SCREENING OF GENOTYPES AND F2 SEGREGATING POPULATION OF CHINA ASTER (Callistephus chinensis [L.] Nees.) FOR ALTERNARIA LEAF SPOT
Loading...
Date
2016-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
K.R.C. COLLEGE OF HORTICULTURE COLLEGE OF ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
An investigation was carried out on “Screening of genotypes and F2 segregating population of China aster (Callistephus chinensis [L.] Nees.) for alternaria leaf spot.” during 2015-2016 at Department of Floriculture and Landscape Architecture, Kittur Rani Channamma College of Horticulture, Arabhavi.
Sixteen genotypes were used in this experiment. Each genotype replicated three times. Among sixteen genotypes screened, cv. AAC-1 recorded resistant disease reaction under the both natural disease pressure and artificial inoculated conditions (12.53% and 14.23%). Two genotypes PG Pink (20.87% and 23.73%) and AAC-5 (23.41% and 24.60%) recorded moderately resistant reaction in both conditions. However, cv. Arka Poornima shown high susceptible reaction with the highest PDI (76.60% and 80.40%), AAC-1 can be used as a resistance source. Study on growth and flower yield of China aster genotypes revealed that the cv. PG White (71.37 cm) recorded the highest plant height. The genotype Arka Archana recorded highest numbers of branches (28.83) and flowers per plant. However the maximum flower yield (21.99 t / ha) was recorded by the cv. PG Pink.
Screening of F2 population under natural disease pressure conditions revealed that both the crosses (AAC-1 x Arka Kamini and PG Purple x AAC-1) fit reasonably well to segregation ratio of 3 resistant : 1 susceptible. Estimates of high heritability with high genetic advance as per cent of mean (GAM) were observed for plant height, number of leaves, number of branches per plant, number of flowers per plant and flower yield per hectare in the both the crosses indicating the possible role of additive gene action. In general for all the characters studied in the two F2 population viz., AAC-1 x Arka Kamini and PG Purple x AAC-1 emerged as potential population for improving productivity and disease resistance in China aster. Among the genotypes studied, PG Pink and AAC-1 have emerged as promising genotypes.
Description
TH565
Keywords
null