a marked reduction in genetic variation. At the same time, there has been a tendency to restrict