DEVELOPMENT OF  NEW  MAIZE INBRED  LINES

T. Mobarak, Muhammed; A.Suhel, Muwafak; H. Kathem, Muhammed; Y. Baktash, Fadel

	DEVELOPMENT OF NEW MAIZE INBRED LINES
The Iraqi Journal of Agricultural Science
Article 1, Volume 39, Issue 4, 2008, Pages 105-112
Authors
Muhammed T. Mobarak; Muwafak A.Suhel; Muhammed H. Kathem; Fadel Y. Baktash
Abstract
An experiment was conducted in spring and fall seasons during 2004-2007. The objective was to develop new inbred lines of maize (Zea mays L.), by using different genotypes ( Buh 106 , Talar , single cross hybrid shahed and Yu-Zp Sc704 , by hand selfing method . After three generations of selfing, 95 lines (S3) were produced . Top crosses developed by using the lines as female parents and synthetic variety 5012 as pollen parent . The field trails for top crosses was carried out by using randomized complete block design with three replications , at the same time selfing was continues , end of fall season 2007 inbred lines in seventh generation (S7) were produced . Significant differences were found among top crosses in studied characters except number of ears /plant. Plants of top cross BK102 was earlier than the others in number of days from planting to 75% tasseling and silking (55 and 56 days) . Plants of the crosses BK110 were superior in plants height (179cm). Plants of the cross BK143 and BK128 superior in number of grains/ear (304 and 300 grains/ear . The higher 300 grain weight (105 gms) produced from plants of BK104 , BK110 , BK127 and BK129. Plants of the top cross BK128 and BK164 produced higher grain yield 103 and 101 gms/plant , this revealed that both top crosses has higher general combining ability . We are recommended to use the new inbred lines BK104 , BK105 . BK110 , BK115 , BK121 , BK127 , BK128 , BK129 , BK147 , BK164 in adaillel crosses to produce promise single cross hybrids in Central Iraq .

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