Estimating several of Genetic Parameters for the Interaetion of Resistant Genes and Root Knot Nematode Meloidogyne javanica in Indetermeniate Tomato Hybrids

Abstract

This Study was conducted by choosing four different purelines according to sensitivity and resistance from tomato plant for root knot Nematode Meloidogyne caused by Meloidogyne javanica the(SH-I-7/B , SH-14 A , SH-Sel- 19cat , SH-inb-6) . Six full-dialed and 6 recipracol have been resulted from different crosses scheme. All genotypes (purelines and hybrids) which contained 16 genotypes have been tested for sensitivity and resistance to root knot disease.The pureline SH-I-7/B and SH-14 A have shown less sensitivity than commercial variety (super merimande), while the SH-Sel- 19 cat and SH-inb-6 purelines have showed more resistance for the same disease, even after 60 days of contaminating their roots by (J2) with 5000 mature .Kg soil ‘ no root knots were formed. The action of resistance genes for this disease was controlled by adding gene action and dominant genes' impact seem to be equally. All known genes which expressed resistance for this disease are high likely to be quantitative genes which means more than one gene could control this trait for this disease.