Grain shape of rice is an important trait, grain shape of different varieties of rice is different. With the continuous development of alfalfa crossbreeding, the grain shape of some glutinous rice varieties has changed, and varieties with longer grains have been cultivated. Such as Heilongjiang Wuchang's "Potato", Ningxia fragrant rice "Agriculture 843" and so on. There are many correlations between grain shape and the yield and quality of rice. It is also one of the hot spots for breeders and biologists to further study and use the excellent grain shape and gene. The traditional grain growth of indica rice will inevitably affect the appearance, processing, cooking and eating quality. Therefore, the study of the influence of grain shape changes on the quality of Japonica rice is of great significance to the genetic breeding of indica rice. Grain shape of rice has a certain influence on the appearance quality of rice. The quality of appearance lower than that of rice is generally observed through naked eyes. However, in order to be more accurate and reliable, the rice appearance quality detector can be used for effective detection.
The traditional rice in Ningxia is ovoid and broad oval, and it is a typical japonica rice type. The rice produced is short-round, shiny, and of high quality. It is known as “Pearl Rice Outside the Pearl†and is renowned in the surrounding provinces and regions. Its quality can be comparable to that of Northeast Rice. In recent years, with the development of society and the improvement of people’s living standards, people’s consumption demands for rice have become higher and higher, and rice that is both good-looking and tasty has gradually become popular in the market. The long grain shape of Japonica rice has a significant effect on improving the appearance quality of rice.
The unique geographical, climatic and irrigation conditions of the Ningxia Irrigation District in the Yellow River provide the basis for the production of the famous Ningxia rice. However, the early Ningxia rice breeding target was mainly high-yield, and most of the widely-cultivated varieties showed high yield but poor quality (mainly chalkiness, chalkiness, and low percentage of whole millet), which greatly affected rice. The commodity nature. In recent years, with the development of production and the improvement of people’s living standards, people have focused more on good-looking rice consumption. In response to the needs of the market, with the implementation of the first- and second-phase high-quality rice projects of government departments, the breeders highlighted the “high-quality†cultivation of new varieties, which improved the quality of Ningxia rice, especially its appearance.
The test results of the rice appearance quality tester found that the aspect ratio of rice grains was significantly negatively correlated with chalky grain rate and chalkiness, and had a significant negative correlation with brown rice rate, gel consistency, and amylose content; the ratio of length to width of rice grains was The fat content showed a significant positive correlation. It is further shown that the change of grain shape can significantly change the appearance quality of rice, and at the same time, the change of grain shape has a certain influence on processing, cooking, and nutritional quality.
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