烟草重组自交系LM2和HM1花芽分化对低温敏感的差异性 |
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引用本文: | 叶雅婧,曹建,姬广新,邹刘秀林,古乾佑,罗健,李九彬,林艳华,张建奎. 烟草重组自交系LM2和HM1花芽分化对低温敏感的差异性[J]. 中国农学通报, 2018, 34(15): 44-47. DOI: 10.11924/j.issn.1000-6850.casb18010069 |
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作者姓名: | 叶雅婧 曹建 姬广新 邹刘秀林 古乾佑 罗健 李九彬 林艳华 张建奎 |
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作者单位: | 西南大学附属中学,西南大学农学与生物科技学院,西南大学农学与生物科技学院,西南大学附属中学,西南大学附属中学,西南大学附属中学,西南大学附属中学,西南大学附属中学,西南大学农学与生物科技学院 |
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基金项目: | 重庆市烟草公司重点项目“适宜武陵山区和秦巴山区的烤烟新品种选育”(NY20140401070015)。 |
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摘 要: | 【目的】花芽分化是植物生长发育进程的重要转折点,烟草作为模式植物,鉴定筛选花芽分化对低温敏感性不同的遗传资源,对研究植物花芽分化具有重要意义。同时烟草又是重要的经济作物,花芽分化与烟叶的产质量密切相关,鉴定筛选花芽分化对低温不敏感的材料,对提高烟叶产质量具有重要意义。本文对云烟97×贵烟1号F6代中选出的两个重组自交系LM2和HM1花芽分化的对低温的敏感性进行鉴定,旨在筛选特异种质资源。【方法】对LM2和HM1进行苗期低温处理,通过体视显微镜对其茎尖分化动态进行观察。【结果】结果表明,LM2在苗期低温处理下花芽分化进程与常温对照进程一致,苗期低温对LM2的花芽分化进程无影响,表明LM2是一个难得的对苗期低温钝感的材料;而HM1的茎尖花芽分化进程在苗期低温处理下较常温对照提前,表明HM2是对苗期低温敏感的材料,易受苗期低温影响。【结论】LM2和HM1是一对对苗期低温敏感性存在显著差异的特异种质资源,可用于研究花芽分化响应苗期低温的机制、选育抗低温早花烟草品种。
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关 键 词: | 重金属污染 重金属污染 土壤 原位钝化 评价方法 |
收稿时间: | 2018-01-12 |
修稿时间: | 2018-05-11 |
Sensitive Disparity Between Tobacco Recombinant Inbred Line LM2 and HM1 in Flower Bud Differentiation Under Low Temperature |
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Abstract: | This research aims to select and identify tobacco germplasms which have different sensitivities to low temperature in flower bud differentiation. Tobacco recombinant inbred lines LM2 and HM1 are used as materials, and their seedlings are treated under low temperature and room temperature, and then transplanted into field. The growth of meristem is observed dynamically under the stereomicroscope. The results showed that the flower bud differentiation process of LM2 under low temperature treatment was similar to that in the room temperature. The low temperature treatment for LM2 at seedling stage had no effect on the flower bud differentiation process. The floral primordium of LM2 was formed after transplanted into field for 30 days, began differentiating after 35 days, and the small flower primordia were developed after 40 days. However, the flower bud differentiation process of HM1 under low temperature treatment was different from that of the room temperature. Under low temperature treatment, HM1 entered the initiation stage of flower bud differentiation after transplanted for 25 days, got in the inflorescence primordium formation stage in the 35th day, and entered the flower organ development stage in the 40th day. It indicated that the HM1 and LM2 lines were a couple of special germplasm which had differences in low temperature sensitivity, they could be used to analyze the mechanism of flower bud differentiation in responding to low temperature at seedling stage, and breed tobaccovariety flowering early and resistant to low temperature. |
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Keywords: | tobacco recombinant inbred line low temperature at seedling stage flower bud differentiation sensitive disparity |
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