HETEROSIS AND EVOLUTION
نویسندگان
چکیده
منابع مشابه
Heterosis: Theory and Estimation
Heterosis is the foundation of modern maize breeding programs. Despite its importance in maize production, we know surprisingly little about the genetic basis of heterosis. Shull (1952) coined the term heterosis and defined it as: "... the interpretation of increased vigor, size, fruitfulness, speed of development, resistance to disease and to insect pests, or to climatic rigors of any kind, ma...
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M A N Y hybrids between genetic pure lines in maize exhibit heterosis. The search for the genetic basis of heterosis has been carried on for many years and by many workers. Despite these efforts, an adequate, specific biochemical explanation of heterosis has not been presented. JONES (1952) has noted the interaction of nuclear genes and cytoplasm, as evidenced by differences in reciprocal cross...
متن کاملWhat Is “ Heterosis ” ? L
T IS not my purpose in this paper to present or to discuss the actual basic I causes or the fundamental mechanisms which bring about the increased size, the excessive kinetic energy, the increased productiveness, resistance to disease or to unfavorable conditions of the environment, the “stimulating effects of hybridity,” the so-called “hybrid vigor” of English writers and “Luxurieren” of many ...
متن کاملHeterosis resulting from degenerative changes.
ERITABLE variations in inbred strains of maize occur infrequently. All H the mutations BO far found either do not increase the amount of growth and productiveness or clearly reduce the plants in some degree (JONES 1924, 193a, 1944; SINGLETON 1943). Several changes have been noted recently and reported in a preliminary way (JONES 1944) which reduce the vigor of the inbred plants but which increa...
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abstract because of the many geopolitical, geo economical and geo strategically potentials and communicational capabilities of eco region, members can expand the convergence and the integration in base of this organization that have important impact on members development and expanding peace in international and regional level. based on quality analyzing of library findings and experts interv...
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ژورنال
عنوان ژورنال: Evolution
سال: 1953
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1953.tb00064.x