Origin Of Cultivated Rice

This book aims to up-date our present understanding of the origin of cultivated rice and in doing so involves different disciplines of biology and the archaeological-historical sciences. Various recent discoveries are reviewed and questions posed for further consideration by the reader. The book covers a wide range of studies on problems relative to the origin of cultivated rice, placing emphasis on ecological and genetical aspects. Comparisons are made between two cultivated rice species, independently evolved in Asia and Africa from respective wild progenitors. Phenomena are observed during mixed planting and hybrids discussed. Detailed information is presented about Asian common wild rice, thought to be the ancestor of common rice. The dynamics of domestication are considered with regard to hybridization, selection, formation of weedy types and the accumulation of genetic diversity. Also included are recent archaeological findings in relation to the beginnings of rice culture, leading to the hypothesis of diffused origins. Cultivars of common rice fall into one of two types called Indica and Japonica. The dynamics of differentiation are discussed, giving evidence and different hypotheses. Information on the genetic bases and functions of various reproductive barriers found between the cultivated and wild taxa is presented and discussed. The practical aspects of crop-evolutionary studies concerned with the breeding phylosophy and germplasm conservation are briefly commented on and arguments for rediversification of crop germplasm and conservation of the environment given. Senior scientists and post-graduate students interested in rice genetics, crop evolution, and related sciences will find this book invaluable.

This book aims to up-date our present understanding of the origin of cultivated rice and in doing so involves different disciplines of biology and the archaeological-historical sciences. Various recent discoveries are reviewed and questions posed for further consideration by the reader.The book covers a wide range of studies on problems relative to the origin of cultivated rice, placing emphasis on ecological and genetical aspects. Comparisons are made between two cultivated rice species, independently evolved in Asia and Africa from respective wild progenitors. Phenomena are observed during mixed planting and hybrids discussed. Detailed information is presented about Asian common wild rice, thought to be the ancestor of common rice. The dynamics of domestication are considered with regard to hybridization, selection, formation of weedy types and the accumulation of genetic diversity. Also included are recent archaeological findings in relation to the beginnings of rice culture, leading to the hypothesis of diffused origins. Cultivars of common rice fall into one of two types called Indica and Japonica. The dynamics of differentiation are discussed, giving evidence and different hypotheses. Information on the genetic bases and functions of various reproductive barriers found between the cultivated and wild taxa is presented and discussed. The practical aspects of crop-evolutionary studies concerned with the breeding phylosophy and germplasm conservation are briefly commented on and arguments for rediversification of crop germplasm and conservation of the environment given.Senior scientists and post-graduate students interested in rice genetics, crop evolution, and related sciences will find this book invaluable.

Origin and Phylogeny of Rices provides an evolutionary understanding of the origin, spread, and extent of genetic diversity in rice. This single volume is the first to review and synthesize the significant work done in this area in the last 30 years. Rice is the most important food crop of humankind. It provides more energy and also forms the staple food for more humans than any other food plant. This book assesses multiple aspects of this crucial crop in chapters devoted to rice's history and spread, phylogeny of the genus Oryza, Oryza species and their interrelationships, and the origins of west African and Asian rice. Offers an interpretive review of the latest research on this vital crop Guides further research and understanding with an extensive list of references Enhances the presentation of concepts via illustrations throughout

Recent studies have shown that despite gross differences in genome size, the gene order in the cereal genomes has remained remarkably similar. This observation implies that the small genome of rice will reflect the basic structure of the cereal genomes. Rice will therefore become an important tool for all cereal geneticists/molecular biologists as information generated by rice breeders/geneticists/molecular biologists becomes combined in databases with that generated by researchers studying other cereals. Rice research will therefore be of interest to all cereal breeders/geneticists/molecular biologists. This Edition reviews the current state of knowledge of its genome, genes, germplasm collections, trait analysis, breeding systems, mutator systems, transformation and diseases.

Few Americans identify slavery with the cultivation of rice, yet rice was a major plantation crop during the first three centuries of settlement in the Americas. Rice accompanied African slaves across the Middle Passage throughout the New World to Brazil, the Caribbean, and the southern United States. By the middle of the eighteenth century, rice plantations in South Carolina and the black slaves who worked them had created one of the most profitable economies in the world. Black Rice tells the story of the true provenance of rice in the Americas. It establishes, through agricultural and historical evidence, the vital significance of rice in West African society for a millennium before Europeans arrived and the slave trade began. The standard belief that Europeans introduced rice to West Africa and then brought the knowledge of its cultivation to the Americas is a fundamental fallacy, one which succeeds in effacing the origins of the crop and the role of Africans and African-American slaves in transferring the seed, the cultivation skills, and the cultural practices necessary for establishing it in the New World. In this vivid interpretation of rice and slaves in the Atlantic world, Judith Carney reveals how racism has shaped our historical memory and neglected this critical African contribution to the making of the Americas.

During the last nine millennia or so, man has improved the rice plant, increased its productivity and has found various uses of its parts. The story of rice differs from region to region and has been different in different periods of time. There was a time when tax was collected in the form of rice in Japan, the Southeast Asian kingdoms created hyd