Introduction And Evaluation Of Two-Row Barley Germplasms Abstract

In the experiment, 54 introduced germplasms were planted in two years and their seedling characters, leaf breadth and colours, frostbite damages and topmost inter-node elasticities, spike colors, auricle colors, awn lengths, culms waxiness and resistances( to diseases and lodging) were observed and recorded; after they had been harvested their plant heights, spike lengths, topmost inter-node lengths, kernel numbers per spike and 1000-seed weights and yields were measured in lab. Statistic software named DPSV3.11 was employed to conduct the principal component analysis and cluster analysis of the data collected in the experiment and then the following results were obtained:1. Four eigenvectors were screened by principal component analysis to evaluate the tested materials and conduct the covariance matrix analysis of six traits of all the tested materials, and then the first four principal components were ranked in the increasing order of topmost internode and plant height, kernel number per spike and spike length, and 1000-seed weight and yield; the ordination was capable of indicating the position and importance of each material and visually judging advantageous or disadvantageous traits of each materials, for instance, high kernel numbers per spike of 2024, D-50 and 96-158, high 1000-kernel weight or large kernels of D-18 and high plant heights of D-100.2. The tested materials were divided into six groups by cluster analysis. The first group was the materials with high plant heights including 11 varieties, the second group was the materials with high kernel numbers per spike including 12 varieties , the third group was the materials with high plant heights and big spikes including two varieties, the fourth group was the materials with large kernels including 11 varieties, the fifth group was the grainy materials with big spikes including 7 varieties and the sixth group was the materials with plant heights , big spikes and high kernel number per spike including 5 varieties.3. According to their field growths, agronomic traits and statistic results, the materials were classified into four types, the varieties capable of being directly exploited, the varieties that performed well as a whole but some traits of whom needed improving, the materials that were of specific use and the materials capable of being preserved as germplasms.(1) The varieties capable of being directly exploited. The materials showed a good field growth, a good plant elasticity and good agronomic traits. Of the materials, there were two varieties being used in production.