Genetic Variability Analysis in Local Germplasm of Ivy Gourd (Coccinia grandis L.) in Southern Rajasthan Conditions

Abstract

An experiment was carried out on study of genetic variability in 30 genotypes of ivy gourd at Horticulture Department of Rajasthan College of Agriculture, MPUAT, Udaipur during July to September 2017. Twelve Growth and quality characters were studied. The analysis of variance indicated that the mean sum of square due to genotypes were highly significant for all the characters suggesting the presence of good deal of variability in material studied. High magnitude of genotypic as well as phenotypic coefficient of variations were recorded for traits viz., petiole length (27.63% and 29.93%), inter nodal length (22.73% and 23.40%), leaf width (22.63% and 23.35%) and leaf width (22.52% and 23.56%) and highest heritability recorded for inter nodal length (94.30%) followed by leaf length (93.92%), leaf width (91.37%), ascorbic acid (89.48 %), petiole length (85.17%), fruit weight (82.10%), fruit length (79.98%) and chlorophyll content in leaves (78.23%).The highest genetic gain was recorded for petiole length (52.52%) followed by viz., inter nodal length (45.47%), leaf length (45.17%), leaf width (44.34%), fruit weight (34.21%), fruit length (28.24%) fruit diameter (23.31%) & genetic advance were also higher for some characters. Availability of high GCV & PCV shows presence of sufficient genetic variability for evaluated traits. This indicates that there is an ample scope of selection in the present gene pool for yield and its components.

Genetic diversity, morphological traits, quality traits and antioxidants potentiality of Coccinia grandis germplasm under rainfed semi-arid region

“…The maximum mean leaf length and width exhibited in CHESIG-11 (9.10 and 8.20 cm). These findings are in line with 11 , 28 – 30 who also found significant differences in morphological traits of ivy gourd germplasm. The number of female flowers per plant is an important yield-contributing trait, range from 738 (CHESIG-20) to 1684 (CHESIG-6).…”

“…Whereas, fruit yield per plant showed phenotypic negative correlation with PL (− 0.0192), Ac (− 0.0975), DPPHL (− 0.1968), FRAPL (− 0.0975) and (0.0053). Similar findings were reported by 4 , 5 , 8 , 11 , 13 , 30 , 38 . In genotypic level (Table 6 ), fruit yield per plant showed significant positive correlation with VL (0.6833), IL (0.2991), NFFP (0.8107), FD (0.5245), AFW (0.6766), NFPY (0.7659), ASC (0.4611), TSS (0.5004), TPF(0.4281).Whereas, fruit yield per plant showed genotypic negative correlation with DPPHL (-0.2084).…”

“…PCV is slightly higher than GCV for most of traits under study, indicating less environmental influence. Similar results were given in ivy gourd 4 , 11 , 29 , 30 . Moderate PCV and GCV were recorded for the characters like IL (15.08 and 14.75), TPL (18.33 and 17.47), TFL (19.68 and 18.89), CUPRACL (18.53 and 18.31), CUPRACF (21.08 and 20.92), TFF (18.28 and 18.06), DPPHF (12.27 and 11.62).…”

“…These genotypes can be used in cocinia breeding programmes to develop cultivars with desired traits. Significant variation of fruit characters was also reported in ivy gourd 4 , 11 , 28 – 30 and in cucumber 27 , 32 .…”

“…The dominance of selection for any trait depends not only on the amount of phenotypic and genotypic variability but also on estimates of broad sense heritability. High heritability in capacious sense is effective in elucidating desirable trait for selection and enables the breeder to select superior genotypes on the basis of phenotypic expression of quantitative traits 4 , 13 , 30 , 35 . In the present investigation, high heritability was recorded for all traits.…”