| Jute, annual herb of Tiliaceae Corchorus. Corohorus capsularis L. and Corohorus olitorius L. is usually used for cultivation. Breeding varieties of jute is traditionally aimed at fiber, and the systemic study on the jute's vegetable purpose is seldom.The genetic diversity of fouty-eight jute germplasm from different countries and regions were analyzed by morphology,and ISSR markers.The agronomic traits of these materials were also investigated.According to genetic diversity and the gronomic traits,10 jute verities were slected ,and their nutritional contents were also analyzed as corresponding national standards. The main results of this research are as follows:(1) The genetic similarity coefficient was 0.58 to 1.00 though the analysis of morphological markers of 48 jute germplasm.And the genetic diversity of these jute germplasm was fruitful.These materials showed a large genetic differences in leaf shape, stem shape, capsule and seed types. (2) The genetic similarity coefficient is 0.56 to 0.99 though ISSR markers of 48 varieties of jute germplasm.These jute germplasm are at high level of genetic diversity. The genetic diversity level of jute germplasm among species was higher than two Cultivated species. Within the two cultivated species, genetic differences are major in wild species and foreign species.The genetic difference between the Jute varieties in our country was relativy small.The resolution of ISSR molecular marker was higher than that of morphological markers ,which can distinguish the subtle differences among germplasm, and effectively evaluate the consumption of jute germplasm genetic diversity.(3) The growth rate of jute varieties was different in different growing periods. We should gather jute fresh leaf timely based on the growing rate. During the period of fast development harvest should be inccresed, which could further increase the branching number and prodution.(4) The content of nutritional ingredient of 10 accessions in edible jute were measured, which showed that there are extremely rich mineral elements in edible jute.It belongs to Ca ultra rich ,K and Zn rich vegetables, and Fe also higher contents. The edible jute was as 6.5 times Ca as spinach , as 8.9 times Ca as celery, as 2.3 times Ca as amaranth, as 12.3 times Ca as Chinese cabbage, as 13.4 times Ca as carrot , and as 3 times Ca as the average of ca-rich vegetables. Jute is low in the Zn/Cu and Na/K ratios, high high in the Ca/Mg ratios. Pople eat jute lesf regularly consumption can improve the proportion of mineral elements in the body. Therefore, it is suitable for people to add Ca, Fe, Zn and other mineral elements, especially suitable for children, the elderly and hypertension. Edible jute has rich in crude protein and amino acids.there are at least 17 amino acids. The contents of essential amino acids were relatively high and their stuctures were reasonable. There are a variety of delicious Amino acids in jute leaf. The content of medicinal amino acids of edible jute was much higher than that of other vegetables. The edible juteh has good nutritiue and health value.The difference of 10 varieties'nutrients was significant. The variety with the highest content of Ca was"Ribenchangguo",the variety with the highest content of Fe and K was NY/252C, the variety with highest content of Zn was JRC/699, and the variety with the least content of Na was Hezi8hao. The protein and amino acid of"Hezi8hao"was also the highest. Comprehensive Evaluation of 10 varieties indicated that"Hezi8hao",NY/252C, Tianhuangma"and JRC/699 were rich in various tested nutrients, and they have better nutritional quality and reasonable structured.(5)"Hezi8hao",NY/252C,"Tianhuangma",JRC/699 were choosed as good varieties of edible.They have good nutritional quality and agronomic traits."Ribenchangguo"was Singled out to improve Ca content and broaden the genetic basis of edible jute.This study laid the foundation for studying the nutrition , health effects and new variety breeding of edible Jute.
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