Yield and Yield Components of Various Wheat Cultivars as Affected by Different Sowing Dates

Shahzad, Khurram; Bakht, Jehan; Shah, Wajid Ali; Shafi, Muhammad; Jabeen, Nadia

doi:10.3923/ajps.2002.522.525

Cited by 53 publications

(30 citation statements)

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“…There was no significant difference between PR-106 and PR-108 at planting dates. These findings are supported by those of Hanson [21], who reported significant variation in number of grains spike -1 with sowing dates. Maximum number of grain spike -1 (57.6) was produced for wheat line PR-103 while minimum number grains spike -1 (53.3) was produced for PR-109 at all sowing dates.…”

Section: Agricultural Research and Technology: Open Access Journalsupporting

confidence: 85%

Evaluation of Wheat Advanced Lines for Agronomic Traits under Vary Sowing Dates

Ullah¹

2017

ARTOAJ

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Section: Agricultural Research and Technology: Open Access Journalsupporting

confidence: 85%

Evaluation of Wheat Advanced Lines for Agronomic Traits under Vary Sowing Dates

Ullah¹

2017

ARTOAJ

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“…A timely planted crop experienced more time with suitable temperature for tillering, has better leaf area index and ultimately recorded more fertile tillers resulting in higher yield returns (Donaldson et al ., 2001; Shahzad et al ., 2002). Further, longer spikes observed in timely sown crop might be due to higher leaf area and longer duration experienced by the crop, resulting in more dry matter accumulation and better grain weight.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Triticum durum–Aegilops tauschii derived primary synthetics as potential sources of heat stress tolerance for wheat improvement

Kaur

Chhuneja

Srivastava

et al. 2021

Plant Genet. Resour.

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Addressing the impact of heat stress during flowering and grain filling is critical to sustaining wheat productivity to meet a steadily increasing demand from a rapidly growing world population. Crop wild progenitor species of wheat possess a wealth of genetic diversity for several biotic and abiotic stresses, and morphological traits and can serve as valuable donors. The transfer of useful variation from the diploid progenitor, Aegilops tauschii, to hexaploid wheat can be done through the generation of synthetic hexaploid wheat (SHW). The present study targeted the identification of potential primary SHWs to introduce new genetic variability for heat stress tolerance. Selected SHWs were screened for different yield-associated traits along with three advanced breeding lines and durum parents as checks for assessing terminal heat stress tolerance under timely and late sown conditions for two consecutive seasons. Heat tolerance index based on the number of productive tillers and thousand grain weight indicated that three synthetics, syn9809 (64.32, 78.80), syn14128 (50.30, 78.28) and syn14135 (58.16, 76.03), were able to endure terminal heat stress better than other SHWs as well as checks. One of these synthetics, syn14128, recorded a minimum reduction in thousand kernel weight (21%), chlorophyll content (2.56%), grain width (1.07%) despite minimum grain-filling duration (36.15 d) and has been selected as a potential candidate for introducing the terminal heat stress tolerance in wheat breeding programmes. Breeding efforts using these candidate donors will help develop lines with a higher potential to express the desired heat stress-tolerant phenotype under field conditions.

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“…Similar to our findings, Guendouz et al [78] showed that irrigation conditions and WUE strongly influenced the grain yield of durum wheat cultivars. Improved crop-water relationships offer substantial opportunities to improve WUE by using deficit irrigation, soil water, and nutrient management approaches under varying agro-climatic conditions [79,80].…”

Section: Discussionmentioning

confidence: 99%

Performance of Hybrid Wheat Cultivars Facing Deficit Irrigation under Semi-Arid Climate in Pakistan

et al. 2021

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Predicted decrease in water availability for crop production and uncertainty in climatic conditions require devising the irrigation strategies to increase water use efficiency (WUE) for sustainable crop production. The development of crop cultivars with higher WUE is a pre-requisite for such strategies, particularly in developing countries, including Pakistan, who face stern food security challenges. A two-year field study was conducted following a split-plot randomized complete block design to understand the effects of wheat cultivars (hybrid cultivars, 18A-1 and 18A-2, and local cultivar Ghaneemat IBGE-2016), sowing dates (15th November, 30th November, and 15th December), and irrigation regimes [I (103 mm), II (175 mm), III (254 mm), and IV (330 mm) at four different growth stages of tillering, booting, anthesis and grain filling on wheat productivity, biomass production and grain yield, and crop-water relations. Early sown hybrid cultivars 18A-1 and 18A-2 showed significantly higher biological and grain yields compared to the local cultivar (59% and 69% higher than the local cultivar). Trends in biomass production and grain yield were also similar at later sowing dates of 30th November and 15th December. However, biological and grain yields decreased with delay in sowing for each cultivar. The data also revealed that hybrid cultivars were better suited to deficient irrigation and generally produced significantly higher biological and grain yields under each moisture regime. Cultivars, sowing dates, and irrigation regime differed significantly for their effects on the Soil Plant Analysis Development (SPAD) values, chlorophyll a and b contents but not for carotenoids. Sowing dates and irrigation regimes had significant effects on relative water content (RWC), water saturation deficit (WSD), water uptake capacity (WUC), and water retention capacity (WRC); however, only WUC varied significantly between the cultivars. The phenological data show that hybrid cultivars took more days to maturity and grain filling than the local cultivar, and days decreased with delayed sowing. The biological and grain yields show significant positive correlations with SPAD values (p < 0.001) and days to maturity (p < 0.001). Our study shows that hybrid wheat cultivars can be opted for higher biomass production and grain yields under deficit irrigation scenarios of semi-arid climatic conditions in Pakistan. Moreover, the hybrid wheat cultivars can perform better than the indigenous cultivar even for delayed sowing dates of 30th November and 15th December.

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Yield and Yield Components of Various Wheat Cultivars as Affected by Different Sowing Dates

Cited by 53 publications

References 0 publications

Evaluation of Wheat Advanced Lines for Agronomic Traits under Vary Sowing Dates

Evaluation of Wheat Advanced Lines for Agronomic Traits under Vary Sowing Dates

Evaluation of Triticum durum–Aegilops tauschii derived primary synthetics as potential sources of heat stress tolerance for wheat improvement

Performance of Hybrid Wheat Cultivars Facing Deficit Irrigation under Semi-Arid Climate in Pakistan

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