不同产地南果梨果实品质比较

用5个主要南果梨产区的南果梨进行试验,重点测果实糖分组成.结果表明:南果梨果实的糖分组成以果糖为主,占总糖的50%以上;不同产地南果梨果实总糖、可滴定酸、Vc及糖组分含量差异较大,阜新地区南果梨总糖及果糖含量最高,分别为190.27、99.65mg/mL,海城地区南果梨总糖及果糖含量最低,分别为97.74、60.24mg/mL,虽然鞍山地区是南果梨的优势产区,但鞍山地区的南果梨总糖及果糖含量却不是最高的,这个结果与生产中反映的鞍山南果梨果实品质近年来有所下降相符合.     

青稞产量性状的基因型与环境互作分析

对不同海拔青稞（Hordeum vulgare L.）产量性状相关数据进行分析,分别计算不同品种产量性状的平均值及差异显著性水平;计算不同地区产量性状的平均值,并进行多重比较;估算其遗传方差,环境方差及遗传环境互作方差,比较遗传及环境对青稞产量性状的影响。结果表明,青稞的实粒数、千粒重在每个品种中差异都明显;玉龙地区的环境更有利于有效穗和产量的增加;千粒重主要受遗传控制,其次受基因与环境互作影响较大,环境影响最小。有效穗、实粒数、产量等产量性状受环境影响较大。     

原生蔬菜“天绿香”高产栽培技术

介绍原生蔬菜天绿香的生物学特性及其营养成分,结合田间生产实践总结其高产栽培技术要点,主要包括育苗、田间种植、生长期管理、采收、越冬管理等方面内容.     

5个梨品种在熊岳地区的生长表现及果实性状评价

为优化熊岳地区梨品种结构,同时为梨育种工作提供前期准备,2009年,辽宁省果树科学研究所梨课题从吉林省农科院果树所引进5个抗寒晚熟梨新品种‘蔗梨’‘寒红’‘寒香’‘寒露’和‘寒酥’,通过多年的生物学调查和室内测试分析,比较其物候期、生长结果习性和果实品质,认为‘寒红’‘寒香’‘蔗梨’在熊岳地区表现较好,可以适当发展,同时可作为育种材料在今后的杂交育种中应用.     

Genetics of Fertility Restoration in Cytoplasmic Male Sterile Pepper

Pepper hybrid seeds production using male sterility could lower cost by reducing time and labour, and increase the genetic purity of the F1 seeds. To investigate the genetics of fertility restoration of the Peterson cytoplasmic sterility in pepper, a doubled haploid population of 115 pepper lines obtained from anther culture of the F1 hybrid between Yolo Wonder （sterility maintainer line） and Perennial （fertility restorer line） and the parental lines were test-crossed by 77013A （a strict cytoplasmic-genic male sterile line）. The fertility of the test-crossed lines was assessed in greenhouse and open field with the following three criteria： pollen index （PI, visual estimation of pollen amount per flower）, pollen number （PN, pollen counting under microscope）, and seed number （SN, the number of seeds per fruit in open pollination）. Correlations between the each couple of criteria within, as well as between the cultivation methods ranged from 0.55 to 0.84. Analysis of variance showed that the genotype （DH line） and environment were the significant sources of variation of the fertility. Narrow sense of heritance of fertility restoration ranged from 0.38 to 0.92, depending on the criteria and environment. The distribution of the progeny was continuous between the parental genotypes indicating the quantitative inheritance of fertility restoration. Inferred from segregation according to Snape et al.（1984）, the number of segregating genes was estimated to be that three to four genetic factors were involved in pollen traits （PI and PN） and five to eight genetic factors in seed production （SN）. The heredity analysis of the CMS will be helpful for understanding of the genetic mechanism of the fertility restoration and the exploitation of the CMS in hybrid seed production.     

甲氨基阿维菌素与阿维菌素对5种农业害虫的毒力测定

采用浸渍法、饲料混药法和药膜法分别测定了甲氨基阿维菌素与阿维菌素对棉铃虫、杂拟谷盗、斑潜蝇、棉红蜘蛛、蚜虫等 5种重要农业害虫的毒力。结果表明 :甲氨基阿维菌素对棉铃虫的毒力均高于阿维菌素。饲料混药法测定 ,甲氨基阿维菌素对菊酯类杀虫剂敏感的棉铃虫毒力分别是阿维菌素的 2 .0 (初孵幼虫 )、3.6(三龄幼虫 )和 8.4(四龄幼虫 )倍 (LC50 比 ) ;浸渍法测定 ,甲氨基阿维菌素分别是阿维菌素的 78.5 (卵 )、2 5 .9(二龄幼虫 )和 3.7(三龄幼虫 )倍。甲氨基阿维菌素对菊酯类抗性棉铃虫毒力分别是阿维菌素的 2 5 .5 (二龄幼虫 )和 3.9倍 (三龄幼虫 )。甲氨基阿维菌素对蚜虫、斑潜蝇幼虫、棉红蜘蛛的毒力分别是阿维菌素的 1 .9(甘蓝蚜 )、2 .4(棉蚜 )、2 .7(桃蚜 )、5 .7(斑潜蝇幼虫 )和 3.6(棉红蜘蛛 )倍。阿维菌素对斑潜蝇成虫触杀毒力是甲氨基阿维菌素的 37.1倍。甲氨基阿维菌素对杂拟谷盗毒力高于阿维菌素 ,但二者都没有辛硫磷效果好     

‘红丰梨’主要性状及栽培技术研究

‘红丰梨’是红色软肉杂交品种，平均单果重210 g，软肉多汁，含可溶性固形物13.3%，总糖10.84%，总酸0.38%，维生素C 2.29 mg/100 g，酸甜味浓，品质上。果实常温下可贮20 d，经后熟风味偏洋梨香味。果实发育期110 d。是一个优质、早熟、丰产、抗病的红色软肉梨新品种。