Phasic development of spring wheat and stability of yield and its components in hot environments

Ishag, H. M.; Mohamed, Badreldin A.

doi:10.1016/0378-4290(95)00100-x

Cited by 25 publications

(13 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, next to grains/unit area, grain weight is the most important component of grain yield under heat stress in wheat species (Khanna‐Chopra and Viswanathan 1999). Heat stress reduces grain weight by decreasing grain growth duration (Stone and Nicolas 1995, Ishag and Mohamed 1996) and grain growth rate (Sofield et al. 1977, Tashiro and Wardlaw 1989).…”

Section: Resultsmentioning

confidence: 99%

Effect of Heat Stress on Grain Starch Content in Diploid, Tetraploid and Hexaploid Wheat Species

Chinnusamy¹,

Khanna‐Chopra²

2003

J Agronomy Crop Science

View full text Add to dashboard Cite

Heat stress during grain development adversely affects the starch content of grain in wheat, which results in poor grain quality and yield. Identification of the sources of heat tolerance for grain starch content in wheat species is an important step towards breeding for heat‐tolerant wheat. In this study, 32 wild and cultivated genotypes belonging to diploid (probable donors of B, A and D genomes), tetraploid (BBAA and AAGG genomes) and hexaploid (BBAADD genome) wheat species were evaluated for heat stress tolerance in the field at the Indian Agricultural Research Institute (IARI), New Delhi, India (77°12′ E; 28°40′ N; 228.6 m m.s.l) on two dates, 18 November (normal sowing) and 15 January (heat stress), during 1995–96. The crop sown in January experienced mean maximum temperatures of 31.0–39.3 °C during grain development, which are considered to represent heat stress for wheat grain development. Hexaploids had the highest grain starch content and the lowest heat susceptibility index, followed by tetraploid and diploid species. The heat susceptibility index (S) for grain starch correlated significantly and positively with that of grain weight (Y = 1.259X − 0.29, R2 = 0.8902, P < 0.001) across wheat species, while the actual grain growth duration or the ‘S’ of grain growth duration did not correlate significantly with that of grain weight. Hence, a high mean grain growth rate under heat stress is a better trait for heat tolerance than long grain growth duration. Wide genetic variability for heat tolerance in grain starch content was observed among the wheat species. Hence, the grain weight and quality under heat stress can be improved by using the variability available among wheat species.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of Heat Stress on Grain Starch Content in Diploid, Tetraploid and Hexaploid Wheat Species

Chinnusamy¹,

Khanna‐Chopra²

2003

J Agronomy Crop Science

View full text Add to dashboard Cite

show abstract

“…The yield difference between years might be attributed to variable temperature, leading to better leaf area duration, average crop growth rate and long grain filling period during 2 nd year of experimentation, which is similar to the finding of [5,27] observed that the duration of grain filling in cereals (wheat) is determined by temperature. [28] reported that an increase in 10˚C can cause decrease of 4 mg in grain weight. [29] observed that the penalty in terms of crop yield associated with delayed planting is in the order of 1 percent yield loss per day.…”

Section: Grain Yieldmentioning

confidence: 99%

Yield and Yield Components of Bread Wheat as Influenced by Water Stress, Sowing Date and Cultivar in Sokoto, Sudan Savannah, Nigeria

