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Crosses between Hordeum Jubatum L. and Taeniatherum Asperum (Sim.) Nevski to Determine Genomic Relationships
Author(s) -
Schooler A.B.,
Bell A.R.,
Nalewaja John D.
Publication year - 1972
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/cropsci1972.0011183x001200040051x
Subject(s) - biology , hybrid , meiosis , chromosome , hordeum vulgare , genetics , hordeum , ploidy , botany , genome , poaceae , gene
F l hybrids were obtained from crosses between Hordeum jubatum L. (2n=28) and Taeniatherum asperum (Sim.) Nevski (2n=14). The F 1 hybrids had a chromosome complement of 2n=21 and were self‐sterile. Chromosome behavior was irregular in microsporocytes of the hybrids examined. Chromosome doubling was induced in F l hybrids by colchicine treatment and partially selffertile amphiploid intergeneric hybrids (2n=42) were produced. Cytological observations showed many micronuclei in the microspores which resulted from chromosome fragmentation during meiosis II. The F 1 intergeneric hybrids and amphiploid resembled the Hordeum parent more closely than Taeniatherum but were smaller than either parent in most morphological characteristics. There was only slight evidence of a genome relationship between the two genera.