قوة الهجين وقابلية الائتلاف للحاصل و مكوناته في الهجن الثلاثيه للطماطة

الملخص EN

Tow field experiments were carried out in 2006 and 2007 on tomato (Lycopersicon Esculentum Mill) at vegetable field, Horticulture Department,Agriculture College,University of Baghdad.

The seeds planted in 2006 for the production three way hybrid seeds to study some genetics parameters using (Linextester)used to produce three way hybrids.

The field performance of 55 tomato hybrids produced according to line x tester genetic design evaluated together with their parents in a randomized block design with three replicates at the same field in 2007 .

The objective was to evaluate hybrids vigour , gene action and combining ability of different traits .The resultes reveald that the best parents were castel rock(V1)and super lux(H7) They are showed best heterosis for number of fruits per plant 42.3% and yield per plant 82.94% for hybrid(H7XV1) .

The heterosis for fruit wight was 36.76% for hybred(H5x V5).

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The results were showed the broad scene heritability for all traits was very highly Narrow scene heritability for all traits was very low.

The average degree of dominance was higher than one for number of fruit per plant and yield per plant indicating that the non additive gene action plays a greater role in the inheritance of their traits .