scholarly journals Mapping of QTLs Associated with Yield and Yield Related Traits in Durum Wheat (Triticum durum Desf.) Under Irrigated and Drought Conditions

2020 ◽  
Vol 21 (7) ◽  
pp. 2372 ◽  
Author(s):  
Mian Abdur Rehman Arif ◽  
Fauzia Attaria ◽  
Sajid Shokat ◽  
Saba Akram ◽  
Muhammad Qandeel Waheed ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Water Stress ◽  
Durum Wheat ◽  
Quantitative Trait ◽  
Triticum Durum ◽  
Agronomic Traits ◽  
Genetic Components ◽  
Drought Conditions ◽  
Yield Gain ◽  
Triticum Durum Desf

Global durum wheat consumption (Triticum durum Desf.) is ahead of its production. One reason for this is abiotic stress, e.g., drought. Breeding for resistance to drought is complicated by the lack of fast, reproducible screening techniques and the inability to routinely create defined and repeatable water stress conditions. Here, we report the first analysis of dissection of yield and yield-related traits in durum wheat in Pakistan, seeking to elucidate the genetic components of yield and agronomic traits. Analysis of several traits revealed a total of 221 (160 with logarithm of odds (LOD) > 2 ≤ 3 and 61 with LOD > 3) quantitative trait loci (QTLs) distributed on all fourteen durum wheat chromosomes, of which 109 (78 with LOD > 2 ≤ 3 and 31 with LOD > 3) were observed in 2016-17 (S1) and 112 (82 with LOD > 2 ≤ 3 and 30 with LOD > 3) were observed in 2017-18 (S2). Allelic profiles of yield QTLs on chromosome 2A and 7B indicate that allele A of Xgwm895 and allele B of Xbarc276 can enhance the Yd up to 6.16% in control and 5.27% under drought. Moreover, if combined, a yield gain of up to 11% would be possible.

Study of Genetic Architecture of Some Important Agronomic Traits in Durum Wheat (Triticum durum Desf.)

2003 ◽  
Vol 2 (9) ◽  
pp. 708-712 ◽  
Author(s):  
Muhammad Kashif . ◽  
Javed Ahmad . ◽  
Muhammad Aslam Chowd . ◽  
Khalida Perveen .
Keyword(s):  
Durum Wheat ◽  
Triticum Durum ◽  
Genetic Architecture ◽  
Agronomic Traits ◽  
Triticum Durum Desf

Mapping of QTL for agronomic traits and kernel characters in durum wheat (Triticum durum Desf.)

Euphytica ◽  
2012 ◽  
Vol 190 (1) ◽  
pp. 117-129 ◽  
Author(s):  
R. M. Patil ◽  
S. A. Tamhankar ◽  
M. D. Oak ◽  
A. L. Raut ◽  
B. K. Honrao ◽  
...  
Keyword(s):  
Durum Wheat ◽  
Triticum Durum ◽  
Agronomic Traits ◽  
Triticum Durum Desf

Physiological attributes associated with early-season drought resistance in spring durum wheat cultivars

1998 ◽  
Vol 78 (2) ◽  
pp. 227-237 ◽  
Author(s):  
R. El Hafid ◽  
Dan H. Smith ◽  
M. Karrou ◽  
K. Samir
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Durum Wheat ◽  
Drought Resistance ◽  
Triticum Durum ◽  
Dry Matter ◽  
Wheat Cultivars ◽  
Early Season ◽  
Physiological Attributes ◽  
Triticum Durum Desf

One of the common features of the Mediterranean climate in North Africa is the uncertainty of rainfall immediately after wheat (Triticum durum Desf) emerges. Relatively little work has been done to compare the drought resistance of spring durum wheat cultivars under early-season drought stress. There is a limited insight into the physiological basis of spring durum wheat drought resistance in rainfed Mediterranean regions. Field experiments were conducted in 1995 and 1996 growing seasons, and a greenhouse experiment was conducted in 1996 to examine differences in some physiological characters among six spring durum wheat cultivars in response to different durations of early-season drought, and rewatering; and to determine the relationships of these characters to drought resistance. Six spring durum wheat cultivars were evaluated under four water regimes. Water regime treatments were: a well-irrigated treatment; and three water deficit treatments imposed during the period from emergence through either the onset of tillering, mid-tillering or the end of tillering. Cultivars differed widely in their response to early season water stress. Under drought stress conditions, grain yield, aboveground dry matter yield, water use efficiency for the grain (WUEg) and for the total dry matter (WUEdm) were strongly positively associated with net CO2 uptake:transpiration ratio (A/E), and osmoregulation capacity. It is concluded that drought-induced changes in A, A/E, stomatal resistance, and osmotic adjustment are possible key control points in determining the drought-resistance of a cultivar. Furthermore, there is a substantial degree of intraspecific variation for the above mentioned physiological attributes to explore as a selection tool. Selection for high osmoregulation capacity and high A/E ratio would seem to be a justifiable means of improving total dry matter and grain yield under conditions of early-season water stress. Key words: Wheat, Triticum durum Desf., physiological attributes, early-season drought

scholarly journals Comparative study of proline accumulation of Some varieties of Durum Wheat (Triticum durum Desf.) under water Stress Conditions.

2016 ◽  
Vol 73 (2) ◽  
pp. 306 ◽  
Author(s):  
Yasmina Semiani ◽  
Marie Stella Bradea ◽  
Abdelkader Benbelkacem ◽  
Mohammed Semian
Keyword(s):  
Water Stress ◽  
Durum Wheat ◽  
Triticum Durum ◽  
Turgor Pressure ◽  
Proline Accumulation ◽  
Stress Conditions ◽  
Research Station ◽  
Abiotic Constraints ◽  
Triticum Durum Desf ◽  
Plot Design

Proline accumulation, as a marker of resistance to the abiotic constraints, was evaluated on seventeen genotypes of Durum wheat (Triticum Durum Desf) under water stress conditions. An experiment was implemented at INRAA research station located at Baraki, Algiers. The experimental design adopted is that of split plot design with water regime (irrigated and non irrigated treatments) as main plots and varieties as sub plots and three repetitions. Proline accumulation was significantly increased under water stress (p<0.01). There was differences between varieties and their interaction with water regimes (p<0.001) and 04 groups were identified. When plants are subjected to water stress they increase their rate of proline, this enables to improve the capacity of the cell to maintain it turgor pressure at low water potential. Key words: Durum wheat (Triticum durum Desf.), Proline accumulation, resistance, water stress.

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