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A method for screening and evaluating low-cadmium rice varieties that can effectively reduce errors
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A screening method and technology for varieties, applied in rice cultivation, botanical equipment and methods, data processing applications, etc., to ensure consistency, increase pilot environment, and reduce experimental errors.
Active Publication Date: 2019-12-17
HUNAN RICE RES INST
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[0004] In view of this, this method aims to screen out reliable and stable low-cadmium rice varieties, and effectively reduces the screening error as a way to evaluate the tested varieties through the statistical analysis of rice cadmium content data. Provide technical support for cadmium pollution
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Embodiment 1
[0035] Taking the low cadmium screening test of late rice in 2015 as an example, the verification test was carried out in Wangcheng District, Changsha, Hunan, and the traditional field and pot plant screening were used as controls. Variety numbers 1-6, of which No. 6 is the low-cadmium accumulation rice control variety Xiangwanxian No. 12 .
[0036]The field screening test is a randomized block design with a plot area of 10 cm 2 (Length 4m, width 2.5m), the distance between the plots is 0.4m. There are 5 repetitions (blocks) for each variety, and the random number method is used for the “random” arrangement of varieties within the repetition. The specific varieties in the field are arranged as follows: Figure 5 Shown:
[0037] Traditional potted plants and potted plantscreening test soil of the present invention are selected from field paddy plow layer soil (full cadmium: 0.599mg / kg, pH: 5.9), after drying, pulverizing, mixing, put into pots, test pot diameter 40cm, heig...
Embodiment 2
[0050] Example 2 Screening of Candidate Rice Varieties with Low Cadmium Accumulation
[0051] In 2015, the low-cadmium screening test of late rice was carried out in Wangcheng District, Changsha, Hunan Province as an example. A four-level screening test was carried out in Wangcheng District, Changsha, Hunan. kg, the soil pH was 5.6, 5.9, 6.4, and 6.2, respectively, and the test soil was selected from the paddy field soil.
[0052] Data analysis: The cadmium content of soil rice at all levels was based on the low-cadmium rice control varieties, and abnormal repetitions or pilots were eliminated.
[0053] 1) Calculate the average cadmium content of rice in each reference variety under the test site
[0054] 2) Using the AMMI model (Main School Additive Interaction Multiplicative Model), analyze the stability performance of the cadmium content of the reference varieties of rice, and obtain the stability parameters D of each variety i , the specific data are shown in Table 4. ...
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Abstract
The invention aims at providing a low-cadmium rice variety screening method capable of effectively reducing errors. The low-cadmium rice variety screening method comprises the following steps of using six testing varieties as one testing group, setting 15 testing pots in each testing group, and arranging four varieties in each testing pot, wherein one testing group is added when the number of varieties is greater than six; comparing the testing groups, wherein every two variety combinations in the testing pots are respectively different. The screening method also comprises an evaluating method on harvested rice. The low-cadmium rice variety screening and evaluating method capable of effectively reducing errors has the advantages that the reliability, scientificity and stability are realized; the important function is realized in screening of the reliable and stable low-cadmium accumulated rice variety, and the technical support is provided for effectively and quickly solving the problem of cadmium pollution in the existing rice.
Description
technical field [0001] The invention belongs to the field of crop breeding, and in particular relates to a method for screening and evaluating low-cadmium rice varieties that can effectively reduce errors. Background technique [0002] The deterioration of the agricultural ecological environment and the serious cadmium pollution of agricultural products have become prominent problems facing my country's agriculture. At present, there are many methods or ways to solve this problem, such as variety breeding, variety screening, cultivation management, environmental control and other methods. Due to genotypic differences in rice varieties, the cadmium content of rice varies by up to 20 times among different varieties. Therefore, variety screening is a relatively direct and fast method. [0003] The cadmium uptake characteristics of rice are greatly affected by cultivation conditions such as water management, fertilizer level, and climate environment. However, traditional field...
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