1Department of Vegetable Science, Horticultural College & Research Institute, Dr. Y.S.R. Horticultural University, Krishi vigyan Kendra, Venkataramannagudem, Andhra Pradesh-534101, India
2Department of Plant Pathology, Krishi vigyan Kendra, Kendrapara-754211
3Department of Soil Science, Krishi vigyan Kendra, Orissa University of Agriculture and Technology, Malkanagir, Bhubaneswar, Odisha, 751003
*email: prarthanalucky@gmail.com
Online published on 9 December, 2016.
A field experiment was conducted using 30 sweet potato genotypes to study the relationship between yield and yield attributing characters. The genotypes were characterized based on response for 11 quantitative and 7 qualitative characters Correlation and path coefficient analyses were carried out for 18 characters of yield and its components. Character association indicated that tuber yield per hectare was positively and significantly associated with number of tubers per plant, tuber yield per plant and â-carotene content at phenotypic and genotypic correlation levels and tuber yield per plant had positively and significantly associated with vine length, vine internodal length, leaf area and tuber girth at both phenotypic and genotypic levels. Path analysis indicated that number of branches per plant, root length, root yield per plant and starch had direct effect on tuber yield per hectare; the remaining characters had negligible to low and moderate indirect effects through other component characters. Number of tubers per plant, tuber yield per plant and â-carotene content are reliable characters to use for improvement of sweet potato.
Ipomoea batatas, Correlation studies, Direct effects, Tuber yield, Indirect effects
