Studies On Introduced Yugoslavia Maize Germplasms And Their Utilization

This paper studied the characteristics of the Yugoslavia maize germplasms and their direct and indirect utilization through the introduced 33 Yugoslavia hybrids, 9 inbred lines, 10 inbred lines from 5 elite Yugoslavia hybrids ,14 lines from 478×three introduced Yugoslavia inbred lines ,8 lines from Yugoslavia inbred lines ZP256×three Chinese inbred lines and their 211 testcrosses with Chinese elite inbred lines belonging to different heterotic groups .The result showed that:(l) The 33 Yugoslavia hybrids had little direct utilization value in Henan province, but the ear length of some hybrids had potential value in breeding;(2) The GCA,SCA of the 10 generation inbred lines were different significantly .The GCA of 801-2-1-1,805-1-1-1 was significantly positive and thus more elite crosses could be made with them. The per-plant yield of the 7 testcrosses 801-2-1-1 xGAI3,xYU374, 810-2-l-lxGAI3,xYU87 -l,805-l-3-lxS478,YU87-l,805-l-l-lxGAI3 was higher significantly than check by 6.31%-27.11%;(3) 9 Yugoslavia lines were divided into 5 heterotic groups .9809 was classified individually to Reid heterotic group definitely.lt had great genetic differences with other inbred lines, and had higher direct utilization value in breeding .The per-plant yield of 9809xS22,9809xCHANG7-2 was higher significantly than check by 41.56%,9.32% individually. The combining abilities of the other inbred lines and their heterosis were much complicated. Thus it was difficult to evaluate their germplasm relationships with Chinese inbred lines;(4) Yugoslavia inbred lines had higher indirect utilization value in breeding .In the 22 generation lines from 478×three introduced inbred lines and ZP256×three Chinese inbred lines, the GCAs of 5 lines wassignificantly positive and had great value in breeding. The per -plant yield of 21 crosses was higher significantly than check by 3.85%-33.28% in the 88 testcrosses.