Searching Development-deficient Genes in Edible Mushroom by Self-crossing

[Objective] This study aimed to investigate the effect of mating factor recombination on the development of edible mushroom,and explore the possibility for using self-crossing to breed sporeless/low sporing mushroom strains.[Method] Selecting Agrocybe salicacola strain YAASM0711 as the self-crossing material,six self-crossed combinations were directionally constructed with single spore growth rate as an indicator,to carry out comprehensive analysis of the qualitative traits（color,deformity and growth characteristics）,quantitative traits（shape,yield,size and number of fruit bodies） and mating types of its self-crossed F1 progenies.[Result] After mating factor recombination,self-crossed single spore progenies showed serious genetic differentiation,the average mycelial growth rate and agronomic traits of inbred progenies were lower than those of the parents.The phenotype in fruiting body formation could be divided into normal fruiting and abnormal fruiting（including abnormal fruiting bodies,sporeless or low sporing fruiting bodies,no fruiting）.To be specific,18% self-crossed strains had superior agronomic traits to the parents,which can be used for selecting predominant strains from self-crossed progeny populations based on different breeding purposes.[Conclusion] The genes controlling mycelial growth rate of single spore were linked with mating factors.The mating factor-recombinant single spore strains could be selected according to the correlation between mating type and growth rate.The fruiting result of self-crossed strains indicated that the genes related to sporeless/low sporing development were recessive.Not only genetic materials harboring development-deficient genes in edible mushroom can be obtained by self-crossing,but also the sporeless/low sporing mutant strains with important application prospects can be bred.

如何培养自销能力

自我推销是职高学生获取就业机会的手段。如何培养学生的自我推销能力呢?我以为:第一、要更新观念,形成自我推销意识。要不失时机地教育学生,使他们知道,学校有人才预测,定好专业,提高质量,培养能力的责任,但没有为他们分配工作的权力;在社会主义市场经济中,用人单位对员工有选择、聘任、解聘的权利和自由,劳动者有择业、就业、转业、辞职的权利和自由待业—就业—待业这一循环是当今劳动制度的特色。还可以利用报刊、电影、电视,让学生了解港台、国外人们自谋职业、自行择业的情况。

否定艺术的音乐类型

▲徐亮在《音乐美学的几个问题》(载《西北民族学院学报》90年第一期)一文中写道: 沉行音乐中有很多优秀杰作,也有不少劣作,从美学的角度看,应当提供一种艺术的标准,能够指出哪些作品尽管新、奇、怪,却是艺术,而哪些则根卒不是。正是从这样一个美学的角度,我们在流行的音乐中要指出两种相当流行,但却否定艺术的音乐类型——这两种音乐类型可以称作“发泄型”的和“矫饰型”的。 所谓“发泄型”是那种把音乐当作情绪喷发器的作品。这些作品是把音乐当作一种刺激,而把听众当成被刺激物。声嘶力竭的声带,强烈而持久的打击器效果,单一持续的强节奏。

逢蒙·穷门《左传》新释一则

古代的著名半神半人羿(后羿、夷羿)、死于谁手,在古籍中的记载,是否可以统一起来?这倒很值得作一番探讨。 《左传·襄公四年》云:“(寒)浞行媚于内,而施赂于外,愚弄其民,而虞羿于田。……羿犹不帐,将归自田,家众杀而亨之,以食其子。其子不忍食诸,死于穷门。” 这项记载告诉我们,杀羿的元凶是浞。但浞大约是幕后的“策划者”,直接杀害羿的凶手,则是“家众”(即“施赂于外”的“外”)。

对实验结果评价的探讨

在做实验时,必须评价实验结果的好坏,找到误差过大的原因和改进的方向,才能得到满意的结果,可见,对实验误差的分析评价是非常重要的。以“动量守恒定律验证”这个实验为例。它是用两个质量各为M1和M2的滑块在气轨上碰撞来证明的。开始时让M2静止,即V2l=0,由动量守恒定律得:

日本果汁进口贸易斗争激烈

日本几家大的康采恩公司当时为占领足够的市场而对前不久才允许的果汁自由进口进行了激列的斗争。但橙汁除外,它在1992年才允许自由进口。浓缩苹果汁去年进口18000吨,而今年汉在4月至6月就达到去年的进口量,其价格由每公斤350日元降至280—300日元。

2002春夏新流行情报

送旧迎新的时刻,你一定也在关心,应该把什么“Out Look”收进衣柜,应该添购什么“In things?”时尚密探,预先为你整理出2002春夏新秀的重点流行。 1.新浪漫主义 2002春夏的时装表情,Tom Ford说得好:“漂亮的时装在这个时候很重要,能为生活添上色彩和乐趣。”整个春夏时装大气候,于是弥漫着自由浪漫的气息,衣服线条倾向松软舒适,艳丽的色彩掩盖一片愁云惨雾的黑,琳琅满目的性感飘逸蕾丝与雪纺,化身充满Victorian Style、Empire line dresses与Grecian dresses等新浪漫风情。

花之香 茶之味——细味谷花茶

谷花茶,这是一个很美丽的名字。不过这茶里并没有谷花也没有谷子。有两种茶都被称为"谷花茶",它们都是采摘自田间谷花灿烂的季节,当中有一种"谷花茶"里面还确确实实的有美丽的花儿。

Sugarcane Requirement of Water and Effect of Fertigation on Sugarcane

The sugarcane is a main sugar crop in China. The seasonal drying is one of the problems that influence the improvement of output and quality of sugarcane in China. The experimental results for the water requirement and fertigation of the sugarcane showed, that the distribution of the rainfall in spring, autumn and winter, all could not suit the requirements for sugarcane growth. Detailedly, it can suit that sugarcane requirement of 74.4%, 68.6% and 35.7% respectively at seedling emerging stage, tillering stage and mature stage according to sugarcane growth. The drought has already limited the yield of sugarcane. Application of fertigation can enhance the fertilizer use efficiency, and it is also a water saving technique in sugarcane production.