Sokoto¹,

Singh²

2013

AJPS

View full text Add to dashboard Cite

Field experiments were conducted during 2009/10 and 2010/2011 dry seasons at the Fadama Teaching and Research Farm of the Usmanu Danfodiyo University, Sokoto, in the Sudan Savanna ecological zone of Nigeria (latitude 13˚01'N; longitude 5˚15'E, altitude of 350 m above sea level) to study the effect of water stress, sowing date and cultivar on yield and yield components of wheat (Triticum aestivum L.). The treatments consisted of factorial combination of water stress at three critical growth stages which was imposed by withholding water at tillering, flowering, grain filling and control (no stress), four sowing dates (21 st November, 5 th December, 19 th December and 2 nd January) and two bread wheat cultivar (Star 11 TR 77173/SLM and Kuaz/Weaver), laid out in a split-plot design with three replications. Water stress and date of sowing were assigned to the main-plot, while variety was assigned to the sub-plots. Result revealed that water stress at tillering significantly reduced spike length and grains per spike. Whereas, water stress at flowering and grain filling significantly reduced 1000-grain weight, grain yield and harvest index. Results also indicated significant (P < 0.05) effect of sowing date on length of spike, spikelets per spike, grains per spike and grain yield. Early sown wheat significantly differed from the late sown wheat in all parameters measured. Yield and yield components decreased with delay in sowing date and it was highest at 21 st November and 5 th December and lowest at 19 th December and 2 nd January, therefore wheat should be sown in November or at least first week of December in this area and other area with similar climate. Variety had significant effect on spike per m −2 , grain yield and harvest index. Water stress at flowering and grain filling should be avoided as they are the most critical growth stages in yield determination in wheat, because plants cannot recover, while delay in sowing resulted in reduction in yield and yield components. Star II TR 77173/SLM is therefore recommended for the area.

show abstract

“…1995). In these environments, temperatures as high as 38°C are very common during the grain‐filling period (Ishag and Mohamed 1996, Tahir et al. 2005).…”

mentioning

confidence: 99%

“…2005). A number of studies were carried out to study the effects of high‐temperatures on growth and grain yield of wheat (Ishag and Mohamed 1996, Tahir et al. 2005).…”

mentioning

confidence: 99%

Genotypic and temperature effects on wheat grain yield and quality in a hot irrigated environment

et al. 2006

View full text Add to dashboard Cite

High temperature influences both grain yield and end-use quality of wheat. The objectives of this study were to evaluate the performance of selected wheat genotypes under heat stress and to examine the effects of high temperatures during grain filling on grain yield and end-use quality parameters. Fifteen bread wheat genotypes in 2000/2001 and 18 genotypes in 2002/2003 were evaluated under the optimum and latesowing conditions of the irrigated hot environment of the Gezira Research Farm, Wad Medani, Sudan. The genotypes comprised released varieties and elite lines from the Sudanese wheat improvement programme. Data collected included grain yield, grain weight and grain end-use quality including protein content, protein composition, SDS sedimentation values (SDSS) and gluten strength as determined by mixograph analyses. High temperatures significantly decreased grain yield by decreasing grain weight. Although genotypes exhibited variation in magnitude of response, results indicated that high temperature during grain filling increased both soluble and insoluble protein contents, SDSS, mixograph peak height (MPH) and the descending slope at 2 min past peak (MDS). In contrast, mixograph peak time (MPT) and the curve width at 2 min past peak (MCW) were significantly decreased. Flour protein correlated positively with SDSS, MPH and MDS and negatively with MCW. MPT correlated negatively with MDS and positively with MCW. Results indicate that high temperature increased both soluble and insoluble protein contents, SDSS and MPH, and hence the gluten strength, but decreased flour mixing time and tolerance and hence the dough elasticity. Variation observed among genotypes suggests that grain end-use quality could be improved under high temperature conditions utilizing the available variability; however, it might require evaluation under various growing conditions.

show abstract

Phasic development of spring wheat and stability of yield and its components in hot environments

Cited by 25 publications

References 15 publications

Effect of Heat Stress on Grain Starch Content in Diploid, Tetraploid and Hexaploid Wheat Species

Effect of Heat Stress on Grain Starch Content in Diploid, Tetraploid and Hexaploid Wheat Species

Yield and Yield Components of Bread Wheat as Influenced by Water Stress, Sowing Date and Cultivar in Sokoto, Sudan Savannah, Nigeria

Genotypic and temperature effects on wheat grain yield and quality in a hot irrigated environment

Contact Info

Product

Resources

About