Zhengdao 18, a New Japonica Rice Variety with High yield, Disease Resistance and good quality

Zhengdao 18 is a new japonica rice variety with high yield, disease resistance and wide adaptability, which was bred by Grain cropping Institute of Henan Academy of Agricultural Sciences. Apply for the protection of new plant variety rights in 2005, notice No. CNA002221E. It was approved by Henan Province in 2006 and by the state in August 2007.

1. Characteristics: the whole growth period is about 152 days, the plant type is compact, the plant height is 95 cm, the growth is exuberant, the tillering ability is strong, the panicle rate is high, the stem is stout, the leaf color is green, the sword leaf is short, the leaf sheath is green, the ear length is 16 cm, the grain shape is dense, the grain shape is short and round, the threshing ability is moderate, the yellow fall is good in the later stage, the yield is good, the filled grains per panicle is 145, and the weight of 1000 grains is 26 grams.

Second, yield performance: participated in the regional trial of japonica rice in Henan Province from 2004 to 2005, 22 trials, ranking first among the tested varieties, with an increase of 8.95% over the control Yujing 6, reaching a very significant level. In the japonica rice production experiment in Henan Province in 2005, the yield of Zhengdao 18 ranked first among the 9 pilot projects in the province, which was 12.5% higher than that of Yujing 6, the control. Participated in the national northern rice regional test from 2005 to 2006, the yield increased by 10.8% compared with the control Yujing 6, and reached a very significant level. In 2005, the yield per mu reached 680 kg in Yuanyang, Henan and Huayuankou in Zhengzhou, while the yield of Yujing 6 was only about 450 kg per mu. In the high yield demonstration in 2006, the average yield of 100 mu was 650kg per mu, and the highest yield per mu was 780.2 kg.

In a demonstration plot of 100 mu in Chiqi Village, Xinfeng Town, Dafeng City on September 6 this year, it was measured in the field that the actual number of ears per mu was 232000 ears / mu, the average total grains per panicle was 148grains, the expected seed number was 130grains, the 1000-grain weight was 26g, and the theoretical yield was 784.2 kg / mu.

Third, resistance. Through disease resistance identification and field observation, Zhengdao 18 was not only resistant to panicle neck blast and bacterial blight, but also to stripe blight commonly occurred in recent years.

Fourth, quality. After quality analysis and inspection, Zhengdao 18 brown rice rate 85.1%, milled rice rate 74.7%, head rice rate 70.3%, chalky grain rate 23.5%, chalkiness 3.0%, amylose content 16.7%, gel consistency 82mm, transparency grade 1, alkali elimination value grade 7. The grain length is 5 mm, the ratio of grain length to width is 1.8, and the rice quality reaches the third grade of the national standard.

Suitable planting area: this variety is suitable to be planted in the japonica rice areas of Jiangsu, Shandong and Anhui provinces and the north and south rice areas of Henan Province.