Genotypic Variations in Wheat under Different Sowing Times – Abstract

Journal of Environmental and Agricultural Sciences (JEAS). Sattar et al., 2015. Volume 2: 8

Open Access – Research Article

Genotypic Variations in Wheat for Phenology and Accumulative Heat Unit under Different Sowing Times
Abdul Sattar1, Muhammad Mahmood Iqbal2, Ahsan Areeb1, Zeeshan Ahmed3, Muhammad Irfan1,
Rana Nauman Shabbir3, Ghulam Aishia4 and Saddam Hussain 4, 5*
1 Department of Agronomy, University of Agriculture, Faisalabad-38040, Pakistan
2Ayyub Agriculture Research Institute Jhang Road, Faisalabad-38040, Pakistan
3 Department of Crop Physiology, University of Agriculture, Faisalabad-38040, Pakistan
4 College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
5College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei 430070, China

Abstract: Delay in wheat is perhaps the one of the major factors responsible for low crop yield mainly due to the sub-optimal temperature during the different phenological stages. A field study was carried out to investigate the phenological performance of five newly developed wheat cultivars (Lasani-2008, Faisalabad-2008, Shafaq-2006, Sahar-2006 and Inqlab-91) under early (10-November) and the late sown (10-December) conditions during 2011-12 growing season. The experiment was laid out in randomized complete block design under factorial arrangement of treatments replicated four times. Results indicated that delay in sowing of wheat was detrimental for its growth. Early sown wheat got more number of days to attain different phenological stages, higher heat unit and heat use efficiency as compared to the late sowing. In case of late sowing, the cultivars phased a significant level of high temperature stress that affected the required days to crown root initiation, tillering, booting, heading, anthesis, grain filling and maturity of all cultivars as compared with early sown crop. When wheat was sown late in season, the heat use efficiency was reduced in the range of 21-35% across different cultivars compared with early sown crop. Variations were also apparent among cultivars regarding their response to sowing dates. The cultivar Faisalabad-2008 ontogenically being more plastic, performed well in late sown conditions, nonetheless, cultivar Iqlab-91 remained superior to rest of cultivars, when planted early in season. These results are of practical concern for wheat growers in Pakistan and may be fruitful in future for crop modelling in wheat.

Keywords: Growing degree days, HUE, Heat use efficiency, Air temperature, Wheat

*Corresponding author: Saddam Hussain, Email:

Cite this article as:
Sattar, S., M.M. Iqbal, A. Areeb, Z. Ahmed, M. Irfan, R.N. Shabbir, G. Aishia and S. Hussain. 2015. Genotypic variations in wheat for phenology and accumulative heat unit under different sowing times.Journal of Environmental & Agricultural Sciences. 2:8. [View Full-Text] [Citations]

Copyright © Sattar et al., 2015. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium provided the original author and source are appropriately cited and credited.

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