Download or read book Evaluation of Yield and Other Agronomic Characteristics of TPS Families and Advanced Clones from Different Breeding Schemes written by Luigi Concilio and published by . This book was released on 1985 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Production of New Potato Varieties written by G. J. Jellis and published by Cambridge University Press. This book was released on 1987-08-28 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is based on the proceedings of a joint meeting of EAPR and EUCARPIA at King's College, Cambridge, December 1985.

Download or read book Evaluations of Families and Clones from the 4Xx2X Breeding Scheme in Potato written by Jose Amauri Buso and published by . This book was released on 1986 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of the Tetraploid X Diploid 4x X 2x Mating Scheme and Its Efficiency in a New Breeding Program written by Luigi Concilio and published by . This book was released on 1986 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biotechnology and Ecology of Pollen written by David L. Mulcahy and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Recognition of the Forgotten Generation D. L. MULCAHyl Pollen was long believed to serve primarily a single function, that of delivering male gametes to the egge A secondary and generally overlooked value of pollen is that it serves to block the transmission of many defective alleles and gene combinations into the next generation. This latter function comes about simply because pollen tubes carrying defective haploid genotypes frequently fail to complete growth through the entire length of the style. However, the beneficial consequences of this pollen selection are diluted by the fact that the same deleterious genotypes are often transmitted through the egg at strictly mendelian frequencies (Khush, 1973). Gene expression in the pollen might thus at least appear to be a phenomenon of trivial consequence. Indeed, Heslop-Harrison (1979) rightly termed the gametophytic portion of the angiosperm life cycle, the "forgotten generation." This neglect, however, came about despite subtle but constant indications that pollen is the site of intense gene activity and selection. For example, Mok and Peloquin (1975) demonstrated that relatively heterozygous diploid pollen shows heterotic characteristics whereas relatively homozygous diploid pOllen does not. This was proof positive that genes are expressed (that is, transcribed and translated) in the pollen. 1 Department of Botany, University of Massachusetts Amherst, MA 01003, USA viii However, the implications for pollen biology of even this recent and well known study were not widely recognized.

Download or read book Genetica agraria written by and published by . This book was released on 1986 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Periodico di genetica applicata all'agricoltura," 1957-1978; "A journal devoted to agricultural genetics, " 1979-1988.

Download or read book Plant Breeding Abstracts written by and published by . This book was released on 1987 with total page 1544 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Haploids Wild Species and 2n Gametes in the 4x X 2x Breeding Scheme in Potato written by Georgia L. Yerk and published by . This book was released on 1989 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Efficiency of Potato Breeding Using 2n Gametes written by Rodomiro Ortiz and published by . This book was released on 1991 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Program Report 1992 written by International Potato Center and published by International Potato Center. This book was released on with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of 4x Clones and Families from 4x 2x Crosses in Potato written by Elizabeth Darmo and published by . This book was released on 1988 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book True Potato Seed written by and published by . This book was released on 1989 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Number of clones per family and clonal versus family selection in potato breeding programs written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Os programas de melhoramento da batata (Solanum tuberosum L.) têm como objetivo produzir clones superiores que resultam de cruzamentos entre pares de diferentes genitores. Visando à obtenção desses clones superiores, são realizados, normalmente, experimentos que avaliam um número excessivo de clones, mas não avaliam as famílias. Em conseqüência da escassez de informações sobre dimensionamento de famílias, objetivou-se com este trabalho determinar tamanhos adequados de famílias para a avaliação das mesmas nesses programas, considerando-se as estimativas de parâmetros genéticos, e comparar a seleção entre famílias e a seleção de clones, verificando-se a viabilidade desses tipos de seleção. Para isso, foram utilizadas 25 famílias clonais representando uma ampla gama de materiais genéticos, pertencentes ao Programa de Melhoramento Genético da Batata da Universidade Federal de Lavras (UFLA). Utilizou-se o delineamento látice triplo 5 x 5. Cada parcela foi composta por 30 clones distribuídos em 3 linhas de 10 plantas cada uma. Foram avaliados os seguintes caracteres: produção de tubérculos por planta, porcentagem de tubérculos graúdos, peso médio de tubérculos graúdos, peso médio de tubérculos médios e peso específico de tubérculos. Dessa forma, pode-se concluir que as estimativas dos coeficientes de variação experimental (CVe), coeficientes de variação genética (CVg), herdabilidade e relação CVg/CVe estabilizaram-se a partir de dois clones por parcela significando que a representatividade das famílias pode ser feita com um número pequeno de clones; pelo método da curvatura máxima, as famílias poderiam ser representadas por aproximadamente 36 clones por família; a variância genética dentro de famílias foi maior que a variância genética entre famílias, para todos os caracteres, indicando um potencial favorável à seleção dentro de famílias; a correlação das médias das famílias com os 5%, 10%, 15% e 20% melhores clones de cada família, considerando-se as cinco características avaliadas, foi sempre crescente, significando que as melhores famílias possuem, de modo geral, os melhores clones.

Download or read book Innovative Methods for Propagating Potatoes written by and published by International Potato Center. This book was released on 1985 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Program Report 1993 1994 written by International Potato Center and published by International Potato Center. This book was released on with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CIP in written by International Potato Center and published by . This book was released on 1993 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Potato Crop written by Hugo Campos and published by Springer Nature. This book was released on 2019-12-03 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is open access under a CC BY 4.0 license. This book provides a fresh, updated and science-based perspective on the current status and prospects of the diverse array of topics related to the potato, and was written by distinguished scientists with hands-on global experience in research aspects related to potato. The potato is the third most important global food crop in terms of consumption. Being the only vegetatively propagated species among the world’s main five staple crops creates both issues and opportunities for the potato: on the one hand, this constrains the speed of its geographic expansion and its options for international commercialization and distribution when compared with commodity crops such as maize, wheat or rice. On the other, it provides an effective insulation against speculation and unforeseen spikes in commodity prices, since the potato does not represent a good traded on global markets. These two factors highlight the underappreciated and underrated role of the potato as a dependable nutrition security crop, one that can mitigate turmoil in world food supply and demand and political instability in some developing countries. Increasingly, the global role of the potato has expanded from a profitable crop in developing countries to a crop providing income and nutrition security in developing ones. This book will appeal to academics and students of crop sciences, but also policy makers and other stakeholders involved in the potato and its contribution to humankind’s food security.