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BEIJING, Jan. 21 (Xinhua) -- Chinese Vice Premier Hui Liangyu on Friday urged local governments to step up efforts in protecting agricultural production as winter wheat growing regions in the north of the country have been suffering due to the prolonged drought.Hui warned that the drought could cause great harm to agricultural production.Rainfall in north China, including provinces of Shanxi, Hebei and Shandong, has decreased 20 to 90 percent from the average rain in the same period since October last year.Chinese Vice Premier Hui Liangyu (C) speaks at a meeting on anti-drought and disaster reduction, in Beijing, capital of China, Jan. 21, 2011. Hui Liangyu on Friday urged local governments to step up efforts in protecting agricultural production as winter wheat growing regions in the north of the country have been suffering due to the prolonged drought.Hui urged local departments to improve meteorological monitoring and analysis of the drought, and provide training and services to farmers in order to reduce losses brought about by scarce rain.He also called on local governments to step up construction of more water conservancy projects to better cope with dry weather.Meanwhile, the drought in the north is compared with the intensive icy rain and snow in south and southwest China. A lingering cold spell has been wrecking havoc in these regions, disrupting vegetable production, transportation, and supplies of daily necessities.Hui said the central government would also beef up support in helping these affected regions resume agricultural production as soon as possible.

WASHINGTON, May 2 (Xinhua) -- Rice originated in China, a team of U.S. genome researchers has concluded in a study tracing back thousands of years of evolutionary history through large-scale gene re-sequencing.Their findings, which appear Monday in the latest issue of the Proceedings of the National Academy of Sciences (PNAS), indicate that domesticated rice may have first appeared as far back as approximately 9,000 years ago in the Yangtze Valley of China. Previous research suggested domesticated rice may have two points of origin -- India as well as China.Asian rice, Oryza sativa, is one of world's oldest crop species. It is also a very diverse crop, with tens of thousands of varieties known throughout the world. Two major subspecies of rice -- japonica and indica -- represent most of the world's varieties. Sushi rice, for example, is a type of japonica, while most of the long-grain rice in risottos are indica.Because rice is so diverse, its origins have been the subject of scientific debate. One theory -- a single-origin model -- suggests that indica and japonica were domesticated once from the wild rice O. rufipogon.Another -- a multiple-origin model -- proposes that these two major rice types were domesticated separately and in different parts of Asia. The multiple-origin model has gained currency in recent years as biologists have observed significant genetic differences between indica and japonica, and several studies examining the evolutionary relationships among rice varieties supported more than domestication in both India and China.In the PNAS study, the researchers re-assessed the evolutionary history, or phylogeny, of domesticated rice using previously published datasets, some of which have been used to argue that indica and japonica rice have separate origins. Using more modern computer algorithms, however, the researchers concluded these two species have the same origin because they have a closer genetic relationship to each other than to any wild rice species found in either India or China.In addition, the study's authors examined the phylogeny of domesticated rice by re-sequencing 630 gene fragments on selected chromosomes from a diverse set of wild and domesticated rice varieties. Using new modeling techniques, which had previously been used to look at genomic data in human evolution, their results showed that the gene sequence data was more consistent with a single origin of rice.In the study, the investigators also used a "molecular clock" of rice genes to see when rice evolved. Depending on how the researchers calibrated their clock, they pinpointed the origin of rice at possibly 8,200 years ago, while japonica and indica split apart from each other about 3,900 years ago. The study's authors pointed out that these molecular dates were consistent with archaeological studies.Archaeologists have uncovered evidence in the last decade for rice domestication in the Yangtze Valley beginning approximately 8, 000 to 9,000 years ago while domestication of rice in the India's Ganges region was around about 4,000 years ago."As rice was brought in from China to India by traders and migrant farmers, it likely hybridized extensively with local wild rice," explained New York University biologist Michael Purugganan, one of the study's co-authors. "So domesticated rice that we may have once thought originated in India actually has its beginnings in China."

LOS ANGELES, May 25 (Xinhua) -- NASA project managers bade farewell to the Mars rover Spirit on Wednesday after sending a final set of commands to the stranded vehicle.This marks the completion of one of the most successful missions of interplanetary exploration ever launched, NASA's Jet Propulsion Laboratory (JPL) said."Last night, just after midnight, the last recovery command was sent to Spirit," said John Callas, the Mars Exploration Rover Project manager at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, Los Angeles."It would be an understatement to say this was a significant moment. Since the last communication from Spirit on March 22, 2010, as she entered her fourth Martian winter, nothing has been heard from her."NASA has tried in vain to regain communication with Spirit since it got stuck in sand about two years ago. The rover last communicated on March 22, 2010, as Martian winter approached and the rover's solar-energy supply declined.NASA checked frequently in recent months for possible reawakening of Spirit as solar energy available to the rover increased during Martian spring, but to no avail.A series of additional re-contact attempts ended on Wednesday, designed for various possible combinations of recoverable conditions, according to JPL."Our job was to wear these rovers out exploring, to leave no unutilized capability on the surface of Mars, and for Spirit, we have done that," said Callas.

BEIJING, Jan. 30 (Xinhua) -- China hoped Egypt could restore social stability and normal order at an early date, Foreign Ministry spokesman Hong Lei said Sunday."China has been closely watching the development of the situation in Egypt," Hong said when asked to comment on the ongoing turmoil in the country."Egypt is a friendly country with China, and we hope Egypt could restore social stability and normal order at an early date," he said.

CAIRO, Jan. 23 (Xinhua) -- The first training session for Egyptian Chinese language teachers to improve their teaching ability started on Sunday in Cairo.The session, under the supervision of the Chinese Confucius institute, will concentrate on the exchange of experiences in teaching the Chinese language in Egypt and the enhancement of Egyptian teachers' ability to make better use of the textbooks.The three-day training session will contain language and cultural courses by professors and instructors from famous Chinese universities such as Beijing University and Beijing Foreign Studies University, said Li Shengjun, head of the Confucius Institute at Cairo University.Nearly 60 Egyptian Chinese language teachers, including 14 professors, from universities including Cairo University, Ain Shams University and Minya University will attend the training courses.China has established 691 Confucius institutes and classes in around 69 countries until 2010, including nine in the Arab countries.