Marijuana Botany by Robert Connell Clarke Hybrid Drug Phenotypes Creeper Phenotype This phenotype has appeared in several domestic Cannabis crops and it is a frequent phenotype in certain hybrid strains.…

Marijuana Botany by Robert Connell Clarke Phenotypes and Characteristics of Imported Strains Following is a list of gross phenotypes and characteristics for many imported strains of Cannabis. Fiber Strain Gross…

Marijuana Botany by Robert Connell Clarke Gross Phenotypes of Cannabis Strains The gross phenotype or general growth form is determined by size, root production, branching pattern, sex, maturation, and floral…

Marijuana Botany by Robert Connell Clarke Floral Traits Many individual traits determine the floral characteristics of Cannabis This section will focus on the individual traits of pistillate floral clusters with…

Marijuana Botany by Robert Connell Clarke Fiber Traits More advanced breeding has occurred in fiber strains than any other type of Cannabis. Over the years many strains have been developed…

Marijuana Botany by Robert Connell Clarke Leaf Traits Leaf traits vary greatly from strain to strain. In addition to these regularly occurring variations in leaves, there are a number of…

Marijuana Botany by Robert Connell Clarke Seedling Traits Seedling traits can be very useful in the efficient and purposeful selection of future parental stock. If accurate selection can be exercised…

Marijuana Botany by Robert Connell Clarke General Traits Size and Yield The size of an individual Cannabis plant is determined by environmental factors such as room for root and shoot…

Marijuana Botany by Robert Connell Clarke Genotype and Phenotype Ratios It must be remembered, in attempting to fix favorable characteristics, that a monohybrid cross gives rise to four possible recombinant…

Marijuana Botany by Robert Connell Clarke Fixing Traits Fixing traits (producing homozygous offspring) in Cannabis strains is more difficult than it is in many other flowering plants. With monoecious strains…

Marijuana Botany by Robert Connell Clarke Acclimatization Much of the breeding effort of North American cultivators is concerned with acclimatizing high-THC strains of equatorial origin to the climate of their…

Marijuana Botany by Robert Connell Clarke Breeding All of the Cannabis grown in North America today originated in foreign lands. The diligence of our ancestors in their collection and sowing…

Marijuana Botany by Robert Connell Clarke Polyploidy Polyploidy is the condition of multiple sets of chromosomes within one cell. Cannabis has 20 chromosomes in the vegetative diploid (2n) condition. Triploid…

Marijuana Botany by Robert Connell Clarke Genetics Although it is possible to breed Cannabis with limited success without any knowledge of the laws of inheritance, the full potential of diligent…

Marijuana Botany by Robert Connell Clarke Pruning Pruning techniques are commonly used by Cannabis cultivators to limit the size of their plants and promote branching. Several techniques are available, and…