Author: Wayne Allen ParrottPublisher:
ISBN:
Category : Red clover
Languages : en
Pages : 144
Book Description
The Occurrence and Use of 2n Gametes in Red Clover, Trifolium Pratense L.
Author: Wayne Allen ParrottPublisher:
ISBN:
Category : Red clover
Languages : en
Pages : 144
Book Description
The Selection, Use, and Inheritance of 2n Gametes in Red Clover
Author: Wayne Allen ParrottRed Clover Science
Author: N.L. TaylorPublisher: Springer Science & Business Media
ISBN: 9401586926
Category : Science
Languages : en
Pages : 246
Book Description
This book examines the literature on red clover since about 1985. In each of the 17 chapters, an effort was made to summarize the earlier literature and to integrate the recent findings into this background. The timing is appropriate with the present interest in sustainable agriculture, in which red clover was so prominent in the past. This is the first book to be published which deals solely with this important forage species. Audience: Primarily scientists and scientifically trained technicians who will appreciate an up-to-date summary on red clover.
University of Wisconsin Agronomy Department, the First 100 Years
Author: University of Wisconsin--Madison. Department of AgronomyPublisher:
ISBN:
Category : Agronomy
Languages : en
Pages : 448
Book Description
Agronomy News
Author: Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 622
Book Description
Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.
Canadian Journal of Genetics and Cytology
Author: The Occurrence of Unreduced Gametes in Modern Roses - Quantitative Measurement of DNA by Fluorescent Microscopy of Pollen Grain
Author: Chih-Cheng ChaoFodder Crops and Amenity Grasses
Author: Beat BollerPublisher: Springer Science & Business Media
ISBN: 1441907602
Category : Science
Languages : en
Pages : 527
Book Description
Grassland farming in Europe was already established during the settlement of the rst farmers together with their domesticated animals after the last ice age. Since then, grassland provides the forage basis to feed ruminant animals for the p- duction of meat and milk. Depending on the ecological conditions and intensity of usage, various plant communities with different species developed, displaying a rich biodiversity. With the introduction of improved crop rotations at the end of the 16th century, grasses and legumes were also grown to an important extent as forage crops on arable land. In the last decades the importance of amenity grasses increased markedly, due to the demand of the society for new usages like landscape protection. Around 1900 interested farmers and academics identi ed the need for gra- land improvement through systematic selection and seed production. This marks the beginning of breeding and research in companies but also at universities and specialized research institutes. Plant collection started with many of the species that are still of importance today. The collected materials were grouped according to the intended use and some type of phenotypic selection was applied. Seed mul- plication of such populations was performed in pure stands and the harvested seed was marketed. Although the vegetative biomass and its quality are of utmost imp- tance in forage crop breeding, it is the seed yield potential which determines the commercial success of a new variety.
Biotechnology and Ecology of Pollen
Author: David L. MulcahyPublisher: Springer
ISBN: 9781461386247
Category : Technology & Engineering
Languages : en
Pages : 0
Book Description
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.
Author: