Article Number: PRJA56615514


Vol. 1 Issue 2, pp: (23-32), May 2016.
Article Number: PRJA56615514
Copyright ©2016
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Full Length Research Paper

Evaluation of Heterosis in Exotic Eggplant

Mohammad Shahjahan1*, Khairul Kabir1, Shakil Arvin Zomo2Md. Dulal Sarkar1, Mohi Uddin Fazlullah3

1Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

2Department of Agricultural Extension, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

3Department of Entomology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Corresponding author: shahjahansau@gmail.com

 Received: February 28, 2016  Accepted: May 2, 2016  Published: May 6, 2016

ABSTRACT

Heterosis breeding is one of the most efficient tools to exploit the heterotic response for various useful traits. The best way to utilize heterosis in crop is to generate F1 hybrids having maximum heterozygocity, thereby facilitating the identification and selection of hybrid vigor. To study the heterosis in some selected crosses involving the eggplant genotypes, Ral 1, Ral 2, Ral 3, Ral 4, Ral 5, Ral 6, Ral 7, Ral 8, Ral 9, BARI Begun 7 and BARI Begun 8 were used. Data were collected from eight successful crosses and their parents. Data on days to first flowering, days to 50% flower, east-west plant canopy, north-south plant canopy, number of primary branches per plant, number of secondary branches per plant, fruit weight, fruit length, fruit breadth, days to fruit maturity, plant height, number of fruits per plant and yield per plant were recorded from five randomly selected plants from each plot. Heterosis was estimated following the additive dominance model. The mean values of the eight F1 were compared with better parents (BP) for heterobeltiosis (Hb%) and with mid parents (MP) for relative heterosis (Ht%).  In case of fruit length, fruit breadth and fruit weight, Ral 7 x Ral 8 and Ral 3 x Ral 8 crosses gave the positive heterosis and heterobeltiosis. Some cross combinations such as Ral 5 x Ral 9, Ral 3 x BARI Begun 7, Ral 3 x Ral 7, Ral 6 x Ral 9 and Ral 6 x Ral 7 are exhibited significant positive relative heterosis and heterobeltiosis for the number of fruits per plant and besides these, all the cross combinations exhibited better for yield per plant. Hybrid seed production in Ral 3 x BARI Begun 7, Ral 3 x Ral 7, Ral 3 x Ral 8 and Ral 7 x Ral 8 crosses is suggested for further study.

Key words: Heterosis, vegetative characters, hybrid, eggplant.