Genetic Diversity and Evolutionary Tendency Detected by Isozyme, RFLP and RAPD Markers in the Wild and Cultivated Soybean in China     

参考文献： 《中国农业科学》2000,(1):48-55

A large numbers of samples of wild soybean accessions and cultivated soybean landraces from various areas in China were analyzed by isozyrme, cytoplasmic DNA RFLP and nuclear DNA RAPD markers in order to reveal their genetic diversity. Greater comprehensive genetic diversity was detected in wild soybean than in cultivated soybean. The genetic plentifulness and the genetic dispersion of wild soybean were 180 (95. 2％) and 0. 2891 while those of cultivated soybean were 154(81.5％) and 0. 2091,respectively. On the most loci, especially on isozyme loci Idh1, Aph, Idh2,and Dia, cytoplasmic DNA RFLP loci cp Ⅰ , cp Ⅲ, mt Ⅳ a and mt Ⅳ b, and nuclear RAPD loci OPAP4-8, OPAP5-1, OPAP9-8 and OPAP20-8, the wild soybeans djffered remarkably from the cultivated ones in allele frequency. These markers could be used in further study on the evolution and origin of the cultivated soybean.  相似文献   

猪败血型链球菌病的诊疗报告     

王俊江  卢丰德 《中国兽药杂志》2006,40(12):57-57,50

本文阐述了猪链球菌病的临床症状、实验室检验及防治方法，力求为科学防控猪链球菌病提供有益的探索和参考。  相似文献   

田间条件下大豆气孔特性的初步研究   总被引：6，自引：1，他引：5  

游明安  上堂秀一 《大豆科学》1992,11(2):152-158

对12个中国和日本大豆品种在田间两种种植密度下结荚期气孔特性研究表明:气孔密度(SD)、气孔长度(SL)和单位叶面积的气孔总长度(SD×SL)在主茎叶位间、叶片正背面间有显著差异。种植密度间SD和SD×SL差异显著,但SL无差异。品种间SL和SD×SL差异显著,但SD的品种间差异受密度影响。SD与SL显著负相关,与SD×SL显著正相关。光合速率在叶位间和品种×叶位间与SD和SD×SL显著正相关,与SL显著负相关。  相似文献   

四川“榨菜”花叶病毒鉴定及不同季节和地点发生情况调查   总被引：4，自引：0，他引：4  

李新予  蔡岳松 《植物病理学报》1992,22(3):275-276

 四川"榨菜"以其鲜、香、嫩、脆特色享誉全国,但原料茎瘤芥花叶病为害严重,流行年减产四成以上。王廷泉(1962年)对其病原、流行规律及防治曾作研究,但大面积的病原种类和分布尚无报导。  相似文献   

夏大豆品种抗豆秆黑潜蝇抗源鉴定   总被引：3，自引：0，他引：3  

夏基康  盖钧镒  崔章林  浦奉华 《植物保护学报》1987,14(2):115-118

在1983—1985年,对南方4582个大豆品种进行了抗蝇性抗源鉴定。初筛时,于1983年8月和10月分别对2064个和3610个大豆品种进行测验。根据每品种10株的平均虫量,筛选出855个品种,连同新参加筛选的972份材料和感性品种,设立无重复的试区,于1984年8月再次进行筛选。将从第二次筛选出的219个品种于1985年设立了3次重复的试区,以虫量结合虫道进行鉴定,从中选出15个品种。这些材料可以供抗性机制和抗蝇育种研究之用。本文尚就叶柄的含虫量,主茎虫道长度与抗性分级标准的关系进行了讨论。  相似文献   

Partially defatted black soldier fly larva meal inclusion in piglet diets: effects on the growth performance,nutrient digestibility,blood profile,gut morphology and histological features     

Ilaria Biasato  Manuela Renna  Francesco Gai  Sihem Dabbou  Marco Meneguz  Giovanni Perona  Silvia Martinez  Ana Cristina Barroeta Lajusticia  Stefania Bergagna  Luca Sardi  Maria Teresa Capucchio  Enrico Bressan  Andrea Dama  Achille Schiavone  Laura Gasco 《畜牧与生物技术杂志(英文版)》2019,(3)

