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抗虫杂交棉新品种鲁棉研1 5集高产、优质、抗虫、抗病、适应性强于一体,2 0 0 1年5月通过山东省农作物品种审定委员会审定,2 0 0 3年2月通过河南省认定。为了确保制种质量,针对鲁棉研1 5父、母本的特性,结合大面积制种实践,从全程质量控制角度,对大规模人工杂交制种的技术规程及组织等加以阐述。1制种田的选择土层深厚,土质肥沃且均匀,地势平坦,排灌水条件良好,成方连片,交通便利,中间不能与其它棉田插花种植,无黄、枯萎病或轻病。如连续多年制种时,应每隔几年换一次茬。2播种2 .1播前准备与亲本配置。制种田一般采用营养钵育苗移栽。播前精… 相似文献
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Evaluation of the Low-Temperature Tolerance of Cotton Varieties in the Huang-Huai Region during Seed Germination 总被引:1,自引:0,他引:1
[Objective] To provide a theoretical foundation and germplasm resources for low-temperature-germination cotton breeding, the germination characteristics of 38 cotton varieties novel to or formerly widely planted in the Huang-Huai Region were evaluated under different low temperature stress conditions. [Method] Analysis of variance, the fuzzy membership function method, and cluster analysis were used to comprehensively evaluate the tolerance of these varieties to low temperature stress. [Result] As the temperature was lowered, germination rate, germination index, and vigor index exhibited a decreasing trend in all cotton varieties, but resistance to low temperature was significantly different among varieties. Cluster analysis divided the 38 varieties into three categories: highly resistant, resistant, and non-resistant. [Conclusion] Early-introduced varieties and those bred from early-introduced germplasm resources had weaker resistance to low temperature stress, with Stoneville and Deltapine series showing the lowest tolerance. The new transgenic insect-resistant cotton varieties SCRC 37 and SCRC 36 had the strongest resistance to low temperature stress. 相似文献
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不同生态区抗虫杂交棉稀植留叶枝效应研究 总被引:3,自引:0,他引:3
以江苏大丰和山东惠民为试点,研究了不同生态条件下抗虫杂交棉去、留叶枝处理及其与密度的互作效应。结果表明:在一定密度范围内,留叶枝处理对株高有一定的抑制作用,而对果枝数没有明显影响,不同密度处理对单株叶枝数影响不大,但随着密度的增加,有效叶枝数减少;除大丰试点最高密度处理外,不同密度下留叶枝处理的皮棉产量均高于去叶枝处理,大丰和惠民两试点分别平均增产5.41%和12.90%;大丰试点以1.8万株/hm2留叶枝处理组合最优,其次为2.4万株/hm2留叶枝处理组合,惠民试点则以3.75万株/hm2留叶枝处理组合产量最高,其次为4.2万株/hm2留叶枝处理组合。研究结果进一步表明,结合稀植简化整枝栽培技术推广杂交棉,是实现杂交棉高产高效的重要手段。 相似文献
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