Open AccessBarley × rye hybrids eliminating accessory chromosomes of rye
Author(s) -
LINDELAURSEN IB
Publication year - 1991
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1991.tb03546.x
Subject(s) - biology , hybrid , chromosome , meiosis , ploidy , genetics , b chromosome , karyotype , botany , gene
Eighty‐six emasculated spikes of 5 barley varieties were pollinated by ‘Transbaikal’ rye carrying 2 to 6 B chromosomes. Five F 1 plants survived to be chromosome‐counted. Two of them were barley haploids (2n = 7) and three were barley × rye hybrids. Two of the hybrids withered away before producing spikes. The chromosomal constitution of the hybrids was analysed at intervals using Giemsa C‐banding. Basically, the hybrids had a full barley and a full rye genome. At the seedling stage (7 weeks after crossing), some cells of one hybrid carried one rye standard B chromosome in addition, and some cells of two hybrids carried one or two long arm rye iso‐B chromosomes in addition. Three months after crossing, all rye B chromosomes were eliminated. Both mitotic and meiotic cells showed variability for the number of rye A chromosomes. It will hardly be possible to incorporate rye B chromosomes permanently in barley.