A Database for Triticeae and Avena
II. 29. Haploid production in Hordeum spontaneum x H. bulbosum
E. Simpson and J.W. Snape, Plant Breeding Institute, Trumpington, Cambridge,
Natural populations of Hordeum spontaneum undoubtedly contain
genetical variation which could be usefully exploited in barley breeding
programmes. One method of rapidly exploiting such variation might be to
utilize the H. bulbosum technique to produce doubled haploid lines
from H. spontaneum x H. vulgare hybrids. The present
note reports a pilot study carried out to determine the extent of crossability
between H. spontaneum and H. bulbosum and to examine, if
crossing takes place, the frequencies of haploids produced from plants
of natural populations of H. spontaneum from Israel. These form
part of a collection obtained from Professor A. Dinoor of the Hebrew University,
Jerusalem, which was partly sponsored by the Agricultural Research Council
of Great Britain.
Three spring populations were examined and plants of these were crossed
as female with the same genotype of diploid H. bulbosum. The overall
frequencies obtained are shown in Table 1 and indicate that embryos were
readily obtained from all genotypes. All were haploid H. spontaneum
plants. Although the data were limited they also indicated that there might
be variation between populations in their ability to produce embryos. However,
no crossability problems were experienced suggesting that hybrids of H.
spontaneum with H. vulgare should be capable of producing haploids
when crossed with H. bulbosum.
Table 1. Embryos produced from crosses between H.
spontaneum and diploid H. bulbosum.
BGN 10 toc
BGN Main Index