THE UTILIZATION OF HETEROSIS IN THE BREEDING OF TOMATO | ||||
| Journal of Plant Production | ||||
| Article 16, Volume 32, Issue 3, March 2007, Page 2105-2114 PDF (447.44 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2007.206728 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Kawther K. Dawa1; I. M. El Ghareeb2; I. Abd El-Hay2 | ||||
| 1Fac. of Agric. Mansoura Univ, | ||||
| 2Hort. Res. Inst. | ||||
| Abstract | ||||
| After being self pollinated up to the ( S4 ) generation , two tomato cultivars , spread in Egyptian agriculture i,e Money Maker and Super Marmand were crossed with three imported hybrids i,e TY 70, Facolta 38 and G.S 12 . The parents and the F,, made including reciprocals were transplanted on the third of March ( 2004 ) at the Farm of El.Kassasin. Hort. Res. Station. Ismailia Governorate. A complete randomized block design with three replicates was used to performe the yeilding pofntial and some quality traits. The following results were recorded 1- The yield of TY 70 & Facolta 38 was extremely high and was found to be two times as high as the level of production in Super Marmand. Moreover, the behavior of number of flowers per plant recorded the same trend. Thus these hybrids might be imported for direct cultivation of high yielding tomato production inspite of their highest cost. 2- Total soluble solids and ascorbic acid traits showed insignificant differences for all the genotypes 3- The crosses made between the ( S4) of Money Maker & Super Marmand and the imported hybrids were superior with highly significances for number of flowers and total yield per plant. 4- The best combinations having more than 90 flowers per plant and the yield exceeded six kg per plant that were identified as the crosses involving Money Maker as a male or female parent. 5- An extremely high levels of heterosis for total yield reached in some instances , more than 50% above the better parent" the three imported hybrids ". This was attributed to the possible effect of some adaptability genes inherited by the F, hybrids from ihe cultivars spread and considered as local in Egyptian agriculture. Thus, seeds of the foreign hybrids could be imported in lesser quantities and can be utilized in the production of cheeper local hybrid seeds when crossed with Money Maker and Super Marmand. | ||||
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