| Local rice varieties are gene complex formed by long-term domestication and selection in China thousands of years of rice cultivation and different ecological environments. The type of local rice is the most colorful in the rice. Contains a lot of favorable known and unknown genes, local rice varieties have great potential use value in the breeding. Now the large area of application of improved varieties, mainly rely on the discovery and utilization of favorable genes in local varieties. Due to the large number of local rice varieties, named arbitrarily, sources collection widely and other reasons, there are too many redundancy varieties affected the research, evaluation and utilization in rice germplasm resources.15 groups (same name in one group) of heterogeneous with same name in Hunan Province Heterogeneous Gene Pool with a total of 170 rice materials are used in this research. Through a variety of processing methods including field testing, quality analysis, blast test, cold resistance test and molecular marker-assisted identification of means, the main test results are as follows:1.15 groups of materials other than the L group showed significant differences through statistical analysis of the agronomic traits performance by field test. The number of characters which traits were inspected significantly different take up 88.9ï¼…of total characters investigated.2. Only F22 and B7 reached the level of anti or above in the blast resistance test comparing the other materials are susceptible to different degrees.B7 determined to be resistance level 3 through 2 years repeated identification.3. Cl and C3 was total different compared with other materials in the same group, with the living rate were 62.0% and 44.7%. these two materials Cl was more stronger than C3 in cold resistance test through comparison test with Xiangnuo 1.4. Polymorphism of heterogeneous with same name are between 10.38%-24.72% through SSR Markers identification test which means most of the material are different in the genetic material performance.5.50 materials which take up 30.5% of total material were selected as a core collection through 14 groups heterogeneous with same name based on SSR markers clustering map and combined with agronomic traits clustering map, agronomic quality traits, resistance performance.The core collection showed little change than the original group in poor, mean, standard deviation and coefficient of variation beside that 55% coefficient of variation increased.This article finally looks into the future of the development of germplasm resources researches direction. |
