山东省主要玉米杂交种种质基础评述

A REVIEW ON THE GERMPLASM BASE OF THE MAIN MAIZE HYBRIDS IN SHANDONG PROVINCE

对 198 5年～ 1999年山东省主要玉米杂交种和自交系遗传组成进行了综合分析。山东省的玉米杂交种和亲本自交系的利用趋向集中 ,其中鲁玉 2号、丹玉 13号、掖单 13号、烟单 14号、掖单 4号、掖单 12号、沈单 7号等 7个杂交种利用占 6 7.32 % ,黄早 4、M0 17、10 7、4 78、E2 8、340、8112等 7个自交系利用占 72 .0 4 %。亲本自交系的来源也趋向集中 ,主要是塘四平头系统、Reid系统 ,玉米种质基础狭窄。

The utilization of maize hybrids and genetical component of inbred lines in shandong province is summarized through the synthetics analysis of main maize hybrids grown on more than 6.7 ×10 4 hm 2 from 1985 to 1999.The utilization of main maize hybrids and inbred lines is tending to concentration. 7 hybrids were wildely used,making 67.32% of total hectarage in Shandong Province, 7 inbred lines were used as parents of hybrids for 72.04%.The genetic source of inbred lines development is also tending to concentration.Tangsipingtou group and Reid group were widely used.The maize germplasm base of Shandong province trends to narrow.The selection of new hybrids and germplasm improvement were also discussed in this paper.