Influence of sowing dates on yield and its components in some early maturing bread wheat genotypes | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 6, Volume 99, Issue 3, September 2021, Page 296-313 PDF (713.2 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2021.89865.1131 | ||||
 View on SCiNiTO | ||||
| Author | ||||
Ahmed H. Ahmed 
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| Wheat Research Department,Field Crops Research Institute, Agriculture Research Center,Egypt. | ||||
| Abstract | ||||
| Nine bread wheat early maturing promising lines and three local cultivars were evaluated at Mallawy Agric. Res. Stations, ARC, Egypt, for the two successive growing seasons of 2018/2019 and 2019/2020 under the two sowing dates, the recommended (SD1:30th November) and the late sowing date (SD2:30th December). A split-plot arrangement with three replicates was used in each season. The aim of this study was to select the best genotypes for early maturity and higher grain yield. The results showed significant differences among genotypes for all studied traits in the optimum sowing date (SD1) compared to late sowing date (SD2). The optimum sowing date (S1) produced the highest values for all studied traits in both seasons, while the late sowing date (S2) was recorded the earlier plants for heading and maturity dates. The studied genotypes differences significantly in all estimated traits, lines 1 and 2 had the earliest genotypes for heading days, while Giza 171 and line 8 were the latest one for this trait. On the other hand, lines 9 and 4 were the earliest genotypes for maturity date, while the latest one was recorded for Giza 171. Line 5 surpassed all the other genotypes in grain yield (28.31 and 23.17 ard. fed-1) in the first and second seasons, respectively and it is appeared to be more tolerant to late sowing date as well as heat stress. The interaction (SD x G) had a significant effect on most studied traits. Lines 9 and 6 were the earliest genotypes for maturity when sown on 30 Nov. also, lines 9 and 4 were the earliest genotypes when sown on 30 Dec. The highest grain yield was obtained from line 4 followed by line 5 when sown on 30 Nov. and line 5 had the highest grain yield when sown on 30 Dec. in the first season. While, in the second season, lines 5 and 8 recorded the highest grain yield when sown on 30 Nov. and 30 Dec. respectively. Line 5 is suitable for planting in a wide range of planting dates (from 30th Nov. to 30th Dec.). Moreover, it is early maturing and can be recommended for late sowing (30th Dec.). Therefore, the results of the present study confirmed that lines 4, 5, 7, and 6 were superior over the other genotypes in producing the earliest maturity date and higher grain yield and can be used, in the future, in bread wheat breeding programs for the development of wheat cultivars for high-temperature stress condition at the terminal growth stage. | ||||
| Keywords | ||||
| wheat; Heat stress; Earliness; Yield and its components | ||||
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