This readme.txt file was generated on 2024-11-26 by <Name>
Recommended citation for the data: Rohwer, Charlie. (2024). Hop pedigree data. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/02k6-6995.

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GENERAL INFORMATION
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1. Title of Dataset: Hop pedigree data

2. Author Information

	Author Contact:  Charlie Rohwer (rohw0009@umn.edu)

	Name:  Charlie Rohwer
	Institution: University of Minnesota
	Email: rohw0009@umn.edu
	ORCID: {orcid}


3. Date published or finalized for release: 2024-11-25


4. Date of data collection: 2012-2018


5. Geographic location of data collection (where was data collected?): NA


6. Information about funding sources that supported the collection of the data: NA


7. Overview of the data (abstract):
This is a tab-delimited .txt file detailing what is known about pedigrees for hop varieties and breeding materials, mainly from British, German, and USDA breeding programs. The data start with Salmon's release of Brewer's Gold in 1934 and end with the USDA release of Vista in 2021. The data contain named varieties and parents (where known), including a substantial number of selections with unknown male parentage. The pedigrees are based on published data and conversations with researchers in the US, Germany, Japan, and UK. Hops from breeding programs in Australia, New Zealand, Germany, and private breeders in the US are under-represented due to their proprietary tendencies. The information here were used to generate a poster available for sale from the UMN Bookstore (SKU: 2820000084149), a smaller version of which is available from the UMN Digital Conservancy (https://hdl.handle.net/11299/267835). Additional information is contained on these posters, including indications of which varieties are dwarf, similarities of Columbus, Tomahawk, and Zeus, and equivalence of Styrian Golding, US Tettnanger, and Fuggle.


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SHARING/ACCESS INFORMATION
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1. Licenses/restrictions placed on the data: CC0 1.0 Universal (http://creativecommons.org/publicdomain/zero/1.0/)

2. Links to publications that cite or use the data:
UMN Bookstore, SKU: 2820000084149, ISBN 281000008414B. UMN Digital Conservancy https://hdl.handle.net/11299/267835.

3. Was data derived from another source?
	If yes, list source(s): Multiple published sources. Also personal communication with hop breeders in the UK, Germany, and Japan to clarify published discrepancies or missing information, or to validate assumed or published pedigrees.

4. Terms of Use: Data Repository for the U of Minnesota (DRUM) By using these files, users agree to the Terms of Use. https://conservancy.umn.edu/pages/policies/#drum-terms-of-use


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DATA & FILE OVERVIEW
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	Filename: Hop pedigrees 2021.txt 
	Short description: Pedigree data for named and numbered selections of hops, Humulus lupulus L.


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METHODOLOGICAL INFORMATION
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1. Description of methods used for collection/generation of data: Curated known or recorded pedigrees for hops.

2. Methods for processing the data: Recorded as a tab-delimited text file

3. Instrument- or software-specific information needed to interpret the data: Pedigrees may be displayed using software such as pedigree viewer (https://bkinghor.une.edu.au/pedigree.htm)

4. Standards and calibration information, if appropriate: NA

5. Environmental/experimental conditions: NA

6. Describe any quality-assurance procedures performed on the data: NA

7. People involved with sample collection, processing, analysis and/or submission: Joshua Havill (UMN graduate student), Yutaka Itoga (Sapporo Brewery), John Henning (USDA), Peter Darby (Wye Hops Ltd.), Anton Lutz (Bayerische Landesanstalt für Landwirtschaft - LfL).  


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DATA-SPECIFIC INFORMATION FOR: Hop pedigrees 2021.txt
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1. Number of variables: 3

2. Number of cases/rows: 298 + 1 header row

3. Missing data codes:

	Code/symbol: "#" 
	Definition: unknown parent

4. Variable List

	A. Name: Selection
	   Description: name or number or intermediate identifier for a hop plant or cross

	B. Name: Mother
	   Description: Female (seed) parent of the selection

	C. Name: Father
	   Description: Male (pollen) parent of the selection