Details for: G 33703, Cannabis sativa L., Deep Chunk


Summary Data
Taxonomy:
Cannabis sativa L.
Top Name:
Deep Chunk
Origin:
Collected – Afghanistan
Received by NPGS:
22 Aug 2023
Improvement Status:
Landrace
Form Received:
Seed
Life Form:
Annual
Life Cycle:
Annual
Life Habit:
Shrub
Availability
This accession is not available. Contact site for status.
 
Images (8 total. Click on image for more.)

PLANT

Core Passport Data
Taxonomy:
Cannabis sativa L.
Top Name:
Deep Chunk
Origin:
Collected – Afghanistan
Received by NPGS:
22 Aug 2023
Improvement Status:
Landrace
Form Received:
Seed
Life Form:
Annual
Life Cycle:
Annual
Life Habit:
Shrub
Source History
Collected
PRE 2023.
Afghanistan
Comment: Donor narrative: materials collected from USA/Afghanistan
Collector(s):
Accession Names and Identifiers
Deep Chunk
Type: Collector identifier
Alternative name given by donor = "FREAKCHUNK".
Pretty, Angus

FREAKCHUNK
Type: Collector identifier
Alternate name provided.
Pretty, Angus

G 33703
Type: Site identifier
Stansell, Zachary USDA ARS PGRU

Narrative
Donation on 20230822 contained 1 seed packet. USA reported as a secondary origin and labeled as 'FREAKCHUNK'.

Donor narrative: Unknown collector, allegedly originates from Afghan landrace material collected during 1970s. Type: Heirloom . Purpose: Sinsemilla – but claimed to be derived from an Afghan hashish landrace. Narrative: According to aficionados, ‘Deep Chunk’ is a pristine Afghan strain, in the sense that it’s never been outcrossed. It’s said that ‘Deep Chunk’ was developed in America by a breeder named Tom Hill based on an Afghan landrace collected in 1970s Afghanistan. In my [Angus’s] view, ‘Deep Chunk’ can’t be considered an authentic Afghan landrace for this same reason, namely that it’s (1) undergone around five decades of intensive individual selection in the west and (2) been selected for production high-THC sinsemilla. Crucial to understanding Asian drug-type landraces is that there is no history or culture of ganja (ie, sinsemilla) production north of 30°N – roughly western Uttar Pradesh (UP) in modern India. North of UP the historic cannabis product shifts to bhang, not sinsemilla, throughout the Punjab. North again into the Northwest Frontier of Pakistan and the Hindu Kush mountains, and we are into desert Central Asia, where the primary product is charas (aka, dry-sieved hashish). In other words, 30°N in UP marks a dividing line between northern and southern populations, with northern populations having a long history of bulk selection, and southern populations having a long history of relatively frequent individual selection. For this reason, southern populations show a much higher prevalence of Type 1 individuals, ie individuals with a high ratio of THC to CBD. A field of ‘Deep Chunk’ plants has no equivalent in Afghanistan.. Genetics: ‘Deep Chunk’ (Californian – Afghan Hindu Kush). Type: Pure Indica-type. Indoors: c. 56 days. Outdoors: September. Classification: C. sativa subsp. indica var. afghanica. This is a Spanish continuation of the original Tom Hill Deep Chunk, a renowned true-breeding Indica-type strain with roots in the Afghan Hindu Kush. Work has been done to remove weak plants and ‘mutants’. The original landrace from which Deep Chunk was inbred is said to have been introduced to Northern California in the late 1970s. Crucially, it’s believed to have never been outcrossed. Deep Chunk is known for its fast flowering time, thick stems, short internodes, and excellent resin production. It’s a classic Indica that produces copious leaves and broad leaflets. Buds are dense and yield earthy, herbal aromas, including hashy pine, citrus, coffee, and chocolate. A weakness is its susceptibility to botrytis. A strength is its knock-down potency. True-breeding for many traits, this is an archetypal Indica that’s earned a reputation as an excellent breeding plant.”
[Donor describes this accession as a heirloom landrace, see:] REMARKS

