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Seed emergence (m-2), tillers plant-1and plant height (cm) of wheat as affected by various cultivars under the agro-ecological conditions of Tandojam.
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wheat cultivars TD-1 and Moomal-2002 may be grown for maximum growth and yield under the agro-ecological conditions of Tandojam, Sindh, Pakistan
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Context 1
... Emergence (m -2 ) Seed emergence determines the initial growth stage of every crop. The data regarding seed emergence was significantly (P < 0.05) influenced by cultivars in both years ( Figure 2A). The cultivar, Moomal-2002 showed a significantly (P < 0.05) higher number of seed emergence (222.2 and 223 m -2 ) as compared to other varieties. ...
Context 2
... results exhibited that greatest tillers plant -1 (8.5 and 10.1) were obtained in cultivar Moomal-2002 under both wheat growing seasons. The significantly (P< 0.05) lowest tillers plant -1 (4.8 and 5.5) were recorded in Imdad-2005 in both seasons ( Figure 2B). Furthermore, the results showed that the tillers plant -1 were increased in the 2 nd season as compared 1 st season. ...
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... analysis results of plant height were significantly (P < 0.05) differences in both years ( Figure 2C). Results of the present investigation indicated that the cultivar Moomal-2002 significantly (P < 0.05) produced the tallest plants (101.3 and 100.8 cm) under both seasons, respectively. ...
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... Said et al. (2007) in their experiment reported that genotype performance was significant for flag leaf area while non-significant results were obtained by Akmal et al. (2000). Similarly, for spike length significant differences were observed across two seasons (Bhutto et al., 2021). In another experiment, it has been reported that spikelets spike -1 varied significantly across sowing dates but the genotype difference was non-significant (Hussain et al., 2021). ...
... Said et al. (2007) in their experiment reported that genotype performance was significant for flag leaf area while non-significant results were obtained by Akmal et al. (2000). Similarly, for spike length significant differences were observed across two seasons (Bhutto et al., 2021). In another experiment, it has been reported that spikelets spike -1 varied significantly across sowing dates but the genotype difference was non-significant (Hussain et al., 2021). ...
... Said et al. (2007) in their experiment reported that genotype performance was significant for flag leaf area while non-significant results were obtained by Akmal et al. (2000). Similarly, for spike length significant differences were observed across two seasons (Bhutto et al., 2021). In another experiment, it has been reported that spikelets spike -1 varied significantly across sowing dates but the genotype difference was non-significant (Hussain et al., 2021). ...
Wheat is one of the important staple crops of the world. Its grain yield is affected by various factors including genotype and planting time. An experiment was conducted to study the yield performance of 10 different wheat advanced genotypes (PR-133, PR-135, PR-136, PR-137, PR-138, PR-139, PR-140, Khaista-17, Gulzar-19 and Pirsabak-19) at different sowing times of 15-days interval. A pooled analysis across the same environment revealed a significant difference (P≥ 0.01) for all the parameters i.e. days to heading, days interval, plant height, flag leaf area, tillers m-2, spike length, spikelet spike-1, grain spike-1, thousand grain weight, grain yield and biological yield across three planting dates i.e. early, normal, and late respectively. Differences between wheat genotypes and genotype-environment interaction were also highly significant (P≥ 0.01) for studied traits, indicating that genotypes performed differently in three sowing times. Under early, normal and late planting, genotypes PR-138, PR-140 and Gulzar-19 had the highest grain yield respectively. PR-138 performed outstandingly across three sowing times for seed yield. Hence, it is concluded from the present study that delayed sowing progressively decreases the yield performance of the studied genotypes and the most suitable sowing time is from 15th October to 15th November.
... Said et al. (2007) in their experiment reported that genotype performance was significant for flag leaf area while non-significant results were obtained by Akmal et al. (2000). Similarly, for spike length significant differences were observed across two seasons (Bhutto et al., 2021). In another experiment, it has been reported that spikelets spike -1 varied significantly across sowing dates but the genotype difference was non-significant (Hussain et al., 2021). ...
