Break through the "stuck neck" problem!Hunan rice may be "turning the battle"

Author | Reporter Cai Liping Zheng Yu Liang

Source | State -owned Assets Xiaoxiang Rong Media

Hunan shared the reputation of "the hometown of non -ferrous metals" and "the hometown of fish and rice", but under the fame, as one of the most important rice production areas in the country, Hunan rice was once fell into a "word of mouth", facing the image of reshaping, making bigger the image, bigger to become bigger. Stronger challenge.

However, with the demonstration promotion of low cadmium cadmium cadmium, rice from Hunan may have a "turnaround".

On July 8th, experts such as the Rice Professional Committee of the National Agricultural Article Category Development Commission of the National Agricultural Technology Center organized the National Special Types of Cadmium Cadder Variety for the National Special Types of Cadmium Cadder Variety. The results of the inspection show that the cadmium content of 6 low cadmium cadmium cadres has reached safety standards. Some varieties of cadmium cadmium are even 0 mg per kilogram. It can be recommended to conduct tests in the next stage.

Surprisingly, 4 varieties of these 6 low cadmium cadmium cadmium accumulation are selected by Hunan Jinjian Seed Industry Technology Co., Ltd., including Zhongan Early No. 7, Zhong'an Early No. 17, Zhong'an Early Early 35th, Zhongan 2 The four varieties are displayed as: 0.053, 0.017, 0.019, and 0.065 mg per kilogram of rice per kilogram of rice, which is lower than the national safety standard of 0.2 mg per kilogram.

△ Experts given the results of the test results of low cadmium accumulation of rice varieties (news screenshots).

On the same day, the expert group led by another academician team was a new variety demonstration film in Longquan Community (Cadmium Pollution Zone), Longquan Community (Cadmium Pollution Zone), Changsha County. No. 2 and Zhong'an No. 2 were tested in rice cadmium. They are Chen Wenfu, Wan Jianmin, Zou School, academician of the Chinese Academy of Engineering, Nanjing Agricultural University, Huazhong Agricultural University, Hunan Agricultural University, Heilongjiang Provincial Institute of Rice Research, Hunan Academy of Agricultural Sciences, Hunan Hybrid Rice Research Center, Hunan Provincial Grain and Oil Product Quality Monitoring Guidance group of rice expert in the agricultural and rural ministry of the center and Hunan Provincial Institute of Rice. The test results also showed that the content of cadmium cadmium in Zhongan No. 7 and Zhongan No. 2 reached safety standards.

△ New varieties demonstration films in Longquan Community (Cadmium Pollution Area), Longquan Community, Changsha County, and conducted inspections and reviews of low cadmium early rice varieties led by Chen Wenfu, Wan Jianmin, and Zou School.

The rice processed by rice is the main source of the diet of Chinese residents. According to data, 65%of Chinese people use rice as an absolute staple food. Therefore, the setting of cadmium -containing cadmium standards in China has always been the most watched content in the revision of the national standards of food safety. my country's current "Limits of Pollution in Food" (GB2762-2017) was released in March 2017. Among them, the cadmium limit index of rice, brown rice, and rice category is less than 0.2 mg/kg. This standard is strictly in international standards, and even in Japan and Taiwan, which are also stapled by rice, rice cadm is limited to 0.4mg/kg.

As a new low cadmium variety successfully tested last year, Zhong'an Early 7 and Zhong'an No. 2 planted a total of 100 acres in Longquan Community (Cadmium Pollution Zone) in Longquan Town, Changsha County. This year, these two early rice varieties have reached 1218 acres in 32 districts (cities) in the province.

Will the cadmium content be reduced, will the rice output be reduced?

The guidance group of the rice experts of the Ministry of Agriculture and Rural Affairs agreed that the low accumulation of low cadmium cadmium in Zhongan Earlier 7 and Zhongan No. 2 was significant. According to on -site testing, Zhong'an Earlier 7 has a strong rate of 86.6%, and the theoretical output reaches 706.2kg/mu; Zhongan No. 2 has a strong rate of 85.7%and the theoretical output is 739.0kg/mu.

Studies on the US Department of Agriculture show that rice is the strongest cash in cadmium absorption. So how to reduce the cadmium content of rice?

"Genetic mutations, so that rice seeds do not absorb cadmium." Wang Jianlong, a doctoral supervisor in Hunan Agricultural University, Wang Jianlong, chairman of Jinjian Seed Industry. Create a mutant material that is extremely low in absorption of seed grains and can stabilize inheritance, "LCD1", which can reduce the activity of related functional protein, thereby hindering the absorption of cadmium in the root system.

Established in early 2014, Jin Jianye is a mixed ownership enterprise in Hunan Grain Group Co., Ltd., and has been focusing on the research and development of high -end high -quality hybrid rice rice since its establishment. Beginning in 2018, the company developed the varieties of "Tao Youxiang Zhan", "Tai You 553" and "Huazhe You 261". It has won the national high -quality rice food review gold award for three consecutive years, becoming the only seed company in the country to win the gold award.

The "stuck neck" problem over the excellent cadmium cadmium of rice, and has unparalleled Jinjian species with the background of the state -owned assets. In recent years, it has continued to carry out research on low cadmium varieties. Based on "LCD1", Jinjian Seed Industry has selected Zhong'an Early Early No. 7, Zhong'an Early Early Early Early Early Early Early Early 35, Zhong'an No. 2, Anyou 1, Anyou 2, An Liangyou 2, Qing Lianshi Miao and Qinglian Silk occupy a dozen low cadmium varieties. In the province's 34 districts and counties in the province, the development area of ​​the morning, middle and late rice demonstration is about 20,000 acres. It will accelerate the production safety of cadmium pollution of rice fields and rice.

Further reading:

The harm of cadmium to the human body is mainly chronic and accumulated. Foods with a large amount of cadmium content in a long time may cause kidney and bone damage.The half-life of cadmium in the human body is 17-38 years, and it will be accompanied by half a lifetime, even for life.Medical literature shows that after several years or even chronic accumulation of cadmium into the human body, the human body will have significant symptoms of cadmium poisoning, which may cause "pain" in severe cases.During the translation process of the encoding area, the 236th codon CCC mutations were mutated to CTC, which changed from proline (pro) to brightine (LEU).After the mutation, OSNRAMP5 protein activity in "LCD1" decreases significantly, which hinders the absorption of cadmium in the root system.

Main editor | Xie Gongmei

Executive editor 丨 Huang Shangrun

School Audit | Small 100 billion

Editor in charge | Kuangjia

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