食品感官评定多媒体课件系统的开发

以食品感官评定课件的开发为蓝本，详细探讨了多媒体课件系统的一般开发过程。根据软件工程中的生存周期方法学，多媒体课件的开发过程是分为若干个阶段进行，每个阶段都严格规定有相应的任务和要达到的目标，因而保证整个开发过程的完整性，连续性和可靠性。     

Effects of the 6/15 Robertsonian Translocation in Saanen Goats

Contents: The effects of a 6/15 Robertsonian translocation on growth and reproductive performance were investigated. One carrier Saanen buck was compared with 36 non-carrier Saanen sires. No significant effect was observed on daily growth, libido, or siminal characteristics. Fertility rate and prolificacy of the carrier and normal males were 58.3% and 1.53 ± 0.79 (m ± sd) vs 48.9% and 1.36 ± 0.58 respectively (p > 0.05 ).
Kidding rate and prolificacy of 30 normal and 32 heterozygous daughters of this carrier buck were 60% vs 59% (p > 0.05) and 1.47 ± 0.57 vs 1.34 ± 0.48 (p > 0.05) respectively. Normal does always demonstrated a higher prolificacy (p > 0.05) independent of breeding pratices and service rank .
Inhalt: Einfluß der 6/15 Robertsonschen Translokation bei Saanenziegen
Es wurde der Einfluß einer 6/15 Robertsonschen Translokation auf Wachstum und Fortpflanzung sleistung untersucht. Ein Trägertier (Saanenbock) wurde mit 36 Nichtträgern verglichen. Es wurden keine Effekte hinsichtlich täglichen Wachstums, Libido und Spermacharakteristika festgestellt. Befruchtungsprozentsatz und Nachkommenrate des Trägertieres und der normalen Böcke war 58,3% und 1,53 ± 0,79 gegenüber 1,36 ± 0,58 (p ±0,05). Ablammrate und Nachkommensrate von 30 normalen und 32 heterozygoten Töchtern des Trägerbocks betrugen 60% gegenüber 59% (p ± 0.05) und 1,47 ± 0,57 gegenüber 1,34 ± 0,48 (p ± 0,05). Normale Ziegen zeigen höhere Nachkommensraten (p ± 0,05) unabhängig von Bedeckungspraxis und Besamungsfolge .     

高寒区耐频繁肉兔品种筛选试验

利用5.5个月的时间,对实施频密繁殖制度的当地5个品种的53只肉用母兔,进行频繁成绩测定,确定了加利福尼亚兔和新西兰白兔是高寒地区耐频繁的肉兔品种。     

小麦无融合生殖育种方法初探

经过10余年研究，从上万份不同类型小麦亲本及杂交后代中，鉴定、筛 选、培育出5种具有小麦无融合生殖特性的基因型材料，分别是：多苗材料，表现兼性无融合特点的材料，表现专性无融合生殖特点的材料，孤雌生殖材料，具有雌蕊材料。     

人为打破滞育对东亚小花蝽越冬成虫生殖的影响

东亚小花蝽是多种农作物害虫的捕食性天敌。实验表明,在２７℃、ＲＨ７０％、２４ｈ的光照条件下,可在３～４ｄ内终止其越冬成虫的滞育,所需时间极短,并对其生殖力的影响不大。     

猪繁殖与呼吸综合症病毒生物学特性

猪繁殖与呼吸综合征(PRRS)为当前危害世界养猪业的重要疾病之一.本文根据当前各国学者对此病原的研究成果从病毒的分类地位,形态、理化特性,组织分布,培养特性,免疫学特性,病毒的基因组成、表达及其功能,病毒蛋白及功能,基因组的遗传和变异作一个系统的综述.     

补饲能量蛋白饲料提高云岭山羊繁殖力研究

为探索提高云岭山羊繁殖力的营养措施及为制定饲养标准提供基础数据,在马鸣种山羊场选用450只繁殖母羊开展了繁殖母羊配种准备期、妊娠期、哺乳期时等能量5水平梯度蛋白和等蛋白5水平梯度能量对山羊繁殖力影响的试验研究。结果表明:云岭山羊放牧饲养仅能获得60%～80%的营养,补饲蛋白饲料可使云岭繁殖母羊第一情期发情率、产羔率、羔羊初生重、3月龄断奶重和成活率比对照组分别提高115.43%、94.56%、17.06%、17.94%和6.26%;补饲能量饲料提高的对应比例分别为108.60%、99.93%、12.80%、21.49%和6.88%。5水平等能量梯度蛋白饲料组中以蛋3组效果最好,5水平等蛋白梯度能量饲料组中以能9组效果最好。方差分析结果显示:补饲蛋白、能量饲料与对照组的体增重、繁殖率差异极显著(P<0.01);蛋3组与蛋1、蛋2组,能9、能8组与能6、能7组的体增重、繁殖率差异显著(P<0.05)。建议对云岭山羊繁殖母羊在空怀和妊娠前期、妊娠后期、哺乳期按每天每千克体重分别供给DCP2.72g、2.86g、3.66g;DE0.37MJ、0.41MJ、0.48MJ的日粮。     

Evaluation of Strawberry Genotypes for Chaetosiphon fragaefolii (Strawberry Aphid) Preference

ABSTRACT

Thirty-one strawberry genotypes were evaluated for supporting the reproductive success of the strawberry aphid (Chaetosiphon fragaefolii), a vector of several strawberry viruses. A pure colony of C. fragaefolii was initiated from eggs collected from field strawberry leaves in Fall 2013. In Spring 2014 greenhouse-grown strawberry plants with four to five leaves were placed in screened cages (16 genotypes/cage) and five aphids were placed on each plant. After 30–32 days, the number of aphids in each of four developmental stages was counted on each plant. Total aphid numbers/plant ranged from a mean of 33 on Fragaria chiloensis CFRA 48 (PI 551459) to 279 on F. × ananassa ‘AAC Lila’. Cultivars with relatively low numbers of aphids included ‘Bounty’ (106 aphids), ‘Mira’ (114 aphids), and ‘Annapolis’ (115 aphids). This experiment, part of a larger project on aphids and virus diseases associated with the cultivated strawberry, will inform decisions in the strawberry breeding program.     

Conception rates in farm mink (Neovison vison) in relation to first mating date,age and color variety

The aim of the study was to analyze the effects of the first mating date, age and color variety on the conception rates in farm mink. We analyzed female mink reproductive performance in 492 Sapphire and 463 Standard Black females over 3 or 4 years. The analysis included the number of inefficient matings, the interval between the first inefficient mating and the efficient mating (copulation) and the conception rates. The results show a significant effect of female's age and color variety on the conception rates. The youngest, yearling females of either color needed a higher number of matings per conception, as compared to older, 2‐ and 3‐year‐old females. Black females demonstrated a higher number of inefficient matings (1.066), as compared with Sapphires (0.730). Yearling females were most often mated from 1 to 10 March, and older females from 11 to 20 March. Older females achieved better conception rates than the yearlings. Dates between 11 and 25 March proved to be the optimum for the first mating, since the highest conception rates were observed if the females had mated during this period.