Vol. 10, Issue 1 (2021)

Author(s):
Naresh Kumar, Amrita Nigam and Akshay Kumar Pathak

Abstract:
The purpose of this research was to investigate the genetic variability, heritability, genotypic coefficient of variation (GCV), phenotypic coefficient of variation (PCV) and genetic advance among 15 genotypes of carrot in terms of quantitative, qualitative and nutritional important characters for the effective selection of genotypes. So, a total of fifteen carrot genotypes were studied based on nineteen quantitative, qualitative and nutritional characters at North Eastern part of Rajasthan during the 2018 and 2019 cropping season respectively. Investigation were carried out in randomized block design (RBD) in two different seasons i.e., environment 1 (E 1) and environment 2 (E 2) with the objectives to assess the magnitude of genetic variability, heritability and genetic advance of fifteen genotypes of carrot (Daucus carota L) among 19 characters. Based on the performance and variance the genotypes, selection M E 01 was found to be the best with respect to growth, yield, quality and nutritional attributes followed by Shin Kuroda, Selection Red and Pearl Red for both the season respectively. The highly significance difference among all the characters viz. inner core diameter (cm), flesh thickness (cm), plant height (cm) at 60 DAS, plant height (cm) at 90 DAS, harvest index (%), gross root weight / 5 plants (kg), net root weight / 5 plants (kg), dry matter (%), TSS (o brix %), β carotene content (mg / 100 g fresh wt.) and vitamin A (I U) except days to seed germination, number of leaves / plants and moisture % in roots for both the season (E 1 and E 2), were observed sufficient amount of genetic variability. The highest pooled genotypic co-efficient of variation was found in flesh thickness (24.18 cm), followed by net root wt. / five plants (21.85 kg), vitamin A (19.62 I U), β carotene content (19.61 mg / 100 g fresh wt.), yield qt / hectare (18.42) and harvest index (17.11 kg). The maximum estimate of heritability (h²) was observed in inner core diameter (97.74 cm) for environment 2 (E 2), followed by vitamin A (96.22 IU) and β carotene content (95.37 mg / 100 g fresh wt.) in environment 1 (E 1). The correlation study revealed that majority of the characters were positively correlated with each other. The highest total sugar (0.64* %) over the genotypic environment was found positively and significantly at 5 % with gross root weight / 5 plant (kg). TSS (1.00** 0brix %) was found maximum significantly at 1 % correlated with root girth (cm) over the genotypic environments. Similarly, total sugar (0.64* %) was found positively significant at 5 % correlated with TSS (0brix %) and vitamin A (0.96** I U) was recorded positively significant at 1 % correlated with β carotene (mg / 100 g fresh weight) over the phenotypic environments.