Studies on the Quality Trait Diversity and Its Correlation with Ecological Factor of Rice Landrance in Guangdong Province

In order to further improve evaluation and its effective utilization of landrace rice in Guangdong province,we used 2974 accessions catalogued in the national crop germplasm bank of which 9 rice quality traits as basic data to study.The geographic distribution of rice quality traits were analyzed,quality traits diversity among each and total rice area were compared,and the correlation between some ecological factors and rice quality traits were studied.The landrace rice in Guangdong province showed higher brown rice rate and milled rice rate,richer diversity of protein content,larger variation in gel consistency,and not many materials reached the national standard in amylose content.High-quality rice germplasm mainly distributed in south central rice area of Guangdong province.The result also showed that amylose content,gelatinization temperature,and gel consistency were the main impact indexs of rice quality formation.Humidity and temperature difference among areas were the main impact factors of rice quality variety formation.So,it is very important for high quality rice breeding and genetic background expanding to effectively use landrace rice in Guangdong province.