Evaluation of yield potential, genetic variances and correlation for nine cultivars of alfalfa under the New Valley environment
2008
Abdel-Galil, M.M., ARC, Giza (Egypt). Field Crops Research Institute, Forage Crops Research Department | Hamed, N.M., ARC, Giza (Egypt). Field Crops Research Institute, Forage Crops Research Department
In the period of 2004-2006, a field trail was conducted at the New Valley Res. Station to evaluate the yield potential and genetic variances among alfalfa cultivars; a new Synthetic (Wady Syn.), four promising populations (Serw1, Serw2,Nitrogen fixation and Salt tolerant), three commercial varieties (Siwa, Ismailia1 and Ismailia94) and a local cultivar (Wady). Twenty cuts were obtained during 2005 and 2006. the combined analysis of variance over two years indicated that Wady Syn. population ranked first for fresh and dry yields (72.3t/fed and 18.9 t/fed) and other studied traits were significantly different from other tested cultivars. The commercial variety Ismailia94, ranked second (66.55 and 17.2t/fed). Regarding to plant height, tillers and leaf to stem ratio (LSR), Wady Syn. recorded the highest values (48.2 cm, 416.7/square meter and 47.6%) significant from Ismailia94 which recorded 45.6 cm, 362.3/square meter and 43.4% respectively. Significant positive correlation among either fresh forage yield or dry forage yield and other traits were found. The values of genotypic coefficient of variation for fresh and dry forage yields revealed relative variations among the tested cultivars which were less influenced by environment. The environmental variation ranged from 4.4% to 33.3% and the genetic advance ranged from 3.9% to 14.5%.
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