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Registration of Two Winter Wheat Disomic Whole Chromosome Substitution Germplasm Lines
Author(s) -
MacDonald Malcolm D.
Publication year - 1987
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1987.0011183x002700050079x
Subject(s) - germplasm , substitution (logic) , citation , winter wheat , library science , chromosome , biology , horticulture , computer science , linguistics , agronomy , philosophy , genetics , gene
Two WINTER WHEAT (Triticum aestivum L.) disomic whole chromosome substitution lines 'Winalta'-'Rescue' 5A (WR5A) (Reg. no. GP-283) (PI 508275) (PGRC 16481) and 'Kharkov 22MC'-'Rescue' 5A (K-R5A) (Reg. no. GP-284) (PI 508276) (PGRC 16480) were developed by the Agriculture Canada Research Station, Lethbridge, Alberta, following procedures outlined by Unrau et al. (4). These lines were released 17 Feb. 1984. Since the marker gene B, a dominant inhibitor of awns (1), is on chromosome 5 A of the spring wheat cultivar Rescue, it was not necessary to self-pollinate the male parents in the seven backcrosses to produce the substitution lines. The monosomic substitution lines were also verified following the final backcrosses to their respective recurrent parents by test crosses to ditelosomic tester stock (3). Development of the substitution line W-R5A was conducted concurrently with the production of its recurrent parent Winalta monosomic 5A (W5A). Line W5A was produced from an initial cross of the spring wheat 'Cadet' monosomic for chromosome 5A and Winalta with seven backcrosses by Winalta. Seed of the monosomic 5 A line of Kharkov 22MC, the recurrent parent in producing the substitution line KR5A, came from the University of Alberta. The substitution lines were developed initially to study the inheritance of cold resistance associated with chromosome 5A. They have also been found useful in investigating the Vrn{ gene (2). Small amounts of seed of the disomic substitution lines K-R5A and W-R5A are available from the Central Office for the Plant Gene Resources of Canada, Plant Research Center, Ottawa, Ontario, Canada K1A OC6.