Accession was (or attempted to be) included in the 2024 USDA-ARS Hemp Germplasm Laboratory and HudsonAlpha genome sequencing and phenotyping trial in PGRU Wellington Zone 01 [curator notes 2024:] Highly susceptible to powdery mildew.
Cannabis sativa L.
Genus:
Cannabis
Family:
Cannabaceae
Nomen number:

8862
Place of publication:

Sp. pl. 2:1027. 1753
Verified:
05/06/1992 by ARS Systematic Botanists.
Other conspecific taxa
Cannabis sativa L. subsp. indica (Lam.) E. Small & Cronquist (0 active accession[s])
Cannabis sativa L. subsp. sativa (0 active accession[s])
Autonyms (not in current use), synonyms and invalid designations
Common names
LanguageNameAlternate namenoteseqCitation
Englishhemp  1Botanical Society of the British Isles. BSBI taxon database (on-line resource).
Chineseda ma大麻 2Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition).
English (Canada)marijuana Agriculture & Agri-Food Canada official name2Darbyshire, S. J. 2003. Inventory of Canadian Agricultural Weeds Agriculture and Agri-Food Canada. 65-66.
Frenchchènevis chanvre  2Demilly, D. et al. 2001. Liste alphabétique des principales espèces de plantes cultivées et de mauvaises herbes. Noms latins et noms français, ed. 7 GEVES-SNES, Beaucouzé, France.
French (Canada)chanvre Agriculture & Agroalimentaire Canada nom officiel2Darbyshire, S. J. 2003. Inventory of Canadian Agricultural Weeds Agriculture and Agri-Food Canada. 65-66.
Italiancanapa  2International Seed Testing Association. 1982. A Multilingual Glossary of Common Plant-Names 1. Field crops, grasses and vegetables, ed. 2.
Japanese Rōmajiasa  2Iwatsuki, K. et al. 1993-. Flora of Japan.
Swedishhampa  2Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
Transcribed Koreansam  2Mun-Chan, B. et al. 1986. A checklist of the Korean cultivated plants. Kulturpflanze 34:87.
Annotations
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Pathogens
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Citations
Pedigree

