| Chinese chestnut is China's important economic species and it is important woody grain and dried fruits.Chestnut not only has the rich edible value and medicinal value,but also has a long history in our country,which was regarded as China's important economic export products.Chinese chestnut germplasm resources are rich.Wide distribution,economic characters throw out confounding,collecting and investigating chestnut germplasm resource and carrying on the comprehensive evaluation has important research significance.In this paper,102 chestnut chestnut germplasms' flower,leaf,nut,thorn bud and the main nutritional quality and other related 30 traits indiators was analyzed by using the combined method of subordinate function-factor analysis and weight assignment method.At the last,it is concluded that the comprehensive ranking of 102 Chinese chestnut resources,then to have a high quality selection and destination selection.At the same time,there were also discussed the leaf and nuts phenotypic morphology of different Chinese chestnut from the same population and different population,and the high photosynthetic efficiency difference of 11 Chinese chestnut,and the seed setting about 4 Southern varieties crossbreeding with Qianxi native varieties.It was expected to provide certain reference basis of comprehensive evaluation of chestnut chestnut gennplasm resources and high photosynthetic efficiency in the future.This research mainly obtained conclusions are as follows:(1)The models were constructed through combining the membership function and factor analysis method,which were as follow:Mathematical model of Chinese chestnut male and female flowers:Fy=(58.116F1+32.634F2)/100.Mathematical model of Chinese chestnut leave:Fv=(41.145F1+30.671F2+41.145F3)/100.Mathematical model of Chinese chestnut nuts:Fv=(72.225F1+188111FZ)/1 00.Mathematical model of Chinese chestnut thorns bract:Fv=(81.079F1)/100(F1,F2 and F3 as common factors).Through the weight assignment method,a mathematic model of the Chinese chestnut main nutritional quality evaluation(X for nutrition evaluation index):Fv=0.23*X24+0.08*X25+0.32*X26+0.32*X27+0.10*X28+0.025*X29+0.04*X30.Based 011 computing the corresponding composite scores,then it is concluded that the comprehensive ranking of 102 Chinese chestnut germplasm.(2)The number of males in 'Changli 10','Changli 3' and 'Dongling Mingzhu' was larger.'Zunyu','Luyue Zaofeng','Qianxi 5' and 'Qianxi 31' has high male and female ratio,also has less number of male flowers.The length of male flowers in 'Duanhua','Luotian Zhongchili' and 'Erdao Guan l ' was shorter.'Zunyu' has high female flowers,more special(3)'Cuijia Buzi 2399','Changli 3' and 'Yugou 1' for high soluble sugar germplasm;'Yanchang','Changli 3' and 'Qianxi 4' for low fat germplasm;'Shifeng','Duanhua' and 'Xiaoshui Yu l' for high amylose germplasm;'Jingshu Hong','Changli 8' and 'Wangchang Gou' for high granulose germplasm;'Changli 1','Changli 3' and 'Changli 7' for high protein germplasm;'Huangpeng','Yufeng' and'Yugou 1' for high P germplasm;'Huaihuang','Bikou hong' and 'Yanshan Duanzhi' for high K germplasm;'Dongfeng','Bikou Hong' and 'Changan Huljianli' for high water germplasm(4)Chinese chestnut phenotypic characteristics of blade and nuts,in the same population between different germplasm(for example,Hebei population of 10 species)and between different populations both exist significant differences(5)By exploring the relationship among net photosynthetic rate morphological characteristics,biomass,and leaf structure of 11 Chinese chestnut,high photosynthetic efficiency difference of Chinese chestnut were discussed.Each index and net photosynthetic rate all has certain relations,except plant height.Among 11 copies of Chinese chestnut,the 'Yanshan zaofeng' has highest net photosynthetic rate,'Jingshu hong' has the lowest(6)By collecting pollen from 4 Southern varieties and crossbreeding with Qianxi native varieties,the cross compatibility and seed setting of Chinese chestnut 'varieties were studied,the results showed that'Xiangli 1 'better,'Huaqiao 2' and 'Xiangli 4' medium,'Xiangli 3' poor. |
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