不同类型糯玉米自交系花丝活力比较  

Comparative Study on Filament Vitality of Different Types of Waxy Maize Inbred Lines

作　　者：陈坚剑[1] 吕桂华[1] 徐秀红[1] 郭国锦[1] 

机构地区：[1]浙江省东阳玉米研究所,浙江东阳322100

出　　处：《江西农业学报》2014年第2期10-12,22,共4页Acta Agriculturae Jiangxi

基　　金：浙江省公益性面上项目(2011C22017);浙江省重大科技专项农业项目"玉米新品种选育"(2012C12902-4)

摘　　要：选用不同类型的5个糯玉米自交系,测定了其花丝伸长速度、花丝抽出苞叶数目以及吐丝后不同时期授粉结实数,结果表明:无秃尖类型自交系花丝伸长速度较一致,花丝抽出苞叶的时间较早、集中,花丝伸长1 cm后的第3天,花丝就全部抽出苞叶;第2天授粉结实数就显著增加,第3天授粉结实数接近于最大值;第5天、第6天后结实数开始显著下降。有秃尖、长穗型自交系的花丝伸长速度在试验的6 d中缓慢提高,抽出苞叶的花丝数目较少,持续时间长,前7 d的结实数缓慢升高,后逐渐降低。因此,在糯玉米组合选配时,选择少秃尖自交系作母本,制种时尽可能使父本盛花期在母本吐丝后的第3天至第5天,从而提高制种产量。In this study , five different types of waxy maize inbred lines were selected and used , and their filament elongation speed, number of filaments drawing out from bracts , and number of pollinated seed setting in different periods after silking were de-termined.The results showed that：for inbred lines without bald tip , their filament elongation speed was relatively uniform , and the time when their filaments drew out from their bracts was earlier and more intensive;the filaments completely drew out from bracts on the third day after filaments elongated by 1 cm;the number of pollinated seed setting increased obviously on the second day after sil -king, and was close to the maximum on the third day after silking , but it began to decrease markedly during 56 days after silking. For inbred lines with bald tips and long ears , their filament elongation speed increased slowly in 6 days’ experiment;the number of filaments drawing out from bracts was less , and they drew out for a longer time;the number of pollinated seed setting increased slow-ly during 07 days after silking, and then declined gradually .Thus, in the breeding and selecting of waxy maize combinations , the inbred lines with little bald tips should be selected as female parent;in the high-yielding seed production of waxy maize combina-tions, we should as much as possible make the full -bloom stage of male parent be on the 3rd-5th day after the silking of female parent.

关 键 词：花丝活力 伸长速度 花丝数目 结实数 

分 类 号：S513[农业科学—作物学]