The study of the morphological features of the mid-prophase chromosomes of the microspore-mother-cells of maize was initiated thirtyfive years ago, when it was found that aceto-carmine stained the chromosomes at this early ...

An understanding of the fundamental nature of gene action involved in the phenomenon or heterosis and in the inheritance of quantitative characters in general is very important to the plant breeder. Although many questions ...

Adaptation is perhaps the most elusive concept in plant breeding. Not only is there surprisingly little information concerning the performance of varieties over a broad range of environments in even the major crop plants, ...

There is no general overproduction of wheat in the world today. However, since the termination of World War II a few countries, such as the U.S.A., Canada, Australia and Argentina, either temporarily or over a period of ...

As farmers make the transition from traditional to modern agriculture their total operation changes. One of the important decisions they have to make during this period is which fertilizer to apply and how much. An important ...

Due to their low lysine content, the cereal grains are generally considered of reduced nutritional quality in comparison to other protein sources. In maize, a~ second diet limiting amino acid is tryptophan. That increases ...

The cooperative Food and Agriculture Organization-Rockefeller Foundation, Near East-American Spring Wheat Yield Nursery originated as an outgrowth of a recommendation made by Dr. Jose Vallega (formerly with the Ministry ...

Prior to 1960. a number of scientists who had had occasion to stqdy uniform sets of material such as the International Rust Nursery of the United States Department of Agriculture. noticed that, apart from disease reaction. ...

The decision of greatest economic importance that farmers have to make in using fertilizers is the selection of the fertilizer treatment to employ. T f the treatment selected includes an element that is not needed or a ...