Document Type
Thesis - Open Access
Award Date
1953
Degree Name
Master of Science (MS)
Department / School
Agronomy
Abstract
The induction or true breeding variants with unchanged chromosome member in a variety of Sorghum vulgare Pers. was reported by Franske and Rosa (5). These variants resulted from colchicina treatment of seedlings in a variety which was we known to breed true. The authors proposed that variant plants lmay have originated from a haploid chromosome complement formed bysomatic reduction, which was later restored to the diploid condition. Such a cell by virtue of its genetic constitution or its position in the meristomatic region may be able to initiate a s new growing point having homozygous diploid tissue. This proposal in itself does not explain the variation in plant type from the untreated full sib.These deviations may have arisen from chromosomal aberration in the form of deletions, inversions or translocation within the chromosome coomplanent. To determine it these chromosomal aberrations occurred a cytological study was made of the meiotic behavior 1n treated and untreated full sibe and F1 hybrids involving variants induced by colchicine treatment.
Library of Congress Subject Headings
Sorghum -- Varieties Colchicine
Description
Includes bibliographical references
Format
application/pdf
Number of Pages
46
Publisher
South Dakota State University
Rights
No Copyright - Non-Commercial Use Only
http://rightsstatements.org/vocab/NoC-NC/1.0/
Recommended Citation
Harpstead, Dale D., "The Nature of Chromatin Changes in Colchicine-induced Variants in Sorghum" (1953). Electronic Theses and Dissertations. 2250.
https://openprairie.sdstate.edu/etd/2250