This standard specifies the terms and definitions for the selection and breeding of rubber tree varieties, as well as the requirements for superior varieties, the naming rules for varieties, the breeding and promotion of superior varieties, etc. This standard is applicable to the selection and recommendation of rubber tree varieties in my country. NY/T 688-2003 Rubber Tree Varieties NY/T688-2003 Standard download decompression password: www.bzxz.net

Appendix A of this standard is a normative appendix. This standard was proposed by the Agricultural Reclamation Bureau of the Ministry of Agriculture.
This standard is under the jurisdiction of the Technical Committee on Standardization of Tropical Crops and Products of the Ministry of Agriculture. NY/T688-2003
The drafting units of this standard are: Rubber Institute of Chinese Academy of Tropical Agricultural Sciences, Science and Technology Department of Hainan Agricultural Reclamation Bureau, Science and Technology Enterprise Management Department of Yunnan Agricultural Reclamation Bureau, Science and Technology Production Department of Guangdong Agricultural Reclamation Bureau.
The main drafters of this standard are: Huang Huasun, Wang Suitong, Chen Jixian, Zhang Weixiong, Wu Yuntong, Yu Dongmei. 1
1Scope
Rubber tree varieties
NY/T 688--2003
This standard specifies the terms and definitions of rubber tree variety selection and breeding, as well as the requirements for superior varieties, the naming rules of varieties, the breeding and promotion of improved varieties, etc.
This standard applies to the selection and recommendation of rubber tree varieties in my country. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents are applicable. For all undated references, the latest versions are applicable to this standard. GB/T17822.1—1999 Rubber tree seeds
NY/T607 Rubber tree breeding technical regulations
3 Terms and definitionsbzxz.net
The following terms and definitions apply to this standard. 3.1
Primary variety trial area Primary variety trial area for preliminary screening of more test materials. 3.2
Advanced variety trial area The area of ​​the plot is enlarged, the marginal impact is controlled, the accuracy is high, and it is the highest level of trial area. 3.3
Productive variety trialProductive variety trialA trial area with more plants (half or one tree position) established and managed according to production requirements. 3.4
Windfirm and high-yielding cloneWind-resistant high-yielding varieties
High-yielding and windfirm cloneVarieties with high dry gum yield and wind resistance comparable to that of the control varieties. 3.6
Cold-resistant and high-yielding cloneCold-resistant and high-yielding cloneVarieties with strong cold resistance.
High-yielding and cold-resistant cloneVarieties with high dry gum yield and cold resistance comparable to that of the control varieties. 3.8
Disease-resistant and high-yielding cloneDisease-resistant and high-yielding cloneVarieties with strong disease resistance.
NY/T 688—2003
Needle-puncturingexploitation cloneNeedle-puncturingexploitation cloneA variety that does not use yield stimulants and can obtain high yields by needle-puncturing. 3.10
Efficiency standing ratioThe percentage of rubber trees that can be tapped in the test area to the original number of plants. 3.11
Accumulative wind breakage ratioAccumulative wind breakage ratioThe percentage of the cumulative number of plants that suffered level 4 and level 6 and felled (damaged plants are not counted repeatedly) in all previous wind damages to the number of plants in the first survey. 3.12
Drought hardiness
The ability of rubber trees to endure drought in arid areas or dry seasons. 3.13
Latex and timber cloneA variety with high dry rubber yield and large standing timber volume. 3.14
Standing volume
The total volume estimated from the trunk and branches with a girth of ≥30 cm. 3.15
Secondary characteristicsGeneral term for other characteristics except rubber yield, volume and resistance. 3.16
Budwood
Budwood from the proliferation nursery for bud grafting. 4 Requirements for superior varieties
The superior varieties are divided into promotion grade, expanded trial grade and trial grade. The evaluation of their grades shall comply with the provisions of NY/T607, and the type of comparison area, the years of systematic appraisal, and technical indicators and other systematic and complete information shall be provided in accordance with Appendix A. 4.1 Comparison area
The design method, number of repetitions, number of trees recorded in the plot and the spacing between rows and plants of the comparison area shall comply with the provisions of NY/T607. The trial-level varieties are evaluated based on the data from the primary system comparison area, and the expanded trial-level and extension-level varieties are evaluated based on the data from the advanced system comparison area or production system comparison area.
4.2 System identification data age
Extension-level varieties ≥5 years;
Expanded trial-level varieties ≥2 years;
Trial-level varieties ≥3 years.
4.3 Technical indicators
4.3.1 Technical indicators for high-yield varieties
The technical indicators for high-yield varieties are shown in Table 1.
Asexual or
Sexual system
Asexual system
(including Sanhe tree)
Sexual system
Promotion level
Promotion (including expansion
trial planting) level
Trial planting level
Promotion (expansion
trial planting) level
Trial planting level
Variety type
Wind-resistant high-yield varieties
High-yield wind-resistant varieties
Cold-resistant high-yield varieties
High-yield cold-resistant varieties
Disease-resistant high-yield varieties
Needle-thorn rubber varieties
Wind-resistant high Product variety
High-yield wind-resistant variety
Cold-resistant high-yield variety
High-yield cold-resistant variety
Disease-resistant high-yield variety
Needle-piercing rubber varieties
Wind-resistant high-yield variety
Cold-resistant high-yield variety
Wind-resistant high-yield variety
Cold-resistant high-yield variety
Technical indicators of high-yield varieties
Unit area
Wind damage
Rubber yield exceeds collapse rate/
CK/(%)
5～104
10～15
For yield
NY/T 688—2003
Disease resistance stimulated early growth
～CK～CK≥CK
αCK|≥CK
αCKCK』
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