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GENOME RELATIONS OF AGROPYRON SERICEUM, HORDEUM JUBATUM AND THEIR HYBRIDS
Author(s) -
Murry Lynn E.,
Tai William
Publication year - 1980
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.1537-2197.1980.tb07769.x
Subject(s) - biology , genome , pairing , hybrid , chromosome pairing , genetics , agropyron , endosymbiosis , botany , gene , chloroplast , plastid , superconductivity , physics , quantum mechanics
Cytogenetic investigation of microsporogenesis in Agropyron sericeum, Hordeum jubatum , their spontaneous hybrid, Agrohordeum pilosilemma , its amphiploid, and the backcross of the amphiploid to A. sericeum , B 1 , elucidated the genome relationships of A. sericeum and H. jubatum . The tetraploid parental species share a partially homologous genome which affects the pairing relationships evidenced in their hybrids. The genome formulae assigned to these plants are: A. sericeum , A“A”BB; H. jubatum , AAA'A‘; Agrohordeum pilosilemma , AA'A“B; the amphiploid, AAA'A‘A”A“BB; and B 1 , AA'A”A“BB. Observed pairing configurations were compatible with the expected maximum pairing configurations predicted under the assumption of genetic control of pairing with dosage effects. This is interpreted as further support for the hypothesis that pairing in the hybrids of H. jubatum is controlled by the A genome, one dose of A allowing homeologous pairing and two doses of A promoting homeologous association.