Study was conducted on the change of fresh weight,moisture and the aril total-sugar of logan before and after the fruit cluster nutation by choosing the extremely serotinous variety-Lidongben.

From metaphase of the 1990s to beginning of this century, the symptom "small grains and erect panicles"(SGP) in rice was widespread in most Oryza sativa cultivars in Jiangsu Province, which generally caused yield loss ranging from 10% to 30%, even as high as 50% in heavily infected regions.

In this study,a set of 182 BILs from a backcross of Koshihikari(japoncia)/Kasalath(indica)//Koshihikari was used for analysis of quantitative trait loci(QTLs) controlling panicle exsertion and related plant-height in rice.

Recent years,small grains and erect panicle occurred in many rice varieties on a large scale in Jiangsu Province.