Journal of Food, Agriculture and Environment
Vol 12,
Issue 1,2014
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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Stability of sunflower hybrids for earliness and achene yield over environments
Author(s):
Syed Asmatullah Taran 1*,
Naqib Ullah Khan 2, Mohammad Azam Kakar 3, Meer Muhammad Khan 1, Muhammad Saeed 2, Mujahid Iqbal 1, Sadiq Agha 4, Fazal Ahmed 4Recieved Date: 2013-09-29, Accepted Date: 2014-01-17
Abstract:Stability for earliness and achene yield was determined for 14 sunflower (Helianthus annuus L.) hybrids grown at three locations (Quetta, Khuzdar and Loralai) during summer of 2007 in the uplands of Balochistan, Pakistan. The objective of the study was hybrid selection based on stability in addition to earliness and high yield. Hybrids, locations and genotype by environment interaction (GEI) effects were highly significant for earliness and achene yield, which confirmed variations due to locations and genetic variability among hybrids. The contribution of genotype, environment and G × E interaction sum of squares to total sum of squares were 54.14%, 22.47% and 23.39%, respectively for earliness, while 28.70%, 30.00% and 41.21% for achene yield. This showed that genotypes played a greater role in earliness, while G × E interactions were predominant for yield. Khuzdar produced early maturing hybrids due to high temperatures, while at Quetta and Loralai the same hybrids were comparatively late due to low temperatures. Therefore, sunflower sowing in June was found suitable as the crop could complete their growth cycle before commencing of low temperatures. In stability measures, the genotypic mean squares, coefficient of variation and regression coefficients revealed that hybrids Parsun-1 and Hysun-33 were found stable, early to medium maturing, high yielding and suitable to the cropping system. Total hybrid stability for earliness and yield was not proved; however, further breeding could contribute towards developing local hybrids with early maturity and better yield potential.
Keywords:Achene yield,
earliness, environmental factors, phenotypic performance, genotype by environment interaction, stability analyses, Helianthus annuus L. hybrids, uplands of Balochistan, PakistanJournal: Journal of Food, Agriculture and Environment
Year: 2014
Volume: 12
Issue: 1
Category: Agriculture
Pages: 317-322
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