GENERATION MEAN ANALYSIS FOR YIELD AND YIELD TRAITS IN OKRA [Abelmoschus esculentus (L.) Moench]
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Date
2009-01
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K.R.C. COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
uenerauon mean analysis was carried out by developing P1, P2, F1, F2, BC; and 3C2 generations using Cross-I (INDO-S X Arka Anamika), Cross~II (OLR-Ol X Arka Anamika) and Cross-III (INDO-S X Parbhani Kranti) of okra to estimate the gene effects
for various traits via, plant height, number of leaves, number of branches, number of nodes upto lirst flowering, days to first flowering and lirst harvest, fruit length and diameter, average fruit weight, number of huits and total yield per plant, hundred seed weight and number of locules, ridges and seeds per fruit Heterobeltiosis and inbreeding depression were significant for most of the parameters in all the three crosses. The estimates of heritability and genetic advance over mean were low for majority of the
traits studied.
Scaling test revealed the presence of epistasis for all the traits studied except for
number of nodes upto first flowering and number of ridges per fruit in Cross-DI, number of fruits per plant in Cross-I, number of seeds per fruit and number of ridges per fruit in Cross-II. Dominant gene action is predominant for plant height and number of fruits per plant in all the three crosses, number of leaves, number of branches, fruit length, average fruit weight and total yield per plant in Cross-H and Cross-Ill, number of nodes upto first flowering in Cross-I and Cross-HI, fruit diameter in Cross-I, hundred seed weight in Cross-II and days to first flowering and number of ridges per fruit in Cross-Ill Additive gene action is predominant for number of branches and number of seeds per fruit in Cross-I and number of ridges per fruit in Cross-II. Duplicate epistasis played important ole in controlling days to first harvest and fruit diameter in Cross-II and Cross-Ill, Verage fruit weight and total yield per plant in Cross-I and hundred seed weight in Etoss-I and Cross-III. Complementary epistasis played important role in controlling fruit
ngth in Cross-I.
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TH343
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