Analysis Of Agronomic And Quality Traits In The Annual Wild Barley Accessions Of Qing-Tibetan Plateau

Barley is one of the most important ancient cereal crops, and also the fourth ranking staples after wheat, maize and rice in the world. The annual wild barley (Hordeum Spontaneum) of Qinghai-Tibetan Plateau is a very precious resource for the research of barley in the world. A total of 30 barley varieties, including 13 two-rowed wild barley lines and 17 six-rowed barley varieties, were used to detect their genetic diversities, based on 10 agronomic characters, protein and starch. Some basic information were presented for barley genetic breeding. The main results of this research were as follows:1. For barley of different rows, the results respectively indicated that there were significant differences among all germplasm resources in agronomic characters. In six-rowed barley, the lowest standard deviation of the single plant available spikes was 1.10, and the highest of the single plant spikes was 89.92. The genetic variance of distance of flag leaf phyllula to neck was highest, with the coefficient of variation of 54%. The genetic coefficient of variation of plant hight was 54%, the lowest. In two-rowed barley, the lowest standard deviation of main spike length was 1.02, and the highest of the single plant spikes was 39.75. The distance of flag leaf phyllula to neck displayed the highest coefficient of variation,40%. The main spike length and spikelet number of main spike showed the least variation, both 13%.2. Among all the barley germplasm resources investigated, the protein content of two-rowed barley ranged from 15.00% to 16.52%, with an average of 15.54% and the coefficient of variation of 3.21%. The cultivar D136 displayed the lowest average protein content of 15.00%, while D134 showed the highest that of 16.52%. For six-rowed barley, protein content data demonstrated a range of 14.51% to 16.74% and an average of 15.10%, with the coefficient of variation of 3.61%. Among them, the material D47 had the lowest average protein content of 14.51%, while D161 has the highest,16.74%.3. Among the 30 barley varieties studied, the starch content of two-rowed barley ranged from 49.64% to 51.63%, with an average of 50.49% and the coefficient of variation of 1.09%. The material D134 showed the lowest average starch content of 49.64%, while D311 displayed the highest that of 51.63%. As to six-rowed barley, the results indicated a range of 48.98% to 51.85% and an average of 50.53%, with the coefficient of variation of 1.25%. Among them, the variety D161 had the lowest average starch content of 48.98%, while D252 has the highest,51.85%.4. The correlation analysis illustrated that protein content had negative correlation with plant hight, spikelet number of main spike, the single plant spikes, the single plant fact seed numbers, single plant kernel weight and starch content, significant with spikelet number of main spike on level 0.05, while the correlation with the single plant available spikes, main spike length, awn length, uppermost inter-node length and distance of flag leaf phyllula to neck was positive. The results showed that starch content had negative correlation with plant hight, the single plant available spikes, main spike length, uppermost inter-node length, distance of flag leaf phyllula to neck, the single plant spikes, the single plant fact seed numbers, single plant kernel weight and protein content, significant with the single plant available spikes on level 0.05 and exceedingly significant with single plant kernel weight on level 0.01. There was positive correlation when compared with awn length and spikelet number of main spike.