Genome composition, stability and fertility of hexaploid alloploids between Triticum turgidum var. carthlicum and Leymus racemosus.
Hexaploid alloploids between the tetraploid wheat Triticum carthlicum and the perennial tetraploid Leymus racemosus were analysed for chromosome composition and cytogenetic stability. GISH analysis showed different lines to have from 11 to 16 Leymus chromosomes. The alloploids showed a relatively high frequency of univalents in meiotic metaphase and of aneuploid plants and hence they are not stable. The seedset is lower than in wheat, but high enough to secure a safe propagation and preservation. The alloploids are discussed in relation to widening the genetic variation of breadwheat and wheat breeding.
Ellneskog-Staam
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Department of Crop Science, Swedish University of Agricultural Sciences, Alnarp, Sweden. Pernilla.Ellneskog@vv.slu.se
Merker
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D002875:Chromosomes / Q000648:ultrastructure; D002523:Edible Grain / Q000235:genetics*; D005298:Fertility; D018745:Genome, Plant; D006824:Hybridization, Genetic; D017404:In Situ Hybridization, Fluorescence; D008540:Meiosis; D011003:Ploidies; D012639:Seeds; D013045:Species Specificity; D014908:Triticum / Q000145:classification / Q000235:genetics*