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GB/T 20552-2023 English PDF

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GB/T 20552-2023: Pacific oyster
Status: Valid

GB/T 20552: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 20552-2023	English	209	Add to Cart	3 days [Need to translate]	Pacific oyster	Valid	GB/T 20552-2023
GB 20552-2006	English	279	Add to Cart	3 days [Need to translate]	[GB/T 20552-2006] Pacific oyster	Obsolete	GB 20552-2006

PDF similar to GB/T 20552-2023

Standard similar to GB/T 20552-2023

GB 5009.261 SC/T 4030 GB/T 20554 GB/T 21046

Basic data

Standard ID	GB/T 20552-2023 (GB/T20552-2023)
Description (Translated English)	Pacific oyster
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	B51
Classification of International Standard	65.150
Word Count Estimation	10,185
Date of Issue	2023-12-28
Date of Implementation	2024-07-01
Older Standard (superseded by this standard)	GB/T 20552-2006
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 20552-2023: Pacific oyster

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 65:150 CCSB51 National Standards of People's Republic of China Replace GB/T 20552-2006 long oyster Published on 2023-12-28 2024-07-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Foreword

This document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting: This document replaces GB/T 20552-2006 "Pacific Oyster": Compared with GB/T 20552-2006, except for structural adjustment and editorial In addition to the modifications, the main technical changes are as follows: a) The classification status has been changed (see 4:2, 3:2 of the:2006 version); b) Changed the quantifiable trait ratio (see 5:2, 4:1:2:1 of the:2006 version); c) The relationship expressions between shell height and shell length, shell length and body weight have been deleted (see 4:1:2:3 of the:2006 edition); d) Deleted biochemical genetic characteristics and detection methods (see Chapter 7, 8:2 of the:2006 edition); e) Added description of molecular genetic characteristics and detection methods (see Chapter 8, 9:5); f) Added judgment rules (see Chapter 10): Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents: This document is proposed by the Ministry of Agriculture and Rural Affairs of the People's Republic of China: This document is under the jurisdiction of the National Fisheries Standardization Technical Committee (SAC/TC156): This document was drafted by: Ocean University of China: The main drafters of this document: Li Qi, Yu Ruihai, Li Haikun, Xu Chengxun, Liu Shikai, Kong Lingfeng, and Yu Hong: The previous versions of this document and the documents it replaces are as follows: ---First released as GB 20552-2006 in:2006, and converted to the recommended national standard GB/T 20552-2006 in:2017; ---This is the first revision: long oyster

1 Scope

The main morphological and structural characteristics, growth and reproduction characteristics, cytogenetic characteristics and molecular genetic characteristics were determined, and the corresponding detection methods were described: The method provides the decision rules: This document applies to the identification and testing of oyster germplasm:

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document: GB/T 18654:2 Inspection of cultured fish germplasm Part 2: Sampling methods GB/T 22213 Aquaculture Terminology GB/T 32757 Shellfish karyotype analysis

3 Terms and definitions

The terms and definitions defined in GB/T 22213 and the following apply to this document: 3:1 shell height shelheight The maximum distance from the top of the shell to the ventral edge of the shell: 3:2 shell length The length of the widest part between the front and rear edges perpendicular to the shell height and parallel to the stranded wires of the two shells:

4 Scientific name and classification

4:1 Scientific name 4:2 Classification status Mollusca, Bivalvia, Ostreida, Ostreidae, Cras- sostrea):

5 Main morphological and structural characteristics

5:1 External form The shell is elongated and thin: The left shell is fixed, deeply sunken, and has thick scales; the right shell is flatter, with ringed, corrugated scales, sparsely arranged, and no radial ribs:

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