{"product_id":"9780412338700","title":"In Vitro Methods for Conservation of Plant Genetic Resources","description":"\u003ch1\u003eIn Vitro Methods for Conservation of Plant Genetic Resources\u003c\/h1\u003e \u003ch2\u003eDodds, J.H.\u003c\/h2\u003e \u003cp\u003eHowever, 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 the gene pool from which parental material has been drawn. This is a result of the high level of productivity achieved when breeding within a restricted but well-adapted gene pool, and of breeding methods which have made it possible to introduce specifically desired improvements, such as disease resistance and quality characteristics, into breeding stocks with a minimum of disturbance to genotypic structure. Developments in agriculture, such as intensive mechanization, the widespread application of fertilizers and the use of herbicides, fungicides and pesticides, have created a situation whereby a few, selected high­ yielding cultivars may be grown over large parts of the earth, so further contributing to a decline in crop genetic diversity. This process is under way in all countries, both developed and developing, and unfortunately in­ cludes some of the richest primary and secondary gene centres of several important food crops.\u003c\/p\u003e \u003ch3\u003eDetails\u003c\/h3\u003e \u003cp\u003ePublished by: Springer\u003c\/p\u003e \u003cp\u003ePublication Date: 1990-12-31\u003c\/p\u003e \u003cp\u003eFormat: Hardcover\u003c\/p\u003e \u003cp\u003eISBN-13: 9780412338700\u003c\/p\u003e \u003cp\u003eDOI: 10.1007\/978-94-011-3072-1\u003c\/p\u003e \u003cp\u003eDimensions: 235cm x155cm\u003c\/p\u003e \u003cp\u003ePages: 247\u003c\/p\u003e ","brand":"Springer Netherlands","offers":[{"title":"Default Title","offer_id":46312333279372,"sku":"9780412338700","price":152.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/9545\/1788\/files\/9780412338700.jpg?v=1771524431","url":"https:\/\/fh90cf-fv.myshopify.com\/products\/9780412338700","provider":"Late Knight Books and Services, LLC","version":"1.0","type":"link"}