1. Genetic Analysis of Some Chemotypes in Ocimum basilicum var. <em>glabratum</em>.
- Author
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Gupta, S. C.
- Subjects
- *
BASIL , *LAMIACEAE , *BREEDING - Abstract
Screening of a population of Ocimum basilicum var. glabratum Benth., raised from seeds collected from France, West Africa and Kerala (India) was carried out for chemical composition of its essential oils. In all three collections, plants were found to be comprised of 3 chemotypes which were morphologically indistinguishable, but each chemotype was found to be capable of intercrossing freely with the other two. Selfing was carried out during 4 consecutive generations, after which three pure lines were established. Study of the selfed progeny of each collection exhibited an interesting segregation in S[Sub2] and S[Sub3] generations. Along with segregation in F[Sub2] and F[Sub3] generations of various hybrids the results can be explainedby assuming a gene '&MDline; existing in 3 (or more) allelic forms: The allele M[Sub0]&Dline; for biosynthesis of estragole (methyl chavicol) is dominant to alleles M[Sub1]&Dline; for eugenol and M[Sub2]&Dline; for camphor. Also, allele M[Sub1]&Dline; is dominant to allele M[Sub2]&Dline;. The assumption was further confirmed by testcrosses of F[Sub1] hybrids of each cross with their recessive parent. [ABSTRACT FROM AUTHOR]
- Published
- 1994
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