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Filtering by: Advisor Kronstad, Warren E. Remove constraint Advisor: Kronstad, Warren E. Decade 1980-1989 Remove constraint Decade: 1980-1989 Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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A study of methods of parental evaluation using testers to predict subsequent progeny performance in winter wheat (Triticum aestivum L.)

Creator:

Alexander, William Larry

Abstract:

The major objective of this study was to determine why certain winter wheat cultivars, when hybridized, will produce a greater proportion of desirable plants in subsequent, segregating generations. Three winter wheat parents were chosen as the experimental material, based on their known performance as parents. Yamhill and Pullman Selection 101...

Resource Type:

Dissertation
Nature of inheritance, genotype-environment interaction and association of selected agronomic characters in crosses of winter X spring wheats (triticum aestivum L. em Thell)

Creator:

Brajcich, P.

Abstract:

This investigation was motivated by the apparent increase in genetic variability resulting from the systematic combining of gene pools represented by winter and spring types of wheats. It was the objective of this study to provide information regarding the nature of this genetic variability for nine agronomic characters in populations...

Resource Type:

Dissertation
Inheritance and associations of six agronomic traits and stem-base carbohydrate concentration on ratooning ability in rice (Oryza sativa, L.)

Creator:

Cuevas-Pérez, Federico E.

Resource Type:

Dissertation
Methods of evaluation, effects of intermating and results of one cycle of S₁ family recurrent selection in barley

Creator:

Mareck, James

Abstract:

The focus of this study was to determine if S₁ family recurrent selection might be successfully used for barley improvement. Objectives were: 1) to identify suitable methods of evaluating grain yield in small plots, 2) to study the effects of intermating on mean values and variances of selected agronomic characters,...

Resource Type:

Dissertation
A comparison of two methods of divergent mass selection for heading date in two winter wheat (Triticum aestivum L. em Thell) crosses

Creator:

Frederickson, Leslie John

Abstract:

Responses to two cycles of mass selection for heading date, followed by selfing or intermating, were studied in two diverse winter wheat (Triticum aestivum L. em. Thell) crosses. Selection was bidirectional, resulting in early and late populations for each mating system, cycle, and cross. The influence of mass selection for...

Resource Type:

Dissertation
Influence of competition on combining ability estimates and subsequent prediction of progeny performance in wheat (Triticum aestivum L. em Thell.)

Creator:

Corral, Leonardo R.

Resource Type:

Dissertation
Assessment of resistance and inheritance to Barley Yellow Dwarf Virus disease (BYDV) in five wheat cultivars (Triticum aestivum L.)

Creator:

Tola, Jaime

Abstract:

Barley Yellow Dwarf Virus (BYDV) is a major disease of wheat. Unfortunately, unlike barley where the Yd2 gene provides adequate levels of resistance, the situation in wheat is more complex. This study was designed to provide information regarding: 1) evaluation of methods of measuring resistance among selected cultivars; 2) identification...

Resource Type:

Dissertation
Nature of inheritance and association of time, duration and rate of grain filling and subsequent grain yield in crosses of winter and spring wheats (Triticum aestivum L. em Thell)

Creator:

Choi, Byung Han

Abstract:

The nature of inheritance and possible associations for traits influencing earliness and grain yield were investigated using a four parent diallel of winter and spring wheat cultivars. More genetic variability was observed for the traits measured in segregating populations resulting from crosses between winter and spring type wheats in contrast...

Resource Type:

Dissertation
Identification and development of cultural practices for upland rice production systems for savanna soils of Colombia

Creator:

Leal-M, Dario

Abstract:

A great potential for increasing upland rice production exists in the savanna soils of Colombia. These vast areas are currently underutilized. However, they have good soil structure, flat topography, coupled with sufficient and well distributed rainfall, making savanna soils ideal for upland rice cropping system. The major constraints to upland...

Resource Type:

Dissertation
Response of grain yield, plant height and kernel weight in three winter wheat crosses (Triticum aestivum, L. em Thell) to different methods of selection

Creator:

Salmeron-Zamora, Jose Juan

Abstract:

This study was undertaken to see if a method of handling segregating populations could be employed which combined the positive attributes of the traditional pedigree and-bulk methods. Derived F₅ lines from the pedigree, bulk, and what is identified as a modified bulk method, were obtained from three winter wheat crosses....

Resource Type:

Dissertation

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Academic Affiliation

Crop Science17

Advisor

Kronstad, Warren E.[remove]18

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1980 to 1990

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Committee Member

McCuistion, Willis L.4
McCuistion, W. L.3
Allen, Thomas C.2
Broich, S.2
Fisher, Glenn2
more Committee Members »

Creator

Alexander, William Larry1
Berge Chandler, Sonja Kay1
Brajcich, P.1
Camacho Casas, Miguel Alfonso1
Choi, Byung Han1
more Creators »

Date

Date range begin – Date range end

Current results range from 1980 to 1989

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Decade

1980-1989[remove]18

Degree Field

Crop Science17
Genetics1

Degree Level

Doctoral18

Degree Name

Doctor of Philosophy (Ph.D.)[remove]18

Language

English [eng]18

Non-Academic Affiliation

Oregon State University. Graduate School18

Peer Reviewed

No18

Resource Type

Dissertation18

Rights Statement

Copyright Not Evaluated18

Subject

Wheat -- Genetics6
Wheat3
Winter wheat -- Genetics2
Abscisic acid1
Barley1
more Subjects »

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