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Production of F1 hybrids using ethrel-induced male sterility in Indian mustard (Brassica juncea (L.) Coss.)

Published online by Cambridge University Press:  27 March 2009

S. S. Banga  and
K. S. Labana
S. S. Banga
Affiliation:
Department of Plant Breeding, Punjab Agricultural University, Ludhiana, India
K. S. Labana
Affiliation:
Department of Plant Breeding, Punjab Agricultural University, Ludhiana, India
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Summary

The effect of field layout and the orientation of seed-production blocks on outcrossing rates was investigated in Indian mustard. The study incorporated three male:female combinations, i.e. 1:2, 1:3 and 2:4 laid in east–west, north–south and circular directions. The experimental material consisted of four test cultivars (RLM 198, RLM 514, Varuna and TM 4) in a split-plot design. Male sterility was achieved by spraying 0·25% (v/v) ethrel twice before the emergence of the first flowering shoots. The proportion of hybrid seed set was maximal in the 2:4 combination in a circular design. Outcrossing varied from 19 to 79%. Heterosis was evident in yield trials, but F1 hybrids showed carry-over effects due to ethrel treatment. It is argued that ethrelinduced male sterility has only a limited role in screening parental combinations for their yield assessment.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 101 , Issue 2 , October 1983 , pp. 453 - 455
Copyright
Copyright © Cambridge University Press 1983

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References

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