杂交晚粳甬优1号在鄞县的推广表现、品种特点及栽培技术

甬优１号由宁波市农科所与市种子公司合作育成 ,母本宁６７Ａ由滇Ｉ型细胞质源转育而成 ,父本Ｋ１７２２由Ｋ７２７０和宁６７(父本 )杂交系选而成。我县自１９９７年引进试验至２０００年首年推广 ,表现出生育期适宜、高产稳产、兼顾优质等特点。一、推广表现在１９９９年扩大试种２００ｈｍ２ 基础上 ,２０００年推广１６７０ｈｍ２。对５个镇实割产量与原当家品种宁６７(ＣＫ)对比调查如下 :２０００年甬优１号、宁６７产量比较表由上表可见 ,甬优１号在我县半山区、平原稻区、蔺草主栽区的５个镇均表现出较高产量 ,其产量比宁６７增１０…     

1-甲基环丙烯对草菇乙烯受体基因表达的影响

通过生物信息学的方法分析草菇(Volvariella volvacea)基因组的乙烯受体基因,并利用qRT-PCR检测1-甲基环丙烯(1-MCP)处理对草菇乙烯受体基因表达的影响,探究1-MCP对草菇保鲜的分子机理.结果 表明:在草菇基因组中共鉴定到5个乙烯受体编码基因(GME317、GME1797、GME2633、G...     

Genetic evidence for paternal inheritance of the chloroplast in four Australian Callitris species (Cupressaceae)

The mode of chloroplast inheritance was investigated in the four Australian conifer species; Callitris columellaris, C. intratropica, C. gracilis and C. verrucosa (Callitroideae, Cupressaceae), as a basis for future use of chloroplast genetic markers for the genus. Open-pollinated seeds and the foliage tissue of the mother trees were collected from one population per species, in which two distinct chloroplast haplotypes at the trnL (UAA) 5′ exon–trnF (GAA) region were co-distributed. In total, the DNA sequences of the chloroplast fragments in 255 samples were determined, and the haplotypes of the germinated seedlings and the mother trees were compared. Among the 16 mother trees examined across all species, 12 trees were shown to have produced at least one offspring with a different haplotype from the mother, indicating the occurrence of paternal inheritance of chloroplast in the fertilization processes. In binomial GLMM analyses, the haplotype of mother trees in C. columellaris, C. gracilis, and C. verrucosa did not significantly affect those of their offspring, and the predicted frequency of seedlings’ haplotypes was compatible with the observed frequency in adult canopy trees. These findings provide a genetic support that paternal inheritance of chloroplast DNA via pollen dispersal would be dominant in the Callitris species.     

袋控缓释肥施用量对土壤有效养分含量和桃树生长结果的影响

试验以3年生桃树(瑞蟠17号和瑞蟠21号)为试材,研究了袋控缓释肥施用量对土壤有效养分含量及桃树生长结果的影响,结果表明:袋控缓释肥的施用量影响袋控缓释肥养分释放,试验前期(5~6月)每袋袋控缓释肥养分释放量随着肥料施用量的增大而降低,3袋/株处理比5袋/株和7袋/株处理释放量分别高13.95%和22.37%;试验中后期(7~9月)各处理养分释放量总体下降,8~9月份3袋/株处理均显著低于其他处理。土壤有效养分(无机氮、有效磷和速效钾)含量随施肥量增大而提高,0~40 cm土壤有效养分含量较高,受施肥量的影响明显,处理间差异更显著。对中熟蟠桃品种瑞蟠17号而言,在植株快速生长期,5袋/株处理新梢生长量最大,叶片叶绿素含量最高;果实产量和品质最高,果实产量分别比3袋/株、7袋/株和空白处理高22.2%、26.4%和48.4%;而对于晚熟蟠桃瑞蟠21号品种,7袋/株处理产量和品质最高,其产量分别比5袋/株、3袋/株和空白处理高18.5%、27.0%和37.7%。