Introduction to the Characteristics and Traits of the Dwarf Indica Rice Variety Aixianzhan

A new conventional rice variety, Aixianzhan, developed by crossing Yueyezhan 21/Yuanxianzhan and suitable for both early and late seasons with high quality and high yield, has been identified by the Food Quality Supervision and Testing Center of the Ministry of Agriculture (Wuhan) through physicochemical analysis as a national standard premium grade 1 rice, breaking the zero record for new rice varieties of national standard premium grade 1 in our province.

It is reported that this variety is a temperature-sensitive indica rice, medium-maturing in the early season and early-maturing in the late season. In the 2002 late season, it participated in the provincial regional trial, with an average yield of 383.29 kg per mu, an increase of 3.54% over the control Jingxian 89 at 370.17 kg per mu, a yield increase of 13.12 kg per mu, and a value increase of 15.74 yuan (calculated at the same price). In terms of rice quality, according to physicochemical analysis and identification by the Food Quality Supervision and Testing Center of the Ministry of Agriculture (Wuhan), the main physicochemical indicators are: head rice rate 59.5%, chalky grain rate 4%, chalkiness degree 0.4%, amylose content 17.32%, gel consistency 79 mm, physicochemical score 70 points. The grain length is 6.5 mm, the length-to-width ratio is 3.3, the transparency is grade 2, the crystal appearance is good, the cooking quality is good, and the rice taste is good. It is a national standard premium grade 1 rice, and is the only new variety among the provincial regional trial varieties in recent years that has been identified as reaching national standard premium grade 1. The Guangdong Provincial Grain and Oil Product Quality Supervision and Testing Station identified its appearance quality as grade 1 premium rice.

In terms of resistance, according to inoculation identification, the resistance frequencies to rice blast races Zhong B, Zhong C and total were 74.3%, 59.1% and 69.1% respectively, and the resistance to bacterial blight was grade 3, moderately resistant. In the rice blast nursery identification, both leaf blast and panicle blast were grade 5, moderately susceptible. In experimental and demonstration field production, no infection with rice blast has been found, and sheath blight in the field was light. It shows strong cold tolerance, resistance to lodging and tolerance to fertilizer, a high seed-setting rate, and good grain color at the late stage.