In the present study, analysis of 42 gene loci of native pigs in Southwest China were carried out by meansof horizontal starch gel electrophoresis. Genotype and gene frequency were general1y similar, the polymor-phism was found only in Tf. Hp. Amy-1. CEs. 6PGD and EsD.Genetic variability was quantified as follows: the proportion of polymprphism loci(P) and the averageheterozygosity (H) were 0. 0714 and 0. 051, respectively. These values were low comparing to those ofdomestic pigs reported. Using the gene frequencies of the 42 loci, the genetic distance between six popula-tions were calculated by two formulae of Nei and Rogers, and UPGMA dendrogram were made. From thedendrogram, it is clear that Xiang pigs is far distanced from other pigs.

Through investigations of original growing area,tests of introduction variety,cutting tests and seed germination,the reproduction of T．rupestris and expanding patterns of the species group were studied．Results showed that there were two ways of reproduction in T．rupestris．One way was sexual reproduction．The other way was asexual reproduction．Due to bad habit condition in the original growing area the sexual reproductive abilityof T．rupestris became very weak and expanding of the species group mainly depended upon the asexual reproduction．Under artificial cultivation in BeiJing both ways of the sexual and asexual reproductions of T．rupestris were normal．

Sixteen taxa of Aspergillus: A. versitolor(Vuill.) Tiraboschi var. Versicolor, A. versicolor var. protu-berus (Mubtanjola -- Cvetkovic) Kozakiewica, A.sydowii (Bain. & Sart.) Thom & Church, A. ustus(Bain.) Thom & Church , A. terreus Thom apud Thom & Church var. terreus, A. terreus var. aureus Thom & Raper, A. flavipes(Bain. & Sart.) Thom & Church, A. wentii Wehmer, A. flavus Link var.flavus, A. flavus var. columnaris Raper & Fennell, A. tamarii Kita,A. carbonarius (Bain.) Thom,A.niger van Tighem, A. awamori Nakazawa, A. tubingensis (Schober)Mosseray and A. japonicus Saito.were reported on this paper

ipening is a complex developmental process involving changes in the biochemistry,physiology and geneexpression of the fruit．Tomato polygalacturonase(PG;E．C．3．2．1．15)is expressed only during the ripen - ing stage of fruit development and has a major role in cell wall degradation．To demonstrate the function ofPG in the fruit ripening,a chimaeric gene containing the cauliflower mosaic virus 35S promoter and a full - length PG 1．9kb cDNA in reverse orientation was constructed．The construct was integrated into thetomato genome by Agrobacterium - mediated transformation．Examination by PCR showed that the chi - maeric antisense PG gene was stably integrated into the transgenic tomato chromosome．Furthermore,analysis of transcription in the mature transgenic tomato fruits indicated the expression of the antisense PGgene and a remarkable reduction in PG mRNA．These results demonstrated the ability of antisense PGgene to inhibit fruit endogenous PG gene expression in the whole tomato plants．The function of PG in thefruit softening was discussed．The approach which we have used to study fruit ripening will have generalapplicability in agricultural production．

This paper synthesizes major developments and conclusions of studies on Scleratinian coral communitystructure in last 20 years in the world, puts forward the problems exiting in the studies and analyses thecauses of unconsistence in the studies of different spatial scales and the flaws of "intermediate disturbancehypothesis";Finally, combining with need's of the development of basic theortical and applied studies, thispaper probes into the prospects of the studies on Sceratinian coral community structure.

A investigation of the current range and status of Green Peafowl (Pavo muticus imperator) in China wasconducted from 1991 to 1993. This paper presents the main results of the investigation. In china GreenPesfowl currently only ranges in west, south, and center of Yunnan province, including Luxi,Longchuan, Ruili, Longlin, Changning, Lincang, Yunxian, Shuangjiang, Fengqing, Yongde, Gengma,Cangyuan, Zhenkang, Weishan, Simao, Pu'er, Jingdong, Jinggu, Zhenyuan, Mojiang, Menghai,Jinghong, Mengla, Jinping, Shiping , Luchun, Mile, Xinping, Shuangbai, Nanhua, Lufeng, Yao' an,Yongren counties and Chuxiong city. We were also told by local people that Green peafowl was found inYezhi, Weixi county, Tuoding and Benzilan, Deqin county, but need further confirmation. Ruili,Longchuan, Changning, Yongde, Xinping, Pu'er, Mojiang, Jingdong, Chuxiong, Shuangbai, Nanhuaeach has individual more than 30. Luxi, Longlin, Yunxian, Lincang, Fengqing, Shuangjiang, Cangyuan,Zhenkang, Gengma, Jinggu, Yao'an, Yongren, Lufeng, Jinghong, Menghai, Mengla, Weishan countieseach has individual less than 30. Green Peafowl probably disappeared in Luishui, Tengchong, Yingjiang,Mengzi, and Hekou counties. According to estimation the individual size of Green Peafowl in China isabout 800～1100.