Somatic cell hybridization of 'oxy' CMS Brassica juncea (AABB) with B. oleracea (CC) for correction of chlorosis and transfer of novel organelle combinations to allotetraploid brassicas

Alloplasmic lines of cultivated Brassica species with B. oxyrrhina cytoplasm are male-sterile and suffer from severe chlorosis. We developed male-sterile lines corrected for chlorosis by fusing protoplasts of CMS B. juncea (AABB) with 'oxy' cytoplasm and normal B. oleracea (CC). A large nu...

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Bibliographic Details
Published in:Theoretical and applied genetics 2000-05, Vol.100 (7), p.1043-1049
Main Authors: ARUMUGAM, N, MUKHOPADHYAY, A, GUPTA, V, SODHI, Y. S, VERMA, J. K, PENTAL, D, PRADHAN, A. K
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Bats
Biological and medical sciences
Brassica juncea
Brassica oleracea
Chlorophyll
Chloroplasts
chlorosis
Classical genetics, quantitative genetics, hybrids
Cytoplasm
cytoplasmic male sterility
Fundamental and applied biological sciences. Psychology
Genetics and breeding of economic plants
Genetics of eukaryotes. Biological and molecular evolution
Genomes
Heterosis. Floral biology applications: apomixy, male sterility, incompatibility, varia
Hybridization
Plant breeding: fundamental aspects and methodology
Pteridophyta, spermatophyta
recombination
Seeds
Vegetals
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Summary:Alloplasmic lines of cultivated Brassica species with B. oxyrrhina cytoplasm are male-sterile and suffer from severe chlorosis. We developed male-sterile lines corrected for chlorosis by fusing protoplasts of CMS B. juncea (AABB) with 'oxy' cytoplasm and normal B. oleracea (CC). A large number of male-sterile AABBCC somatic hybrids with desirable organelle combinations, i.e. chloroplasts of B. oleracea and mitochondria with recombinant genomes, were recovered. While no recombination was observed in the chloroplast genome, the mitochondrial genome showed extensive recombination that resulted in the appearance of totally novel banding patterns in some of the hybrids. Hybrids with a parental-type mitochondrial genome as well as recombinant patterns close to either of the parental types were also obtained. Using AABBCC somatic hybrids as bridging material, we transferred the desirable organelle combinations to B. juncea (AABB), B. napus (AACC), and B. carinata (BBCC). Many of these lines are now at advanced stages of backcrossing and show stable inheritance of the CMS character and do not suffer from chlorosis.[PUBLICATION ABSTRACT]
ISSN:0040-5752
1432-2242
DOI:10.1007/s001220051385