The first genetic linkage map of carp in the world has been drawn in China

OA show ('918 '); Chinese researchers have successfully mapped out the world's first genetic linkage map of carp, thus creating the necessary technical conditions for the future cultivation of carp varieties with specific good quality on the DNA molecular level In this map, the known DNA molecules closely related to the good quality of carp have been accurately arranged in an order and marked out their positions according to their identity as "neighbors" There are 262 DNA molecular markers in this map, including 178 gene markers They are naturally divided into 50 groups, which is exactly the same as the number of haploid chromosomes of carp, and one-to-one correspondence Liang Liqun, an associate researcher at Heilongjiang Institute of fisheries, Chinese Academy of Fishery Sciences, who led the research, said that this is a good "map" of carp DNA molecules, which makes it clear at a glance the position and interrelationship of some DNA molecules that play an important role in carp's good quality At the same time, it will also enable human beings to carry out carp breeding by changing related DNA molecules in the future Become a reality At the same time, the research team also carried out the analysis and Research on the cold resistance of carp, and successfully obtained 6 gene markers related to this, and determined the location in the map, which means that with the help of these genes, the fish with cold resistance can be made cold resistant Experts from the expert group of the Ministry of agriculture, which identified the results, said that the research is at the leading level in the international similar research The drawing of carp genetic linkage map and the analysis results of cold resistance obtained from the research on DNA molecular level are the first in the world Previously, only two kinds of aquaculture animals in the world, trout and tilapia, had established genetic linkage maps, which were all drawn by US researchers In 1999, the Chinese Academy of Fisheries officially launched the research program of genetic linkage map of three kinds of aquaculture animals, including carp and silver carp (Science and technology daily) China feed industry information network S4 (author:)