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苏南地区夏季耐热小白菜品种比较试验 总被引:1,自引:0,他引:1
为了丰富适宜在苏南地区夏季栽培的小白菜品种,我们筛选了13个小白菜品种开展夏季耐热品种比较试验,试验分3批在苏南地区夏季不同时期进行,以华王为对照。试验结果表明,除苏婧在生长势、束腰性、产量等性状方面表现不如华王(ck)外,其他品种均与华王(ck)相似,各参试品种均可在苏南地区夏季种植。 相似文献
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影响白菜游离小孢子培养关键因素分析 总被引:25,自引:0,他引:25
对影响白菜游离小孢子培养的关键因素进行分析研究。单因素研究结果表明: 54个基因型之间的小孢子胚诱导率差异显著; 对供体材料低温处理, 在0~5 d范围内小孢子胚诱导率差异不大, 超过5 d则明显降低; 高温诱导在12~60 h范围内差异不大, 超过此范围则小孢子胚诱导率明显降低; NLN培养基中添加生长素(NAA) 和细胞分裂素(6-BA) 对小孢子胚诱导率影响不大, 添加的浓度过大时小孢子胚诱导率反而降低; 活性炭的有无和浓度大小对小孢子胚诱导率影响极大。通过基因型、生长素、细胞分裂素、活性炭4因素分析表明: 基因型之间差异显著, 活性炭不同浓度之间差异显著; 基因型与活性炭不同浓度之间的互作差异显著; 其它的5个一级互作、4个二级互作和1个三级互作差异均不显著。 相似文献
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白菜S位点糖蛋白基因的克隆与表达分析 总被引:1,自引:0,他引:1
以白菜自交不亲和系为材料,采用RT-PCR技术,用特异引物对SLG基因进行克隆,获得SLG基因cDNA序列长度为1 324 bp,命名为BcSLG。序列分析表明:所获得的白菜BcSLG基因cDNA序列包含一完整的编码框,编码432个氨基酸,含有12个保守的半胱氨酸残基和7个N-糖基化位点。序列比对和系统进化分析表明:BcSLG与其它植物的SLG基因氨基酸序列具有较高的同源性,与大白菜和甘蓝亲缘关系最近。荧光定量PCR分析表明:BcSLG基因在自交不亲和系的柱头中表达量最高,其次是花蕾,叶片中表达最低, 在自交亲和系的柱头、花蕾和叶片中相对表达较低。 相似文献
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The pollen development-related gene msLTP from Brassica campestris ssp. chinensis belongs to the lipid transfer protein (LTP) gene family. The promoter of the msLTP gene was isolated by thermal asymmetric interlaced PCR (TAIL-PCR). The functional elements of the promoter (named Bc15) were analysed. Some anther/pollen-specific elements, such as the GGTT box and the GTGA box, were identified in the sequence. In an attempt to confirm the promoter activity, a series of 5′-truncated constructs was fused with the GUS reporter gene to functionally analyse the key regulatory regions of the promoter. Transient expression analysis showed high GUS activity in onion epidermal cells containing the region from ?731 to ?1 bp. The truncated construct bearing the ?731 to ?1 bp fragment was stably introduced into Arabidopsis. Histochemical analysis of the transgenic plants showed distinct and specific GUS expression at different stages of anther/pollen development. Transverse sections of flower buds further indicated that the Bc15 promoter activates reporter gene expression in the anther specifically. These findings elucidated the molecular mechanisms of LTP gene regulation during pollen development, and suggested a potential application of the Bc15 promoter in engineering male sterility for hybrid production. 相似文献
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从红菜薹的品种资源、遗传育种、良种繁育以及栽培生理、贮藏保鲜、品质安全等方面,综述了近20年来我国红菜薹研究的主要成果,可供今后我国红菜薹教学、科研和生产及宏观决策的参考. 相似文献