Corn Breeding: Types of Cultivars
This is the third in a series of lessons specifically designed to instruct individuals without any formal training in genetics or statistics about the science of corn breeding. Individuals with formal training in genetics or statistics but without any training in plant breeding also may benefit from taking these lessons.
Overview and Objectives
Associate Professor, Department of Agronomy and Horticulture at University of Nebraska Lincoln, USA
Graduate Student, Department of Agronomy and Horticulture at University of Nebraska Lincoln, USA
A cultivar is a plant variety that has been developed for a specific use, such as production of grain. The most common type of corn cultivar grown today and since the middle of the 20th century by U.S. farmers is the single-cross hybrid. In the 1930’s and 1940’s, double-cross hybrids were more prevalent. Before double-cross hybrids, farmers raised open-pollinated varieties. In this lesson, the development and production of these and other types of corn cultivars will be described. The advantages and disadvantages of types of cultivars other than single-cross hybrids that could be grown by farmers also will be discussed. The lesson begins with a brief description of genes and alleles, which will be helpful in understanding some of the differences among types of cultivars.
At the completion of this lesson you will be able to
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