debble
发表于 2025-3-25 04:59:08
Breeding Rice,oduction is concentrated in the rainy season and is grown in the dry season only if a supplemental water supply is available. In the temperate climates, and at high elevations, frost limits the length of the growing season and rice is grown as a summer crop.
引起痛苦
发表于 2025-3-25 11:28:38
Breeding Corn (Maize),sing number of important industrial products. Because of the important place of corn in U.S. agriculture, it is quite appropriate that the foremost contribution of U.S. scientists in plant breeding should be a system for breeding hybrid corn.
容易做
发表于 2025-3-25 14:22:30
Plant Breeders and Their Work, be increased greatly in the years ahead if the basic nutritional requirements of an explosive world population are to be satisfied (Fig. 1.1). Otherwise, the specter of hunger, malnutrition, and famine, already a reality with two-thirds of the world’s people, will continue to spread and grow, and t
Abrupt
发表于 2025-3-25 18:07:47
Reproduction in Crop Plants,rer as the breeding methods used with the various crop species are studied in more detail. It may be illustrated here quite simply by comparing two common crop plants, wheat and corn, which differ in their pollination method. In wheat, a self-pollinating crop, pollen normally fertilizes the flower i
Nomadic
发表于 2025-3-25 22:24:58
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Cursory
发表于 2025-3-26 04:09:41
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esculent
发表于 2025-3-26 07:23:51
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orient
发表于 2025-3-26 09:40:04
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围裙
发表于 2025-3-26 12:49:55
Fertility-Regulating Mechanisms and Their Manipulation,failure to be cross-fertile, depending upon the breeding system of the particular species involved, may curtail procedures for obtaining gene recombinations and limit seed production. Normally, self-pollinated species, such as wheat, oats, barley, rice, and soybeans, and some cross-pollinated specie
Acquired
发表于 2025-3-26 20:39:07
Plant Cell and Tissue Culture Applications in Plant Breeding,ere developed from Mendelian genetic principles and were expanded with developments in cytology, polyploidy, mutation induction, quantitative genetics, heterosis, male sterility, and related areas. In recent years a technology for genetic manipulation at the cellular level has emerged, which has a u