Effect of curd size on seed quality of cauliflower (Brassica oleracea var. botrytis) under rainfed hill condition of Uttarakhand
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Date
2008-07
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The present investigation was carried out during Rabi season, 2006-07 on the late maturing variety of cauliflower Pusa Snowball K-1. The data obtained during the course of investigation in the field were analyzed by using standard statistical procedure of Completely Randomized Block Design and those from the laboratory by Completely Randomized Design. All plants were differentiated on the basis of their curd diameter, in to five groups i.e. extra-large, large, medium, small and very-small. Curds of diameter 0 to 7.0 cm were taken as very-small, 7.1 to 14.0 cm as small, 14.1 to 21.0 cm as medium, 21.1 to 28.0 cm as large and above 28.1 cm as extra-large size curds. These curd sizes were analyzed visually for their plant morphological features, seed yield and yield contributing characters of the plant, chemical tests and seed vigour parameters.
The seed yield and yield contributing characters of cauliflower, viz. curd diameter, days to curd initiation, days to flowering stalk initiation, height of flowering stalks at maturity, number of primary branches, number of secondary branches, number of siliqua per plant, 1000-seed weight, seed yield per plant etc. were compared with each other. Chemical parameters viz. phenol colour reaction, NaOH/KOH colour reaction and peroxidase activity test were used in the present study. All the chemical tests reacted positively with the cultivar indicates their effectiveness. Among seed vigour parameters first count, standard germination, seedling length, seedling fresh weight, seedling dry weight, Tz test, electrical-conductivity of seeds, seedling vigor index I and seedling vigor index II were observed and compared with each other. Significant correlation was observed between curd diameter, number of siliqua and seed yield. An overview of the results from the present investigation demonstrated a wide spectrum of variation in respect of seed yield and its contributing characters and seed vigour parameters. It can be concluded that among the five curd size treatments, extra-large curd size showed maximum potential for seed yield while extra-large and medium curd sizes were promising for seed quality parameters. These curd sizes can be further utilized for their potential for producing
quality seed of cauliflower under mid and high hills of Uttarakhand.
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