tailieunhanh - Inheritance of grain yield in a half diallel maize population

Inheritance of grain yield, heterosis and combining ability were investigated in maize populations obtained from half-diallel crossing among 9 inbred parental lines. General and specific combining ability effects were significantly different among parental lines. | Turk J Agric For 28 (2004) 239-244 © TÜB‹TAK Inheritance of Grain Yield in a Half-Diallel Maize Population Ayd›n ÜNAY*, Hüseyin BASAL, Cahit KONAK Adnan Menderes University, Agricultural Faculty, Field Crops Dept., Ayd›n - TURKEY Received: Abstract: Inheritance of grain yield, heterosis and combining ability were investigated in maize populations obtained from half-diallel crossing among 9 inbred parental lines. General and specific combining ability effects were significantly different among parental lines. The grain yield was under the dominance gene effect. The parents W 552 and DNB were considered suitable according to their yield capacities and general combining ability effects. The midparent heterosis values ranged from ( x DNB) to (ALKD 222 x A 632) whereas the useful heterosis values varied between – (A 619 x A 632) and (N 7A x ALKD 90-1), and only 9 crosses had higher grain yields than that of the check variety. Of these crosses, N 7A x ALKD 90-1, N 7A x DNB and N 7A x IDRN Cornell, were considered promising hybrids. Key Words: Maize, diallel analysis, combining ability, heterotic effect Yar›m Diallel M›s›r Populasyonunda Tane Veriminin Kal›t›m› Özet: Dokuz kendilenmifl m›s›r hatt› ve bunlar›n yar›m diallel melezlenmesi sonucu oluflturulan populasyonda dane verimine iliflkin kal›t›m parametreleri, heterosis ve uyuflma yetenekleri incelenmifltir. Genel ve özel uyuflma yetene¤i etkileri yönünden genotipler aras›ndaki farkl›l›¤›n istatistiki olarak önemli oldu¤u saptanm›flt›r. M›s›rda dane veriminin dominant genlerin etkisi alt›nda oldu¤u bulunmufltur. Verim ortalamas› ve genel uyuflma yetene¤i etkileri dikkate al›nd›¤›nda; W 552ve DNB hatlar›n›n melez m›s›r ›slah› için uygun anaçlar oldu¤u belirlenmifltir. Heterosis de¤erlerinin % ( x DNB) ve % (ALKD 222 x A 632) aras›nda de¤iflti¤i, buna karfl›n kullan›labilir heterosisin % – (A 619 x A 632), ve % (N 7A x ALKD 90-1) aras›nda de¤iflti¤i