Abstract: Morphological traits and main nutritional components,such as yield,average nut weight,content of total sugar,starch,protein,were examined.Genetic variation of nut morphological traits was studied.The results showed that,there were significant differences among crossed chestnut progenies.Some botanical characteristics,including nut height,nut width and starch content,water content,protein content,were relatively stable with variation coefficient(CV)of lower than 10%,nut thickness and fat content were also stable with CV of lower than 15% in all crossed chestnut progenies.The other botanical characteristics,such as yield,average nut weight and total sugar content,fiber content,had great genetic variation with CV of more than 15%.The range of yield varied from 84.40-2006.40 g with CV 82.95%,average nut weight varied form 2.99-13.30 g with CV 23.79% in all progenies.The content of total sugar in overall level had very great diversity with CV 52.04%.The study also discovered that,variation degree of yield was similar and average nut weight was different in crossed chestnut progenies with same female parent,and opposite result appeared in crossed progenies with same male parent.The differences maybe correlated with biological characteristics of female parent and xenia effect.Finally,3 individuals with high yield,high total sugar content and big nut with conical burs,respectively,were screened according to the results.

Key words: Chestnut, Progeny, Morphological traits, Nut, Genetic variation

CLC Number: 

• S664.2