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The Journal of Heredity 1984:75(5):407-410
© 1984 The American Genetic Association 75:407-410

research-article

Inheritance of bolt resistance in an interspecific cross of Brassica species

Brassica napus L. x B. campestris L. ssp. pekinensis

C. E. Mero, and S. Honma

Department of Horticulture, Michigan State University East Lansing, MI 48824

Abstract

The inheritance of bolting in Chinese cabbage (Brassica campestris L. ssp. pekinensis) was investigated by hybridizing Chinese cabbage with kale (B. napus L.). Segregation for bolting response in crosses of kale and three Chinese cabbage cultivars suggested bolting response was conditioned by a few major genes and that the percent of bolters was dependent on the Chinese cabbage cultivar used. Differences in chromosome number between Chinese cabbage (n = 10) and kale (n = 19) produced varying degrees of fertility in the progeny and affected the segregation ratios for bolting. The observed seg regation ratios appear to have resulted from variable ploidy and random assortment of chromosomes carrying genes for vernalization requirement.


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