Abstract
Fifteen wheat genotypes namely Agrani, Prodip, Bijoy, CB 69, Sourav, Sufi, BAW 1064, Gourab, Kanchan Shatabdi, CB 30, Sonora, CB 24, CB34, and Protiva were sown under optimum (Nov. 30) and late (Dec. 30) sowing times to evaluate their performances at high temperature depending on cell membrane thermostability and some morpho-physiological characters. Based on cell membrane thermostability test four genotypes showed the longest heat killing time and were separated as heat tolerant (HT). Four genotypes showed the shortest heat killing time and were separated as heat sensitive (HS). The remaining seven genotypes required time in between those two were separated as intermediate heat tolerant (IHT) genotypes. Lower contribution of photosynthate stem reserves (PSR) to grain in HT genotypes finally contributed to its less affected 1000-grain weight as well as yield. These results suggest that greater cell membrane thermostability supported the minimal changes in some physiological characters of HT ganotypes which ultimately increased the wheat yield under short winter warmer condition. Keywords: Membrane thermostability; Wheat genotype DOI: 10.3329/jbau.v7i2.4729 J. Bangladesh Agril. Univ. 7(2): 241-246, 2009
Highlights
Wheat (Triticum aestivum L) is an important cereal crop in Bangladesh as well as in the world
Fifteen genotypes of wheat (Triticum aestivum L.) namely Agrani, Prodip, Bijoy, CB 69, Sourav, Sufi, BAW 1064, Gourab, Kanchan, Shatabdi, CB 30, Sonora, CB 24, CB34, and Protiva were selected as experimental material
Ltd., Japan) and washed three times with deionized water to remove electrolytes adhering to leaf tissue, as well as electrolytes released from cut cells on the periphery of leaf discs
Summary
Wheat (Triticum aestivum L) is an important cereal crop in Bangladesh as well as in the world. Fifteen genotypes of wheat (Triticum aestivum L.) namely Agrani, Prodip, Bijoy, CB 69, Sourav, Sufi, BAW 1064, Gourab, Kanchan, Shatabdi, CB 30, Sonora, CB 24, CB34, and Protiva were selected as experimental material. Cell membrane thermostability differed among the wheat genotypes under both optimum and late sowing heat stressed condition.
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