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Document Type

Thesis - University Access Only

Award Date

1989

Degree Name

Master of Science (MS)

Department

Agronomy

First Advisor

Fred A. Cholick

Abstract

Increased productivity of cultivated crops is the major objective of breeding programs worldwide. Developing cultivars with disease or insect resistance, physiological efficiency, wide adaptation, and many other characteristics in the plant, have contributed to breeder’s success in increasing yield. Actually, there are indications that increases in yield due to breeding are not as great as they were in the past, and there are discussions on yield plateau for our major crops. Wheat is the most widely produced cereal and, therefore, grown under a wide array of environmental conditions. An extremely diverse collection of cultivars, experimental lines, and wild types are available to breeders to improve their germplasm and breeding effort. The intercrossing of different gene pools is becoming a common practice. Often the plant introductions are non-adapted or poor agronomic types but have desirable characteristics. Several methods have been proposed to introduce this new germplasm to adapted genotypes. Thus, the objectives of the present study are to: 1) Compare means and variances of three different types of crosses to introduce non-adapted germplasm. 2) Detect differences among generations in unselected bulks for each type of cross. 3) Determine the ability of a generation to predict the performance of successive generations in the different crosses. 4) Compare the progeny of each kind of cross and determine which type of cross produces superior progeny.

Library of Congress Subject Headings

Wheat -- Genetics

Wheat -- Germplasm resources

Format

application/pdf

Number of Pages

124

Publisher

South Dakota State University

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