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SYNTHETIC HYBRIDS OF HORDEUM BOGDANII WITH ELYMUS CANADENSIS AND SITANION HYSTRIX
Author(s) -
Dewey Douglas R.
Publication year - 1971
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1971.tb10045.x
Subject(s) - biology , elymus , hybrid , hystrix , triticeae , botany , chromosome , genome , meiosis , agropyron , ploidy , genetics , poaceae , gene
Seven viable hybrid seeds were obtained from 48 hand‐emasculated Elymus canadensis L., 2n = 28, florets pollinated by Hordeum bogdanii Wilensky, 2n = 14. The hybrids were large, vigorous, and completely sterile plants that bore a closer morphological resemblance to E. canadensis than to H. bogdanii . Chromosome associations in the 21‐chromosome hybrids averaged 9.98 I , 5.40 II , and 0.08 III in 264 metaphase‐I cells. Chromosome pairing was attributed to allosyndetic pairing between E. canadensis and H. bogdanii chromosomes. The H. bogdanii genome appears to be partially homologous with one of the two E. canadensis genomes. One Sitanion hystrix (Nutt.) J. G. Smith X H. bogdanii hybrid was obtained from a cross involving 37 emasculated S. hystrix florets. This triploid, 2n = 21, hybrid was morphologically intermediate between the parents and totally sterile. Averages of 9.09 I , 5.72 II , and 0.16 III were observed in 106 cells at metaphase I. A modified form of the H. bogdanii genome appears to occur in S. hystrix as well as in E. canadensis . Many allotetraploid Agropyron, Elymus , and Sitanion species apparently contain a genome derived from Hordeum .