Seed and propagules
Since the Ocimum species are generally highly cross-pollinated, a certain amount of heterozygosity is essential for vigorous growth, high oil yield and high-quality oil. These characteristics are mostly controlled by polygenes whose effect is mostly additive. The seeds are therefore likely to deteriorate in future generations unless the selected lines from which the polycross seed is produced are maintained. It is also crucial that fresh seed is collected from the polycross lines each time. For fresh plantings, the growers must take fresh seeds from the pedigree stock. Selected lines can be multiplied vegetatively by growing tender shoot tips. Good-quality planting seeds can be obtained from reputed seed companies