ISSN:
1432-2242
Keywords:
Gametoclonal variation
;
Barley doubled haploids
;
Wheat doubled haploids
;
Hordeum bulbosum
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary To investigate whether the Hordeum bulbosum system of doubled haploid production generates gametoclonal variation, populations of second generation doubled haploid lines were developed from first generation doubled haploid lines of two barley varieties and three wheat genotypes. In barley, no variation between doubled haploids from doubled haploids was detected for a range of quantitative characters, suggesting the absence of any gametoclonal effects. However, the original selfed-seed stocks were shown to contain cryptic allelic variation for some of the characters investigated. In wheat, gametoclonal variation was detected for ear emergence time, plant height and yield, and its components for two out of the three genotypes investigated. The type and range of variation was similar to that reported from studies of somaclonal variation from immature embryos and gametoclonal variation from anther culture. Generally, the effects appeared to reduce the yield performance of individual lines. The difference in response between the two species and the consequences for the use of the doubled haploid system in breeding programmes are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00276758
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