Plant Breeding for Stress Environments

Blum, A.

doi:10.1201/9781351075718

Cited by 368 publications

(202 citation statements)

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“…Roots exhibit morphological plasticity in response to soil physical conditions (Bengough et al, 2006;Forde, 2009;Tuberosa, 2012), a uniqueness that allows plants to adapt better to the chemical and physical properties of the soil, particularly under drought conditions (Bacon et al, 2002;Yu et al, 2007). Specific root traits associated with maintaining plant productivity under drought conditions include increases in numbers of roots with smaller diameters and a deeper root system (Blum, 1988(Blum, , 2011Addington et al, 2006;Pemán et al, 2006;Chirino et al, 2008;Comas et al, 2013). A correlation between a deep and prolific root system with drought resistance has been established in several crops including soybeans (Sadok and Sinclair, 2011), chickpea (Cicer arietinum L.) (Varshney et al, 2011), maize (Tuberosa et al, 2003(Tuberosa et al, , 2011Landi et al, 2010;Hund et al, 2011), and wheat (Triticum aestivum L.) (Wasson et al, 2012).…”

Section: Bacterial-mediated Drought Tolerancementioning

confidence: 98%

Bacterial-mediated drought tolerance: Current and future prospects

Ngumbi

Kloepper

2016

Applied Soil Ecology

376

211

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Section: Bacterial-mediated Drought Tolerancementioning

confidence: 98%

Bacterial-mediated drought tolerance: Current and future prospects

Ngumbi

Kloepper

2016

Applied Soil Ecology

376

211

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“…Canopy temperature gives an indication of the interaction between the canopy of the plant and the external environment. Canopies may be cooler than the environment because they transfer relatively more heat back to the atmosphere by reflection and convection (Blum 1988). A number of studies have shown that wheat cultivars with low CT showed a trend of higher yield under heat stress (Bahar et al 2008;Balota et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Transfer and mapping of the heat tolerance component traits of Aegilops speltoides in tetraploid wheat Triticum durum

et al. 2016

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Aegilops speltoides is an important genetic resource for wheat improvement and has high levels of heat tolerance. A heat-tolerant accession of Ae. speltoides pau3809 was crossed with Triticum durum cv. PDW274, and BC 2 F 4-6 backcross introgression lines (BILs) were developed, phenotyped for important physiological traits, genotyped using SSR markers and used for mapping the QTL governing heat tolerance component traits. A set of 90 BILs was selected from preliminary evaluation of a broader set of 262 BILs under heat stress. Phenotyping was conducted for physiological traits such as cell membrane thermostability, chlorophyll content, acquired thermotolerance, canopy temperature and stay green. Much variation for these traits was observed in random as well as selected sets of BILs, and comparison of the BILs with the recurrent parent showed improvement for these traits under normal as well as heat stress conditions, indicating that introgressions from Ae. speltoides might have led to the improvement in the heat tolerance potential of the BILs. Introgression profiling of the 90 BILs using SSR markers identified Ae. speltoides introgression on all the 14 chromosomes with introgressions observed on A as well as B genome chromosomes. QTL mapping identified loci for various heat tolerance component traits on chromosomes 2B, 3A, 3B, 5A, 5B and 7A at significant LOD scores and with phenotypic contributions varying from 11.1 to 28.7 % for different traits. The heattolerant BILs and QTL reported in the present study form a potential resource that can be used for wheat germplasm enhancement for heat stress tolerance.

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“…Physiological assays have also revealed variations specific to acquired thermotolerance among cultivars of barley (Maestri et al, 2002), potato (Ahn et al, 2004), rice (Gesch et al, 2003), pearl millet and sorghum (Howarth et al, 1997), but follow-up quantitative genetic analysis of this variation has not been reported. Thus, there is little consensus on the numbers or types of genes that may be responsible for different heat tolerance traits (Marshall, 1982;Blum, 1988;Hall, 1990Hall, , 2001. The difficulties in breeding for heat tolerance have also limited genetic analysis in this area.…”

Section: Kinases and Phosphatasesmentioning

confidence: 99%

“…To gain a full appreciation of heat stress in the context of the whole plant and its physiological processes readers are encouraged to consult excellent older literature, including Turner and Kramer (1980), Raper and Kramer (1983), Patterson and Graham (1987), Blum (1988), Weis and Berry (1988), Hall (1990) and Nobel (1991). While understanding the cellular response is daunting enough, integrating our knowledge into an understanding of stress effects on the agricultural productivity and evolutionary fitness of plants is the ultimate challenge.…”

mentioning

confidence: 99%