What to achieve Yuan Longpings new dream: 18 tons / ha technology line

category:Society
 What to achieve Yuan Longpings new dream: 18 tons / ha technology line


When the May Day is approaching, Yuan Longping, a 88 year old academician of the Chinese Academy of engineering, is still busy in Sanyas southern breeding base. The scientist, who wrote a brilliant page in the history of human hunger, did not dare to take care of it, and thought about speeding up the new dream of his two deadline: producing high yield and high quality rice varieties. Let the super rice accompanies 100 million mu to tackle the problem continuously and surpass itself to achieve the goal of 18 tons / ha. The rice varieties with salt tolerance and high yield were bred, and 100 million mu of high yield seawater rice was popularized. The old man set his own validity in 2020. Is this new dream expected to be achieved on time? 18 tons / hectare, we have a technical route. 18 tons / hectare, we have a technical route. Deng Qiyun, the core breeding expert of the Yuan Longping team, is confident that the answer will be given to the ScienceDaily Daily reporter. Deng Qiyun, Chinas super rice Mu Mu second, third, Fourth target tackled the successful cultivar Y two you 1, Y two you 2 and Y two excellent 900 breeders. Based on the utilization of Intersubspecific heterosis between subspecies of indica, rice dynamic ideal plant type molding, and molecular marker breeding, we have obtained two potential varieties that are expected to achieve a target of 18 tons / hectare. First, for the Y two excellent 957 passed by the state last year, it is Deng Qiyuns Y two excellent variety sibling brother. However, Deng Qiyun is more optimistic about the new two excellent 950 which is expected to be passed through the middle and lower reaches of the Yangtze River. Through molecular marker breeding technology, we introduced big grain gene into its parents, so that the 1000 seed weight increased by 2 to 3 grams. The highest value of this index has increased by more than 10% over the previous rice varieties. Therefore, the growth potential of production is greater. Combined with the four matching comprehensive technical system, this year is expected to achieve new goals in small area planting. Deng Qiyun also said that the three line method and two-line cross breeding system method of Yuan Longping had great potential for steady increase in rice production. 176 materials are expected to be found for the development of high yield seawater rice. Seawater rice is not grown in seawater, its soil is saline alkali soil. At present, many wild rice resources with salinity tolerance of 3 to 12 per thousand have been found worldwide, but they are generally low yielding. Half wild rice is only about 100 kilograms per mu. Only salt tolerant rice with more than 300 kilograms per mu can be planted and popularized. Yuan Longping said. The high yield of rice is not a scientists show skill. On the one hand, by 2050, the population of the world will increase by 2 billion 300 million and the grain production must increase by 70%. On the other hand, abiotic stress, such as salt, drought and low temperature, will seriously affect the high and stable yield of crops. It is reported that more than 6% of the worlds land area is threatened by salt and alkali. In the arable land, 19.5% of paddy fields and 2.1% of dry land have been damaged by saline alkali. 15% of the paddy fields in China are affected by different degrees of salt damage. The area of global salinized land will continue to expand with climate change, sea level promotion, irrationality of irrigation and drainage systems and the underlying rock rich in harmful salt. Rice is a salt sensitive crop. Salt stress causes photosynthesis to decline, plant growth stops and even dies. Lin Jianzhong, an associate professor at the Hunan University, said. He noted that salt tolerance of rice is a comprehensive expression of many physiological traits, controlled by multiple genes. Despite the progress of such research, there are still many problems. For example, how to clarify the complex network model of salt stress signal pathway, the mechanism of rice transporter in salt stress stress response and ion transmembrane transport, and how to use identified salt stress related molecular markers and gene loci to cultivate salt tolerant rice varieties. At present, Chinas seawater rice breeding has also made some progress. In Qingdao sea water rice research center, 4 materials with salt water and more than 6 per thousand salt were cultivated for direct irrigation. In the authoritative evaluation of small area planting, 300 kg per mu yield was exceeded and the highest yield per mu was 620.95 kg per mu. This year, the center also plans to plant 176 newly cultivated sea water rice materials in 5 representative saline alkali soils, such as saline alkali land of frozen soil in northeastern China, arid and semi-arid area of Xinjiang, the Yellow River Delta in Dongying, and coastal saline alkali land of Chengyang, Qingdao, and to observe its agronomy under different climate and soil conditions. Traits, rice yield and quality. We hope to obtain several kinds of high-yielding seawater rice materials with potential for popularization. Zhang Guodong, deputy director of Qingdao seawater rice research and development center, said. At the same time, he said, there are still few genetic resources for salt and alkali resistance in China, and some wild sea rice germplasm resources are expected to be imported from abroad as soon as possible. Lack of complete molecular markers for salt tolerance genes is also hard . Establishing accurate identification system of salt tolerance gene molecular markers can accelerate the breeding process effectively. Source: ScienceDaily daily, editor of China Science and Technology Net: Ji Xue Ying _NN6784 This year, the center also plans to plant 176 newly cultivated sea water rice materials in 5 representative saline alkali soils, such as saline alkali land of frozen soil in northeastern China, arid and semi-arid area of Xinjiang, the Yellow River Delta in Dongying, and coastal saline alkali land of Chengyang, Qingdao, and to observe its agronomy under different climate and soil conditions. Traits, rice yield and quality. We hope to obtain several kinds of high-yielding seawater rice materials with potential for popularization. Zhang Guodong, deputy director of Qingdao seawater rice research and development center, said. At the same time, he said, there are still few genetic resources for salt and alkali resistance in China, and some wild sea rice germplasm resources are expected to be imported from abroad as soon as possible. Lack of complete molecular markers for salt tolerance genes is also hard . Establishing accurate identification system of salt tolerance gene molecular markers can accelerate the breeding process effectively.