Background: The aim of this trial was to investigate the effects of different inclusion levels of a partial y defatted black soldier fly(BSF, Hermetia il ucens L.) larva meal on the growth performance, nutrient digestibility, blood profile, gut morphology and histological features of piglets. A total of 48 newly weaned piglets were individual y weighed(initial body weight(IBW): 6.1 ± 0.16 kg) and randomly al ocated to 3 dietary treatments(4 boxes as replicates/treatment and 4 animals/box). BSF larva meal was included at increasing levels(0% [BSF0], 5% [BSF5] and 10% [BSF10]) in isonitrogenous and isoenergetic diets formulated for two feeding phases: I(from d 1 to d 23) and I(from d 24 to d 61). The weight gain(WG), average daily gain(ADG), average daily feed intake(ADFI) and feed conversion ratio(FCR) were calculated for each feeding phase and for the whole trial. The haematochemical parameters and nutrient digestibility of the piglets were also evaluated. A total of 3 piglets per box were slaughtered on d 61 and the slaughtered piglets were submitted to morphometric investigations and histopathological examinations.Results: No overal significant differences were observed for growth performance(P 0.05), except for the ADFI of phase I, which showed a linear response to increasing BSF meal levels(P 0.05, maximum for the BSF10 group). Dietary BSF meal inclusion did not significantly influence the blood profile, except as far as monocytes and neutrophils are concerned,and these showed a linear and quadratic response, respectively, to increasing BSF meal levels(P 0.05, maximum for the BSF10 and BSF5 groups, respectively). On the other hand, the nutrient digestibility, gut morphology and histological features were not affected by dietary BSF meal inclusion(P 0.05).Conclusions: The obtained results show that a partial y defatted BSF larva meal can be used as a feed ingredient in diets for weaned piglets without negatively affecting their growth performance, nutrient digestibility, blood profile, gut morphology or histological features.  相似文献   

Effect of dietary supplementation with insect fats on growth performance,digestive efficiency and health of rabbits     

Laura Gasco  Sihem Dabbou  Angela Trocino  Gerolamo Xiccato  Maria Teresa Capucchio  Ilaria Biasato  Daniela Dezzutto  Marco Birolo  Marco Meneguz  Achille Schiavone  Francesco Gai 《畜牧与生物技术杂志(英文版)》2019,(2)

Background: The present work aimed at evaluating the effect of the dietary replacement of soybean oil(S) by two types of insect fats extracted from black soldier fly larvae(H, Hermetia il ucens L.) and yel ow mealworm larvae(T, Tenebrio molitor L.) on growth performance, nutrient digestibility, blood parameters, intestinal morphology and health of growing rabbits.Methods: At weaning, 200 crossbred rabbits(36 days old) were allotted to five dietary treatments(40 rabbits/group): a control diet(C) containing 1.5% of soybean oil and four experimental diets where soybean oil was partially(50%) or totally(100%) substituted by H(H50 and H100) or T(T50 and T100) fats. Total tract digestibility was evaluated on 12 rabbits per treatment. The growth trial lasted 41 d and, at slaughtering(78 days old), blood samples were collected from 15 rabbits per treatment, morphometric analyses were performed on duodenum, jejunum and ileum mucosa,and samples of liver, spleen and kidney were submitted to histological evaluation.Results: No difference was observed between the control and the experimental groups fed insect fats in terms of performance, morbidity, mortality and blood variables. The addition of H and T fats did not influence apparent digestibility coefficients of dry matter, protein, ether extract, fibre fractions and gross energy. Gut morphometric indices and organ histopathology were not affected by dietary inclusion of H and T fats.Conclusions: H and T fats are suitable sources of lipid in rabbit diets to replace soybean oil without any detrimental effect on growth performance, apparent digestibility, gut mucosa traits and health.  相似文献   

基于太阳能发电的农业物联网多功能供电系统     

杨昌登  盖新鹏  闫星源  张航  李松  任守华 《黑龙江八一农垦大学学报》2020,32(2):103-110

  相似文献   

智能马铃薯堆垛机的设计     

孙景彬  盖金星  李学强  王相友  李栋 《农机化研究》2017,(10)

马铃薯收获后需要对其入库贮藏,目前马铃薯入库堆垛机械的作业效率较低、成本高,需要大量人工辅助作业。针对这一系列问题,设计了一款具有较高作业效率的智能马铃薯堆垛机。该机可根据所需的堆垛高度进行作业,控制方便,伤薯率低,为马铃薯的长时间贮藏提供了保障。对样机做了相关试验,结果表明:该机满足堆垛要求,且堆垛过程中的伤薯率明显降低,可以控制在1%以下。因此,此款机器的设计对解决农忙时节用工荒、提高马铃薯的入库效率及马铃薯的贮藏品质具有重要意义。  相似文献   

制约中国水产业经济发展方式转变的因素及对策——以青岛市为例     

盖明媚  刘学忠 《中国农学通报》2012,28(26):146-152

改革开放以来中国水产业发展取得了巨大成就，近几年各主产区也在积极转换发展方式，取得了一定成效，但目前水产业还没有摆脱依靠生产规模扩张和大量消耗自然资源为主的粗放型经营方式。本研究以青岛市为例分析了制约水产业经济发展方式转变的因素，提出了体制创新、科技创新、提高劳动者素质等加快水产业经济发展方式转变的对策。  相似文献