不同收获期糯玉米杂交种的种子萌发和幼苗生长  

Seed Germination and Seedling Growth of Hybrid Waxy Corn in Different Harvesting Time

作　　者：卢柏山[1] 史亚兴[1] 徐丽[1] 樊艳丽[1] 律宝春 云晓敏 牛茜 

机构地区：[1]北京市农林科学院玉米研究中心,北京100097 [2]北京市种子管理站,北京100088

出　　处：《贵州农业科学》2015年第11期47-51,共5页Guizhou Agricultural Sciences

摘　　要：为确定新疆制种基地糯玉米种子的适宜收获期,给高活力糯玉米种子生产提供依据,选用糯玉米杂交种京科糯2000、京紫糯218,甜加糯类型玉米杂交种京科糯928为试验材料,研究新疆制种基地糯玉米杂交种种子成熟度对种子萌发及幼苗生长的影响,确定高活力种子的适宜收获期。结果表明：不同品种、授粉后不同收获期对种子发芽势、发芽率、活力指数、生长势、干物质积累、抗冷性等的影响均达到显著差异水平。在授粉后20-55d的不同收获期,3个品种种子各指标总体均呈先升高后降低的趋势,京科糯2000在授粉后40-50d收获、京科糯928在授粉后45d收获、京紫糯218在授粉后50d收获时,种子活力指标和生长指标值均达最大,抗冷性最强,为最适收获期;品种之间,最适收获期的发芽率为京科糯928（98.67%）〉京科糯2000（94%）〉京紫糯218（92.33%）,3个品种的抗冷性强弱表现为京科糯928〉京科糯2000〉京紫糯218。Effects of waxy corn Jingkenuo 2000,Jingzinuo 218 and Jingkenuo928（waxy and sweet）with different seed maturation degree on seed germination and seedling growth were studied,in order to determine the suitable harvesting time.The results showed that variety,harvesting time both had significant effects on seed germination potential,germination rate,vigour index,growth potential,amount of dry matter,and cold resistance.Generally all the index above showed increase firstly and then decreased in 20-55days after pollination（DAP）.Seed vigour index and growth index both reached a maximun level when harvested 40-50DAP for Jingkenuo 2000,45 DAP for Jingkenuo 928 and 50DAP for Jingzinuo 218,which were the suitable harvesing time.Relatively,germination rate of seeds on suitable harvesing time was Jingkenuo 928（98.67%）〉Jingkenuo 2000（94%）〉Jingzinuo 218（92.33%）.Cold resistance among three varieties showed Jingkenuo 928〉Jingkenuo 2000〉Jingzinuo 218.

关 键 词：糯玉米 种子成熟度 收获期 种子活力 幼苗生长 

分 类 号：S513[农业科学—作物学]