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搜集和整理2001~2012年国审普通玉米杂交种及其双亲自交系的来源,分析并绘制亲本自交系的系谱图,根据亲本自交系所属的杂种优势群,分析杂种优势模式的类型与比例。结果表明,属于塘四平头群的亲本自交系主要是黄早四的衍生系,骨干黄改系吉853、LX9801与昌7-2仍然被广泛应用,并且产生多个衍生系被大量应用;旅大红骨群的亲本自交系主要是丹340及其衍生系,其中自交系丹598的多个衍生系成为国审玉米杂交种的亲本自交系;Reid群的亲本自交系数量最大,478衍生系数量达30多个,7922衍生系数量达20多个,5003的衍生系数量为10个以上;PB群的亲本自交系是78599直接选系及其衍生系,其中齐319已产生多个衍生系;Lancaster群的亲本自交系主要是Mo17的改良系。杂种优势模式类型中Reid×塘四平头杂交种所占的比例最大。
Collecting and organizing the sources of national corn hybrids and their parents from 2001 to 2012, analyzing and mapping the pedigree of their own inbred lines, and analyzing the types of heterosis patterns based on the heterotic groups of the parent inbred lines And the ratio. The results showed that the parent inbred lines belonging to Tongsipingtang were mainly derived from Huangzao 4, the backbone of yellow line was changed to Ji 853, LX9801 and Chang 7-2 were still widely used, and many derived lines were widely used. The main inbred lines of Ludahong bone group were Dan 340 and its derivative lines, of which the multiple inbred lines Dan 598 became the parent inbred lines of the national corn hybrids. The largest number of inbred lines was found in the Reid group , 478 derived more than 30, 7922 derived more than 20, and 5003 derived more than 10; PB inbreds were 78599 direct lines and their derived lines, of which Qi 319 had Resulting in a number of derived lines; Lancaster population of the parent inbred lines mainly Mo17 improved lines. Heterodophy patterns of type Reid × Tong Siping hybrids accounted for the largest proportion.