... It is grown under both irrigated and rain-fed conditions, is classified as a domesticated, self-pollinating crop, and has played a significant role in the development of numerous diverse domesticated wheat varieties (Ijaz et al., 2015). Wheat is a staple food of a huge human population globally consumed, processed and refined (Bhutto et al., 2021). Bread wheat provides approximately 70% of calories and 80% of protein (Ahmed et al., 2022). ...
... Wheat is a major crop consumed by half of the world population (Bhutto et al., 2021). During flowering and booting stages of wheat crops were more affected by heat stress (Yang et al., 2016;Mirosavljević et al., 2021). ...
Developing bread wheat genotypes for terminal heat tolerance is a critical objective for future breeding approaches. The line x tester mating analysis is one of the best approaches to demonstrate the appropriateness of the bread wheat genotypes for selection programs. For this purpose, nine genotypes viz. T.J-83, NIA Sarrang, Khirman, SKD-1, Sehar-2006, Sarsabaz, AS-2002, NIA-Amber, and Nifa Barsat were used in this research. The experiment was planned in a factorial design with two treatments (normal and heat stress) at Botanical Garden Farm, Sindh Agriculture University Tandojam, during 2019-2020. The results depicted that at terminal heat stress, the genotypes were significantly affected by yield and physiological traits at late sowing. During the initial screening, the female parents, T.J-83, Sarsabaz, and Nifa Barsat executed very well under heat stress conditions for nearly all the yield and morphological traits. Similarly,the male parents such as Khirman and SKD-1 also performed well under heat stress conditions for all traits compare to the female parents. Furthermore, through genetic analysis, the mean effects of General Combining Ability (GCA) and Specific Combining Ability (SCA) were significant for all the characters signifying that additive and non-additive variances are important. Further, in heat-stress environments, the GCA was dominant for most characters in contrast to SCA variations. Hence, in this study, under both normal and heat stress conditions, Khirman and SKD-1 proved to be better general combiners for various characters. Therefore, these genotypes are recommended as vigor parents for hybridization and selection programs as emerging terminal heat stress tolerant genotypes.
... Crop in AEP exposed to a relatively higher daily temperature with adequate irrigation hence showed the same height as observed in AEC. Whereas lines showed longer internode length while comparing AEP with AEC and AEK., Plants with longer internodes are the genotype better interaction with the environment (Bhutto et al., 2021). ...
Abstract | Despite the genetic potential, the yield performance of a genotype is expressed in the prevailing environments. A high yielding genotype may not necessarily reflect its potential performance when subjected to
a different Agro-Environment (AE). This study, therefore, aimed to assess the foremost developmental stages
of the selected genotypes of wheat in three AE i.e. AEP (Peshawar), AEK (Kashmir) and AEC (Chitral). An
experiment was conducted in a randomized complete block, having 3 replications. Four cultivars (i.e. Pirsabak-2005, Pakhtunkhwa-2015, Pakistan-2013 and DN-84) along with three advanced lines (i.e. P-2, P-12 and
P-18) were compared for the crop growth seasons (i.e. 2017-18 and 2018-19). Averaged across genotypes, days
to emergence, heading, anthesis, and maturity did differ (p<0.05) in various AE, with highest in higher altitudes
and lowest in the plains area. Genotypes differed in crop developmental stages with mild to marked effects on
tiller height, spike length, spike weight and unit grain weight, which has resulted in significant changes (p<0.05)
for biomass and grain yield. Harvest indices did differ for AE among genotypes. Based on the experimental
results, it is concluded that a genotype may not necessarily perform similar in production with changing the
AE. However, with a close association of the crop developmental stages, more than one genotype can be recommended to perform good within different AE to adress future food security. Moreover, expressing suitable traits,
a genotype could be used as a source of well breeding material for ensuring food security in changing climate.
