共查询到10条相似文献,搜索用时 15 毫秒
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植物染色体工程可以概括为染色体的减(削减),加(添加),换(代换),易(易位)和变(突变)。突变(Mutation)指基因的变化不包括可见的染色体的变化。减、加是在数目水平上,易、换是在结构水平上染色体的变化。在农业上主要应用于创造新作物种质资源和改良作物品种,现已取得明显的经济效果。 相似文献
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欧宾 《西南大学学报(自然科学版)》1989,(4)
植物染色体工程研究是创造植物新类型、改良植物品种种质的一条有效途径。近年来,我国在其基础研究和应用研究上都取得了一定成绩:1.蓝粒单体小麦等非整倍体系统的建立为染色体工程开阔了新途径;2.“小偃麦”等新品种或新品系在生产或育种上得到广泛 相似文献
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Abid Hussain Khoso Ghulam Mustafa Laghari Aziz Ahmed Laghari Ali Muhammad Bozdar Asif Ali Kaleri Nasir Ali 《东北农业大学学报(英文版)》2017,24(1)
Convolvulus arvensis is a toxic allelopathic weed that suppresses germination and growth of crops.The prime object of present study was to investigate effect of Convolvulus arvensis water extract on germination and performance of okra with different seed sizes.The seeds of okra variety pusa green were separated into three different sizes,viz large size(4.00-5.00 mm),medium size(3.00-3.50 mm)and small size(2.00-3.50 mm),and then soaked in allelopathic plant bindweed water extract and kept in patrisdishes for germination into the germinator at 15℃.The experiment was laid out using Complete Randomized Design(CRD)with three replications.The results showed that after sowing of 12 days the highest germination was observed in non-treated seeds as compared to seeds treated in Convolvulus arvensis water extract for 1 h,further non-treated large seeds produced maximum plants as compared to treated small seeds after sowing of 24 days.Meanwhile,root length,shoot length,root fresh and dry weight,shoot fresh and dry weight were recorded higher in non-treated large seeds as compared to small seeds soaked for 1 h in Convolvulus arvensis allelopthic water extract.It could be found that Convolvulus arvensis affected germination,seed growth and overall performance of okra,further presence Convolvulus arvensis in crops could cause negative impact on germination and integrity of okra crops. 相似文献
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《农业工程技术:农产品加工》2009,(1)
世界上首部植物基因组染色体图谱日前由中国科学家编撰完成。这部书收录了1978年~2008年我国各地近4000种经济植物的基因组染色体资料,其中珍贵野生物种年龄超过5000岁。这部名为《中国主要经济植物基因组染色体图谱》的图书共5册,分别绘制了我国果树及其野生近缘植物、农作物及其野生近缘植物、园林花卉植物、竹类、药用植物的染色体图谱。图谱由科学出版社出版, 相似文献
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探究体积较小且数目众多的植物染色体制片方法,摸索一套适合这类植物的制片方法,为这一类植物的染色体鉴定提供资料。 相似文献