Genetic Overlap of Drought-Tolerance Loci between Germination Stage and Seedling Stage Analyzed Using Introgression Lines in Soybean

2011 ◽  
Vol 37 (3) ◽  
pp. 477-483 ◽  
Author(s):  
Peng-Cheng QIU ◽  
Wen-Bo ZHANG ◽  
Can-Dong LI ◽  
Hong-Wei JIANG ◽  
Chun-Yan LIU ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Introgression Lines ◽  
Seedling Stage ◽  
Genetic Overlap ◽  
Germination Stage

Genetic overlap of QTL associated with low-temperature tolerance at germination and seedling stage using BILs in soybean

2012 ◽  
Vol 92 (7) ◽  
pp. 1381-1388 ◽  
Author(s):  
Wen-Bo Zhang ◽  
Hong-wei Jiang ◽  
Peng-Cheng Qiu ◽  
Chun-Yan Liu ◽  
Fei-Long Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Tolerance ◽  
Seedling Stage ◽  
Recurrent Parent ◽  
Phenotypic Data ◽  
Advanced Backcross ◽  
Low Temperature Tolerance ◽  
Genetic Overlap ◽  
Two Stages ◽  
Germination Stage

Zhang, W.-B., Jiang, H.-W., Qiu, P.-C., Liu, C.-Y., Chen, F.-L., Xin, D.-W., Li, C.-D., Hu, G.-H. and Chen, Q.-S. 2012. Genetic overlap of QTL associated with low-temperature tolerance at germination and seedling stage using BILs in soybean. Can. J. Plant Sci. 92: 1381–1388. Low temperature is one of the critical environmental factors that limit agricultural production worldwide. In northeast China soybean frequently suffers low temperature stress, especially at germination stage and seedling stage. The most effective way to solve this problem is to breed cultivars with low-temperature tolerance. A set of advanced backcross introgression lines was constructed with Hongfeng 11 as recurrent parent, which was a local variety in Heilongjiang province, and Harosoy as donor parent, which was introduced from Canada. Their BC2F4 lines were screened in low-temperature condition at the two stages, and 41 transgressive lines were selected out at germination stage and 45 lines at seedling stage. Sixty-four and fifty-one pairs of simple sequence repeat primers with fine polymorphism were used for genotyping the selected population and random population at the two stages, respectively. Related quantitative trait loci (QTL) were obtained by chi-test and ANOVA analysis with genotypic and phenotypic data. Finally, 25 QTL at germination stage and 13 QTL at seedling stage were mapped. Among them, 10 QTL overlapped between two stages, which showed a partial genetic crossover on low-temperature tolerance stages in soybean. This would play an important role in marker-assisted selection for breeding elite variety with low-temperature tolerance at both stages.

Evaluation of cassava germplasm (14 cultivars) for drought tolerance at seedling stage

2013 ◽  
Vol 38 (4) ◽  
pp. 366-372
Author(s):  
Xiao-qing WANG ◽  
Mao-chang TANG ◽  
Jie HUANG ◽  
Zi-fan LIU ◽  
Juan XU ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Seedling Stage

scholarly journals Screening for drought tolerance of maize hybrids by multi-scale analysis of root and shoot traits at the seedling stage

2016 ◽  
Vol 67 (8) ◽  
pp. 2453-2466 ◽  
Author(s):  
Viktoriya Avramova ◽  
Kerstin A. Nagel ◽  
Hamada AbdElgawad ◽  
Dolores Bustos ◽  
Magdeleen DuPlessis ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Seedling Stage ◽  
Scale Analysis ◽  
Maize Hybrids ◽  
Multi Scale ◽  
Root And Shoot Traits ◽  
Multi Scale Analysis

scholarly journals Affordable Phenotyping of Winter Wheat under Field and Controlled Conditions for Drought Tolerance

Agronomy ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 882
Author(s):  
Dhananjay Kumar ◽  
Sandeep Kushwaha ◽  
Chiara Delvento ◽  
Žilvinas Liatukas ◽  
Vivekanand Vivekanand ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Winter Wheat ◽  
Growth Rates ◽  
Plant Biomass ◽  
Growth Conditions ◽  
Seedling Stage ◽  
Growth Stages ◽  
Digital Cameras ◽  
Relative Growth ◽  
Relative Growth Rates

Drought stress is one of the key plant stresses reducing grain yield in cereal crops worldwide. Although it is not a breeding target in Northern Europe, the changing climate and the drought of 2018 have increased its significance in the region. A key challenge, therefore, is to identify novel germplasm with higher drought tolerance, a task that will require continuous characterization of a large number of genotypes. The aim of this work was to assess if phenotyping systems with low-cost consumer-grade digital cameras can be used to characterize germplasm for drought tolerance. To achieve this goal, we built a proximal phenotyping cart mounted with digital cameras and evaluated it by characterizing 142 winter wheat genotypes for drought tolerance under field conditions. The same genotypes were additionally characterized for seedling stage traits by imaging under controlled growth conditions. The analysis revealed that under field conditions, plant biomass, relative growth rates, and Normalized Difference Vegetation Index (NDVI) from different growth stages estimated by imaging were significantly correlated to drought tolerance. Under controlled growth conditions, root count at the seedling stage evaluated by imaging was significantly correlated to adult plant drought tolerance observed in the field. Random forest models were trained by integrating measurements from field and controlled conditions and revealed that plant biomass and relative growth rates at key plant growth stages are important predictors of drought tolerance. Thus, based on the results, it can be concluded that the consumer-grade cameras can be key components of affordable automated phenotyping systems to accelerate pre-breeding for drought tolerance.

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