The Effects of Drought Stress on Yield, Yield Components, and Yield Stability at Different Growth Stages in Bread Wheat Cultivar (Triticum aestivum L.)

Abstract

Bread wheat (Triticum aestivum L.) is one of the most important cereal crops in the development of humans. Wheat, with about a 2.1 million km 2 total harvested area, is the most abundant crop in the world: it is the first rain-fed crop after maize and the second irrigated crop after rice [1]. With a total production that surpassed 700 million tons (MTons) in 2010, it is contributing to about the 20% of the total dietary calories and proteins worldwide [2, 3]. Compared to other important crops,

Performance and Stability of some Bread Wheat Genotypes across Terminal Water and Heat Stresses Combinations Using Biplot Techniques

“…These results indicated a considerable reduction in number of spikes/m 2 under combination of heat and drought stresses which, are in agreement with those reported by many wheat researchers e.g. Rebetzke et al (2008), Dreccer et al (2009), Dreccer et al (2012) and Mehraban et al (2019). Table 5.…”

“…Furthermore, this genotype can be utilized as a source for terminal heat and drought stresses or recommended for affected heat and drought stresses region. These results indicated that a detrimental effects on grain yield when heat and drought combined together than either alone these results in harmony with those obtained by Abro et al, (2019), Mehraban et al, (2019) and Feltaous et al, (2020). Consequently, selecting the most high yielding and stable genotype/s is an effective breeding strategy for heat and drought tolerance.…”

“…Both of them affect on grain size, grain number/spike, and 1000-grain weight, and grain filling rate. Consequently result in a substantial reduction in wheat grain yield up to 42% under drought conditions as reported by Mehraban et al (2019) and 48% reduction under terminal heat stress as reported by Abro et al (2019).…”

“…Similar results were obtained by Feltaous et al (2020), where they declared a high reduction in number of days to maturity as a result of terminal heat stress conditions. Mehraban et al (2019) stated a considerable reduction in number of days to maturity under water stress conditions.…”

Stability analysis of wheat lines with increased level of arabinoxylan

“…Similarly, Karaman et al [24] compared irrigated and rainfed conditions, while Beres et al [25] considered both moisture and N fertilitisation in their studies in Canada. Other studies have also determined effects on grain morphology and/ or yield components [26,27], but less studies are available on the stability of grain compositon and quality. Both grain yield and some quality traits (thousand kernel weight, test weight, protein, starch, gluten, Zeleny, Alveograph) were determined to identify stable wheat genotypes in Turkey [28,29,30], and in India [31], while Silva et al [32] also considered the effect of the sowing dates on the stability of these traits in Brazil.…”