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Horizontal Resistance
In genetics, the term horizontal resistance was first used by J.E. VanderplankVanderplank, J.E. (1963) Plant Diseases: Epidemics and Control. Academic Press, New York and London, 349pp. to describe many-gene resistance, which is sometimes also called generalized resistance. This contrasts with the term vertical resistance The term vertical resistance, used commonly in context of plant selection, was first used by J.E. VanderplankVanderplank, J.E. (1963) Plant Diseases: Epidemics and Control. Academic Press, New York and London, 349pp. to describe single-gene resistan ... which was used to describe single-gene resistance. Raoul A. Robinson Robinson, Raoul A. (1976) Plant Pathosystems. Springer-Verlag, Berlin, Heidelberg, New York, 184pp. further refined the definition of horizontal resistance. Unlike vertical resistance and parasitic ability, horizontal resistance and horizontal parasitic ability are entirely independent of each other in genetic terms. In the first round of breedin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetics
Genetics is the study of genes, genetic variation, and heredity in organisms.Hartl D, Jones E (2005) It is an important branch in biology because heredity is vital to organisms' evolution. Gregor Mendel, a Moravian Augustinian friar working in the 19th century in Brno, was the first to study genetics scientifically. Mendel studied "trait inheritance", patterns in the way traits are handed down from parents to offspring over time. He observed that organisms (pea plants) inherit traits by way of discrete "units of inheritance". This term, still used today, is a somewhat ambiguous definition of what is referred to as a gene. Trait inheritance and molecular inheritance mechanisms of genes are still primary principles of genetics in the 21st century, but modern genetics has expanded to study the function and behavior of genes. Gene structure and function, variation, and distribution are studied within the context of the cell, the organism (e.g. dominance), and within the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vertical Resistance
The term vertical resistance, used commonly in context of plant selection, was first used by J.E. VanderplankVanderplank, J.E. (1963) Plant Diseases: Epidemics and Control. Academic Press, New York and London, 349pp. to describe single-gene resistance. This contrasted the term horizontal resistance which was used to describe many-gene resistance. Raoul A. Robinson Robinson, Raoul A. (1976) Plant Pathosystems. Springer-Verlag, Berlin, Heidelberg, New York, 184pp. further refined the definition of vertical resistance, emphasizing that in vertical resistance there are single genes for resistance in the host plant, and there are also single genes for parasitic ability in the parasite. This phenomenon is known as the gene-for-gene relationship The gene-for-gene relationship was discovered by Harold Henry Flor who was working with rust (''Melampsora lini'') of flax ('' Linum usitatissimum''). Flor showed that the inheritance of both resistance in the host and parasite ability to cause d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raoul A
__NOTOC__ Raoul is a French variant of the male given name Ralph or Rudolph, and a cognate of Raul. Raoul may also refer to: Given name * Raoul Berger, American legal scholar * Raoul Bova, Italian actor * Radulphus Brito (Raoul le Breton, died 1320), grammarian * See Lament for the Makaris for Roull of Corstorphin and Roull of Aberdene; fifteenth-century poets * Raoul de Godewaersvelde, French singer * Rudolph, Duke of Burgundy; also known as Raoul, Duke of Burgundy (and later king of the Franks), son of Richard of Autun * Raoul Heertje, Dutch stand-up comedian * Raoul Moat, English fugitive and gunman at the centre of the 2010 Northumbria Police manhunt * Raoul of Turenne or Saint-Raoul, archbishop of Bourges, 840–866 * Raoul (founder of Vaucelles Abbey) or Saint Raoul * Raoul Wallenberg, Swedish humanitarian * Raoul Walsh (1887–1980), film director * Raoul, alleged conspirator in the assassination of Martin Luther King Jr. Surname * Raoul (Byzantine family), Byzantine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytopathology
Plant pathology (also phytopathology) is the scientific study of diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). Organisms that cause infectious disease include fungi, oomycetes, bacteria, viruses, viroids, virus-like organisms, phytoplasmas, protozoa, nematodes and parasitic plants. Not included are ectoparasites like insects, mites, vertebrate, or other pests that affect plant health by eating plant tissues. Plant pathology also involves the study of pathogen identification, disease etiology, disease cycles, economic impact, plant disease epidemiology, plant disease resistance, how plant diseases affect humans and animals, pathosystem genetics, and management of plant diseases. Overview Control of plant diseases is crucial to the reliable production of food, and it provides significant problems in agricultural use of land, water, fuel and other inputs. Plants in both natural and cultivated populatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
