关键词: 野生二粒小麦, 蛋白质含量, 千粒重, 库容, 遗传多样性, 可利用性

Abstract: In order to search excellent germplasm for breeding new wheat varieties characterized by high protein content,high yield,and cowbined features.The grain traits including protein content,1000-grain weight,length,width,thickness and volume (length×width×thickness) of 110 genotypes of wild emmer (Triticum dicoccoides,AABB,2n=4x=28) from Israel were studied in this paper.The results suggested that relatively high genetic diversities of the grain traits exist in wild emmer.The grain protein content,1000-grain weight,length,width,thickness,and length×width×thickness,varied from 13.17% to 27.20% with the mean of 19.89%,from 7.95g to 33.02g with the mean of 20.20g,from 6.59mm to 10.16mm with the mean of 8.60mm,from 1.21mm to 2.77mm with the mean of 2.11mm,from 1.67mm to 2.83mm with the mean of 2.33mm,and from 16.16mm³ to 71.21mm³ with the mean of 43.78mm³,respectively.In the 110 tested genotypes,the protein content was significantly negative correlated to the 1000-grain weight (r=-0.254,P<0.01),while significantly positive correlation was obtained between the 1000-grain weight and the sink traits such as grain length,width,thickness and volume,and between the sink traits themselves,as well (P<0.001).However,the consistent relationship between grain protein content and 1000-grain weight was observed in some materials which have high protein content,1000-grain weight,and volume concurrently.Compared with common wheat,excellent genetic resources of high protein content and big sink were abound in wild emmer.

Key words: Triticum dicoccoides, protein content, 1000-grain weight, grain sink, genetic diversity, potential utilization