Observations

Phenotype Data

CategoryDescriptorDescriptionValueSample SizeStudyInventoryAvailability
COMMENTREG_COMPLIANTREG_COMPLIANTUNTESTED - Pending compliance testing with 2021 Department of Agriculture Agricultural Marketing Service Hemp Final Rule (7 CFR Part 990 [Doc. No. AMS-SC-19-0042; SC19-990-2 FR])  Hemp Final Rule (7 CFR Part 990 [Doc. No. AMS-SC-19-0042; SC19-990-2 FR])">HEMP_REG_COMPLIANCE Not Available
DISEASESEPTORIASeverity of septoria infestation. TBD 20231006. Update with protocol when available [zjs]3022024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
DISEASEPOWDERYSeverity of powdery mildew infestation. TBD 2024112. Update with protocol when available [zjs]9022024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
FLWR-FRUITFEMALE_RATIOFemale ratio. Ratio of observed population with only pistillate flowers; ratio pistillate only individuals observed (0-100).0.592024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
FLWR-FRUITMALE_RATIOMale ratio. Ratio of observed population with only staminate flowers; Ratio staminate only individuals observed0.592024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
FLWR-FRUITMONO_RATIOMonoecious ratio. Ratio of observed population both pistillate and staminate flowers.092024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
FLWR-FRUITF_DAYLENGTHFemale (daylength). Daylength at terminal female flowering. Calculated using site data for latitude, in degrees (i.e. between -90.0 and 90.0) with the daylength() function in the R package geosphere (https://rdrr.io/cran/geosphere/man/daylength.html). [hours].13.4832024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
FLWR-FRUITM_DAYLENGTHMale (daylength). Daylength at first male flower anthesis. Calculated using site data for latitude, in degrees (i.e. between -90.0 and 90.0) with the daylength() function in the R package geosphere (https://rdrr.io/cran/geosphere/man/daylength.html). 14.5132024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
GENSTOCKSEED.NONumber of seeds in original seed lot (count)125 MARVIN_SEED_ANALYSIS_PGRU_V001G 33703 23UO SDNot Available
GENSTOCKSEED.WEIGHTSeed Weight (g)1.94 MARVIN_SEED_ANALYSIS_PGRU_V001G 33703 23UO SDNot Available
GENSTOCKTSWThousand seed weight (g)15.52 MARVIN_SEED_ANALYSIS_PGRU_V001G 33703 23UO SDNot Available
GENSTOCKSEED.AREASEED.AREA8.9 MARVIN_SEED_ANALYSIS_PGRU_V001G 33703 23UO SDNot Available
GENSTOCKSEED.WIDTHSeed Width (mm)3 MARVIN_SEED_ANALYSIS_PGRU_V001G 33703 23UO SDNot Available
GENSTOCKSEED.LENGTHSeed length (mm)4.1 MARVIN_SEED_ANALYSIS_PGRU_V001G 33703 23UO SDNot Available
GENSTOCKSEED.LEN.WIDTH.RATIOSeed length to width ratio1.4 MARVIN_SEED_ANALYSIS_PGRU_V001G 33703 23UO SDNot Available
GENSTOCKSEED.BRIGHTNESSSeed brightness 43.3 MARVIN_SEED_ANALYSIS_PGRU_V001G 33703 23UO SDNot Available
MORPHOLOGYMCDMaximum canopy diameter. [decimal; cm] Maximum canopy diameter (mcd) as width of plant at widest set of branches, see Carlson et al. (2021). Measured from widest tip to tip without stretching branches. Include flowering tissue in measurement.100.7932024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
MORPHOLOGYMCDHHeight evaluated at maximum canopy diameter. [decimal; cm] Maximum canopy diameter height, Evaluated at maximum canopy diameter (MCD) to ground, see Carlson et al. (2021).105.1632024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
MORPHOLOGYTRKLTrunk length. [decimal; cm] Trunk length (trkl) is evaluated as distance from ground to first branch. See Carlson et al. (2021).10.142024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
MORPHOLOGYKITE_PERIMETERKite Perimeter. [decimal; cm] See Carlson et al. (2021).388.52442024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
MORPHOLOGYKITE_AREAKite Area. [decimal; cm2] See Carlson et al. (2021).8389.7642024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
MORPHOLOGYDIADiameter of the stem. dia [decimal; mm]
Diameter of the stem at soil level using forestry measuring tape or fabric measuring tape, modified from Carlson et al. (2021).		49.642024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
MORPHOLOGYKITE_CIRCULARITYKite Circularity. A continuous scale of apical dominance can be derived (See Carlson et al. 2021)0.6842024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
MORPHOLOGYHTsee https://www.ars.usda.gov/northeast-area/geneva-ny/plant-genetic-resources-unit-pgru/docs/hemp-descriptors/161.7532024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
MORPHOLOGYTRK_RATIOTest phenotype calculated as the ratio of trunk length divided by the height of the plant [TRKL/HT]. This is a proxy for the degree of branching on the lower portion of the plant, which has been identified in conversations as an important agronomic trait for fiber production. PGRU is evaluating this trait, but it is not currently included in the Hemp Phenotyping Handbook.0.0658342024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
PHENOLOGYDAYS_TO_FLOWER_FEMALE Days To Flower Female. [integer]

Pre-terminal date when axial flowers with shortening internodes and terminal pistils (clusters of flowers at shoot termini) were observed Carlson et al. (2021) as days from sowing to first observed open female and male inflorescence. See also Faux et al. (2013); Shams et al. (2020)		110.532024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
PHENOLOGYDAYS_TO_FLOWER_MALE Days To Flower Male . [integer]

Pre-terminal date when axial flowers with shortening internodes and terminal pistils (clusters of flowers at shoot termini) were observed Carlson et al. (2021) as days from sowing to first observed open female and male inflorescence. See also Faux et al. (2013); Shams et al. (2020)		85.522024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available
PHENOLOGYDAY_NEUTRALITY Day Neutrality. [nvarchar]
Describe flowering behavior as critical day length and/or day neutral response. A more precise definition is required to define this phenotype quantitatively.		092024-HA24-PGRU-SEQUENCING-Z1G 33703 23UO SDNot Available