In the early 20th century, biologists began to apply this effect to agriculture by creating naturally-born parent plants that produced hybrid seeds. By the 1940s, almost every farmer in the United States was planting hybrid corn, and the harvests multiplied. Biologists have ...
In 1964 , he happened to find a natural hybrid rice(杂交水稻)plant that had great advantages over others. Yuan was excited about his discovery. He then began to study the parts of this unusual plant. In 1973, he started to develop a type of hybrid rice species(种类). It produced 20%...
综观全文,尤其是根据第三段He began working on corn in 1905.Following Gregor Mendel's example,Shull obtained purebred(纯种的) strains of corn through self-pollination.The purebred strains were less healthy and productive,but when he crossed the purebred strains,the hybrid yields ...
Kellogg's Corn Flakes This iconic breakfast cereal was originally (and accidentally) created as part of the vegetarian diet for the elite clientele of the Battle Creek Sanitarium, a world-renowned health resort in the Michigan city of the same name. The sanitarium's clients reportedly included su...