The Development of deficient aneuploids in durum wheat
Date
1953
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
ORCID
Type
Degree Level
Masters
Abstract
Deficient1 aneuploids are proving of great value
in the systematic genetic analysis of Triticum
aestiyum L. emend.
Fiori et Paoletti (=T.vulgare)
(2n = 42). More and more wheat breeders and geneticists are utilizing the monosomic
(20" + 1') and nullisomic (20") lines developed by Dr. E.R. Sears
in the variety Chinese Spring. These aneuploids, by providing a means of associating
genes with cerrain chromosomes, have simplified inheritance studies in the hexaploid
wheats. Moreover they make possible the controlled synthesis of new varieties since specific
chromosomes from other varieties, species or even genera may be substituted for the deficient one.
The development of a monosomic or nullisomic series in the emmer wheats would aid greatly in
the genetic study of that group. A program is underway at the University of Saskatchewan to develop
such a series in T. durum
Desf. var. Golden Ball (2n = 28). this program involves the use of deficient Chinese Spring lines as
well as irradiation methods.
The material for the present paper was obtained from the aforementioned program. Information is presented
showing that it may be very difficult, if not impossible, to obtain deficient lines in Golden Ball.
1Monosomic and nullisomic plants having respectively one or both
members of a single chromosome pair missing are referred to as deficient
aneuploids. In contrast, plants having a certain chromosome represented more than twice
(trisomes and tetrasomes) are referred to as duplicated aneuploids.
Description
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Citation
Degree
Master of Science (M.Sc.)
Department
Field Husbandry
Program
Field Husbandry