Study on Agronomic Traits and Yield of 94 Coix Germplasms
In order to screen for high-yield coix germplasm,agronomic traits and yield of 94 coix germplasms were deter-mined and analyzed at Taoyuan and Huaihua experimental sites in 2021.The results showed that the plant height of 94 coix germplasms at Taoyuan and Huaihua experimental sites ranged from 98.75-303.33 cm and 73.00-228.20 cm,the effec-tive tiller numbers was 31.13-58.00 and 20.00-80.67 ten thousand/hm2,the stem diameter was 5.71-9.26 mm and 3.81-10.09 mm,the straw yield were 6.76-66.69 t/hm2 and 9.44-62.96 t/hm2,the seed setting rates was 24.02%-80.67%and 22.08%-79.27%,the weight of 1 000 grains was 121.50-230.27 g and 103.15-224.74 g,the total grains per plant was 26.30-134.70 and 44.17-187.68,the grain yield was 0.85-5.20 t/hm2 and 0.78-5.59 t/hm2,respec-tively.According to the average yield of two experimental sites,8 high yield germplasms were selected,namely Longhui Coix,YY-33,YY21-24,YY21-15,YY21-02,YY19-06,YY-18 and YY17-33.The average plant height,effective tiller number per hectare,stem diameter and straw fresh quality were 150.75-253.25 cm,440 400-646 700,7.58-9.65 mm and 37.24-64.83 t/hm2,respectively.The seed setting rate was 48.41%and 74.48%,the 1 000-grain weight was 148.87 and 182.27 g,the number of grains per panicle was 63.80 and 135.19,and the grain yield was 3.50 and 5.12 t/hm2.
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