Chromosome Morphology of Certain Races of Maize in Latin America


Book Description

Introduction; Chromosome morphology of primitive races of maize in Mexico,Central and South America; The chromosomes of Central American Corns; The chromosomes of Caribbean Corns; Discussion and conclusions; Literature cited; Appendix.




Identification of Chromosome Segments that Contribute to the Specificity of Racial Characteristics in Maize


Book Description

The objective of this study was explore possible associations between heterochromatic chromosome knobs and racial characteristics in maize and thus to identify chromosomal segments which contribute to racial specifity. Plants from two races widely different in knob constitution and morphological characteristics were crossed reciprocally. The resulting F1 and F2 generations were studied. Cytological observations and me measurements of the 16 characters most distinctive of the two races were on 60 f1 and 126 F2 plants. Results were statistically significant in 48 cases of association between knobs and characteristics among the 150 analyzed. In nine cases the level of significance was P- 1% and in the other 39 cases 2,5% P 10%. Signicante differences bet- ween plants with heterozygous knobs and the mean of homozygous knobbed and knobless plants are taken to mean that the condition of the knob can reflect the condition of the genes linked to it. The association of knobs and characteristics was postulated as a mechanism by which knobs are selected during the formation of races in maize.







Races of Maize in Mexico


Book Description

History of maize classification. How races used in classification. Geographical distribution. Existing races of maize in Mexico.




Maize


Book Description

This book examines one of the thorniest problems of ancient American archaeology: the origins and domestication of maize. Using a variety of scientific techniques, Duccio Bonavia explores the development of maize, its adaptation to varying climates and its fundamental role in ancient American cultures. An appendix (by Alexander Grobman) provides the first-ever comprehensive compilation of maize genetic data, correlating this data with the archaeological evidence presented throughout the book. This book provides a unique interpretation of questions of dating and evolution, supported by extensive data, following the spread of maize from South to North America and eventually to Europe and beyond.




Handbook of Maize


Book Description

Maize is one of the world’s highest value crops, with a multibillion dollar annual contribution to agriculture. The great adaptability and high yields available for maize as a food, feed and forage crop have led to its current production on over 140 million hectares worldwide, with acreage continuing to grow at the expense of other crops. In terms of tons of cereal grain produced worldwide, maize has been number one for many years. Moreover, maize is expanding its contribution to non-food uses, including as a major source of ethanol as a fuel additive or fuel alternative in the US. In addition, maize has been at the center of the transgenic plant controversy, serving as the first food crop with released transgenic varieties. By 2008, maize will have its genome sequence released, providing the sequence of the first average-size plant genome (the four plant genomes that are now sequenced come from unusually tiny genomes) and of the most complex genome sequenced from any organism. Among plant science researchers, maize has the second largest and most productive research community, trailing only the Arabidopsis community in scale and significance. At the applied research and commercial improvement levels, maize has no peers in agriculture, and consists of thousands of contributors worthwhile. A comprehensive book on the biology of maize has not been published. The "Handbook of Maize: the Genetics and Genomics" center on the past, present and future of maize as a model for plant science research and crop improvement. The books include brief, focused chapters from the foremost maize experts and feature a succinct collection of informative images representing the maize germplasm collection.




Maize genetic resources


Book Description




From Chromosomes to Mobile Genetic Elements


Book Description

This biography of Nobel Laureate Barbara McClintock (1902-1992) places her life and work in its social, scientific and personal context. The author examines the development of Barbara McClintock’s scientific work and her influence upon individuals and upon the fields of cytogenetics and evolutionary biology in the period from 1902 to the present. The history documents years of McClintock’s notable and lauded scientific work long before she discovered and named transposable elements in the mid-1940s for which she ultimately received the Nobel Prize. The biography employs documented evidence to expose, demystify, and provide clarity for legends and misinterpretations of McClintock’s life and work. Key Features Exposes and demystifies myths and legends told about McClintock’s time in Missouri Clarifies the changing language of genes and genetics Places in perspective the history of McClintock’s research Documents McClintock’s family and early life before college Provides documented details of McClintock’s time in Nazi Germany