Search

[Objective] The present paper aimed to explore the excellent genes of germplasm resources of Tiebt barley and provide high-quality materials for breeding. [Method] The genetic diversity, clustering and principal component analysis of 13 agronomic traits were carried out by using Excel and SPSS 21. 0 software with 140 germplasm resources from different areas of Tibet [Result] There was rich genetic diversity in barley resources in Tibet, and the coefficient of variation of panicle number per plant among 8 agronomic traits was 43.7%. Cluster analysis divided the 140 materials into five groups at the genetic distances of 6 level, of which 3 5 materials were in group I, 29 materials were in group II, 33 materials were in group Ill, 15 materials were in group N and 28 materials were in group V. The results of principal component analysis showed that when the 8 agronomic traits were simplified into 3 principal components, the cumulative contribution rate was 72. 587 %, and the contribution rate of panicle per plant was the highest, which was 0. 829. [Conclusion] The study provides a scientific basis for the protection and utilization of germplasm resources in Tibet. [ABSTRACT FROM AUTHOR]

[Objective] The present paper aimed to reveal the genetic diversity of blaslogenesis by phenotypic characters of walnut in Xinjiang, aiming to provide the basis for classification, determination and utilization of germplasm resources of walnut in Xinjiang. [Method] Based on the comprehensive survey on germplasm resources of walnut, phenotypic character indexes and data were collected. Simpson (D) and Shannon-Weaver indexes (H') were used to conduct diversity test on polymorphism of qualitative characters, and classify the sample test of walnut germplasm through hierarchical clustering according to phenotypic character. [Result] The five quantitative characters of walnut complied with normal distribution in K-S test. The range of variations in three-diameter mean value was from 19. 14 to 46.59 mm. Among the polymorphism indexes of phenotypic and qualitative characters in walnut, the base section and shoulder section containied high levels of I) and H'. Germplasm walnuts were classified into nine categories, which were related to phenotypic characters, such as sizes, shapes and shells, rather than geographical distribution. [Conclusion] Phenotypic character and diversity analysis make it possible to assess the diversity of walnut germplasm resources in Xinjiang. Besides, it also demonstrates the high level for the diversity and phenotypic characters of local walnut germplasm resources in Xinjiang, containing abundant genetic resources and tremendous potential of utilization and development. [ABSTRACT FROM AUTHOR]