Line x tester analysis in crosses Sudanese and exotic lines of forage sorghum \{sorghum bicolor (L.) moench\}
2010
Mohammed, M.I., Agricultural Research Corporation, Shambat Research Station, Khartoum (Sudan)
Combining ability in forage sorghum (Sorghum bicolor (L.) Moench) was not as much investigated as in grain sorghum. In the present study, 4 local stocks Testers) and 7 exotic stocks in A3 cytoplasm were crossed in line x tester fashion to investigate combining ability in forage sorghum. The hybrids and their parents were tested across two years (2002-2003) and at two locations in Khartoum State. Forage yield, days to flowering, plant height, leaf to stem ratio and stem diameter were studied. Significant general (GCA) and specific (SCA) effects in desirable direction were detected for most traits. The best general combiners for forage yield and earliness in flowering were identified. Both additive and non-additive gene actions were important in the expression of all characters with the preponderance of additive actions for days to flowering, forage yield, stem diameter, leaf to stem ratio and non-additive actions for plant height. GCA effects were more stable over years than specific ones. Selection in early generations was suggested for characters predominately controlled by additive genes. Heterosis breeding was recommended for forage yield improvement. For leaf to stem ratio, selection must be based on more genetically diverse materials
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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