Comparative analysis of coal and coal-shale intrinsic factors affecting spontaneous combustion

Coal and coal-shales tend to undergo spontaneous combustion under favourable atmospheric conditions. Spontaneous combustion liability index and intrinsic properties of coals and coal-shales varies between （above and below） coal seams. The spontaneous combustion liability index （obtained from the Wits-Ehac Index） and intrinsic properties （obtained from proximate, ultimate, and petrographic analysis） of fourteen samples representative of in situ coal （bituminous） and fourteen coal-shales obtained in Witbank coalfield, South Africa were experimentally studied. Comparative analysis of the relationships between the spontaneous combustion liability index and intrinsic properties of coals and coalshales were established to evaluate their effects on self-heating potential. The intrinsic properties show linear relationship with spontaneous combustion liability and therefore, identifies the factors affecting spontaneous combustion of these materials. The influence of coal-shales intrinsic properties towards spontaneous combustion liability shows higher correlation coefficients than the coals. Both coals and coal-shales show inertinite maceral as major constituents than the vitrinite and liptinite macerals, hence the reactivity of inertinite macerals may show greater influence on spontaneous combustion liability. A definite positive or negative trends exists between the intrinsic properties and spontaneous combustion liability index. This research is part of a larger project which is considering the influence of intrinsic properties of coals and coal-shales on spontaneous combustion liability.

Study of the spontaneous combustion mechanism in coalfield

Coalfield fire is prevalent in the world. especially in China, but the main rea- son of the fire in the coalfield is not clarity. So it’s difficult to fight the coalfield fire. Based on the model of outcrop spontaneous combustion in coalfield, that when the fringe coal-rock is break up by the alternation air-temperature, the coal is oxygenated and heat is emitted. Then around coal-rock is heated and break up. The air-leakage conditions are changed and the convection of air in the coal-rock is come into being. The self-ignition process of fringe coal-crock is developed to the deeper coal seam. The oxi- dation and emitting heat mechanics process of coal, breakage and air-leakage mechan- ics process of the coal-rock in the coalfield are theoretically analyzed.

Effects of Micro-Topographic Reestablishment on Paddy Impoundment and Rice Yield

From a perspective of cultivation measures, it was needed to develop a new paddy impoundment model to achieve higher rice yield with higher water utilization efficiency. This study was conducted to quantify the effect of ridge- tillage terrace ecological rice farming （RT）, bed ecological rice farming （B） and conventional ecological rice farming （CK） on the paddy impoundment model and rice yield, and determine dry matter accumulation （DMA）, rice yield, yield component, and parameters of the ridge tillage and the bed. The RT could be used to achieve the dual improvement in the capacity of natural precipitation storage and in soil aeration by dry-wet alternation damp irrigation. Water storage capacity in the RT was 29% higher than that of the CK and most of the water was stored in the ditch. The grain yield of each of different rice cultivars （except the cultivar Huanghuazhan in 2011） in the RT was significantly higher than that of the CK. The total DMA in the RT was 16.5% in 2011 and 28.2% in 2012 higher than that of the CK, respectively. The variation of DMA before and after the full-heading stage among rice cultivars was inconsistent. Consequently, the RT was an effective measurement of micro- topographic reestablishment for changing paddy impoundment model, increasing water storage capacity, especially the natural precipitation storage, and increasing rice yield.

偶得一首与编辑同人共勉

赤笔织嫁心不烦，亦将蓝墨灌自田。 红蓝并举齐头进，刊卓我优方谓贤。

开心旅途

早晨,你我他随爷爷奶奶爸爸妈妈与万缕朝阳一起蜂拥而至校门前;傍晚,你我他又随爷爷奶奶爸爸妈妈与万缕霞光一起分流而至游泳馆、舞蹈室、武术馆;周日的傍晚,你我他又随爷爷奶奶爸爸妈妈与千丝余辉分别相见在英语角、琴棋屋、语言班。这年年月月日日如斯之爱,饱含着爷爷奶奶爸爸妈妈怎样一份心情?

1975年的故事

老师们都夸阿云是个好学生。班主任田老师家里孩子多,妻子又常年生病,阿云就和同桌的阿殊一起到田老师家帮忙洗衣做饭,师母很受感动。毕业了,阿云没有考上高中。那时的阿云一心想读书,可又没书可读,田老师知道阿云的心思,每次去公社开会,总要到书店里转一转,给阿云买本好看的书。暑假里的一天。

今日上映:靓照诞生记

今年天娱群星的贺岁日历如约拍摄完成,最in的皮草豹纹风让人眼人一亮。坐等最后的成品出来,值得期待。好像现在拍摄新年日历照,成为了每年各大电视台、娱乐公司的一个惯例。各式各样风格的靓照让人看得眼花缭乱,但若要评出最有创意的日历照。

小兔感冒了

秋天到了,天气凉了,小兔一不注意,就感冒了。小兔躺(tang)在床上,又是流眼泪,又是打喷嚏(pen ti),鼻子不通,还发烧。妈妈请来了猴医生。