GENETIC VARIABILITY AND ISOLATION, CHARACTERIZATION OF RESISTANT GENE ANALOGS IN TOMATO LEAF CURL NEW DELHI VIRUS (ToLCNDV) RESISTANT ADVANCED INBRED LINES OF RIDGE GOURD (Luffa acutangula (L.) Roxb.)
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Date
2016-07
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University of Horticultural Sciences, Bagalkot (COLLEGE OF HORTICULTURE,GKVK POST, BENGALURU)
Abstract
The present investigation was undertaken during the year 2015-2016 at ICAR-IIHR, Bengaluru. Fourteen advanced inbred lines of ridge gourd were evaluated and significant differences were observed among advanced inbred lines for the characters studied viz., Node number & days taken for first female flower appearance, Days taken for first male flower appearance, vine length, leaf length, fruit length girth & weight, ovary length, peduncle length, number of fruits per vine, yield/vine, fruit yield(t/ha). High PCV and GCV was observed for fruit length, number of fruits per vine, fruit yield per vine and fruit yield/hectare indicating that maximum amount of variability present among the inbred lines for these characters and offers good scope for improvement by simple selection. High heritability coupled with high genetic advance over per cent of mean was observed for the characters fruit length, ovary length, peduncle length, number of fruits per vine, fruit weight, yield per vine, fruit yield per hectare indicating that these characters were governed by additive gene action and offers good scope for improvement by simple selection through these characters. Identification of conserved domains among the LaRGAs revealed that the five conserved motifs were conserved within the TIR - NBS - LRR viz., Kinase - 2, RNBS - A, RNBS - B, P - Loop and Hyper GLPL. Phylogenetic analysis of LaRGAs concluded that the RGAs isolated in this study belong to the TIR-NBS- LRR class of gene family.