Patent Application
20200154623
Genus and species: Cannabis sativa.
Variety denomination: ‘MR2018003’.
This application claims the benefit of priority under 35 US.S.C 199(f) to Canadian Plant Breeders' Rights Application Number 18-9644, which was filed for the instant plant variety on Nov. 14, 2018.
The present invention relates to a new and distinct Cannabis (Cannabis sativa) cultivar designated as ‘MR2018003’.
‘MR2018003’ is a selection resulting from a controlled-cross made in in Markham, Ontario, Canada, between the female Cannabis sativa variety ‘Pakistan Chitral Kush Landrace’ and the male Cannabis sativa variety ‘UK Cheese’.
Seeds from the cross were sown in Markham, Ontario, Canada and plants were screened for a number of traits including tetrahydrocannabinol (THC) and cannabidiol (CBD) levels, yield, flowering time, disease resistance and flower morphology. An individual plant having about 16% THC and 0% CBD by dry weight and have significant resistance to microbial growth was chosen to be ‘MR2018003’.
In May 2016, ‘MR2018003’ was first asexually propagated by apical stem cuttings approximately 10 cm long and having multiple auxiliary meristems, in Markham, Ontario, Canada. ‘MR2018003’ is stable and reproduces true to type in successive generations of asexual reproduction.
This invention relates to a new and distinctive Cannabis cultivar designated as ‘MR2018003’.
‘MR2018003’ exhibits approximately 16% THC and 0% CBD by dry weight. ‘MR2018003’ also exhibits resistance to microbial growth, high yield and low intra-flower leaves.
The accompanying color photographs depict characteristics of ‘MR2018003’ as nearly true as possible to make color reproductions. The photographs are of plants aged 8 to 9 weeks post-floral transition and grown in flower rooms under standard cultivation methods in Bradford, Ontario Canada.
The following is a detailed description of the new cultivar ‘MR2018003’.
‘MR2018003’ has not been tested under all possible environmental conditions. Phenotypic differences may be observed with variations in environment without any variance in genotype.
The traits of ‘MR2018003’ have been repeatedly observed and represent the distinguishing characteristics of ‘MR2018003’.
The data that follows was collected in Markham, Ontario Canada and Bradford, Ontario, Canada from plants aged 8 to 9 weeks post-floral transition.
Plants were flowered under standard indoor environmental conditions with High Pressure Sodium lamps. Clones were cut from healthy mothers and allowed to roots for 14 to 18 days prior to being introduced to the flower room. The room was maintained at 18 hour days/6 hour nights for a week to allow the cuttings to establish adequate vegetative tissue. The floral transition was initiated by switching to 12 hour days and 12 hour nights. Flowering lasted 9 weeks before harvest, at which point morphological measurements were taken, samples were taken for chemical analysis, and yield was quantified.
Standard in-house developed nutrients were used throughout growth, and the plants were defoliated and pruned as necessary throughout the cycle.
In the following description, the color determination is in accordance with the 2017 Munsell Plant Tissue Color Book, except where general color terms of ordinary dictionary significance are used.
‘MR2018003’ may be compared with its parental lines with respect to THC content. ‘MR2018003’ exhibits 16.4% THC by dry weight, the female parent exhibits 12% THC by dry weight and the male parent exhibits 16% THC by dry weight.
The closest variety of Cannabis known to the inventors is the commercial variety ‘Girl Scout Cookies’. ‘MR2018003’ can be distinguished from ‘Girl Scout Cookies’ by its increased resistance to microbial growth, as shown in Table 2.
Variety ‘MR2018003’ can also be distinguished from the variety ‘Girl Scout Cookies’ with respect to the morphological traits shown the Table 3.
‘MR2018003’ also has a higher yield and fewer intra-flower leaves than ‘Girl Scout Cookies’. The flowers of ‘MR2018003’ are dark purple in colour and have large, swollen calyxs. In contrast, the flowers of ‘Girl Scout Cookies’ are green in colour and the calyxs are not as large.
