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.

Cold tolerance in rice varieties at different growth stages

2009 ◽  
Vol 60 (4) ◽  
pp. 328 ◽  
Author(s):  
C. Ye ◽  
S. Fukai ◽  
I. Godwin ◽  
R. Reinke ◽  
P. Snell ◽  
...  
Keyword(s):  
Low Temperature ◽  
Cold Tolerance ◽  
High Elevation ◽  
Temperature Tolerance ◽  
Seedling Stage ◽  
Growth Stages ◽  
Rice Varieties ◽  
Low Temperature Tolerance ◽  
Wide Range ◽  
Different Growth Stages

Low temperature is a common production constraint in rice cultivation in temperate zones and high-elevation environments, with the potential to affect growth and development from germination to grain filling. There is a wide range of genotype-based differences in cold tolerance among rice varieties, these differences often reflecting growth conditions in the place of origin, as well as breeding history. However, improving low temperature tolerance of varieties has been difficult, due to a lack of clarity of the genetic basis to low temperature tolerance for different growth stages of the rice plant. Seeds or plants of 17 rice varieties of different origins were exposed to low temperature during germination (15°C), seedling, booting, and flowering stages (18.5°C), to assess their cold tolerance at different growth stages. Low temperature at the germination stage reduced both the percentage and speed of germination. Varieties from China (B55, Banjiemang, and Lijianghegu) and Hungary (HSC55) were more tolerant of low temperature than other varieties. Most of the varieties showed moderate levels of low temperature tolerance during the seedling stage, the exceptions being some varieties from Australia (Pelde, YRL39, and YRM64) and Africa (WAB160 and WAB38), which were susceptible to low temperature at the seedling stage. Low temperature at booting and flowering stages reduced plant growth and caused a significant decline in spikelet fertility. Some varieties from China (B55, Bangjiemang, Lijiangheigu), Japan (Jyoudeki), the USA (M103, M104), and Australia (Quest) were tolerant or moderately tolerant, while the remaining varieties were susceptible or moderately susceptible to low temperature at booting and flowering stages. Three varieties from China (B55, Lijianghegu, Banjiemang) and one from Hungary (HSC55) showed consistent tolerance to low temperature at all growth stages. These varieties are potentially important gene donors for breeding and genetic studies. The cold tolerance of the 17 rice varieties assessed at different growth stages was correlated. Screening for cold tolerance during early growth stages can therefore potentially be an effective way for assessing cold tolerance in breeding programs.

scholarly journals Low-temperature Tolerance of Blackcurrant Flowers

HortScience ◽  
1999 ◽  
Vol 34 (5) ◽  
pp. 855-859 ◽  
Author(s):  
John Carter ◽  
Rex Brennan ◽  
Michael Wisniewski
Keyword(s):  
Low Temperature ◽  
Floral Development ◽  
Temperature Tolerance ◽  
Ice Nucleation ◽  
Genotypic Differences ◽  
Stem Tissue ◽  
Freezing Damage ◽  
Low Temperature Tolerance ◽  
Intact Plants ◽  
Two Stages

The low-temperature tolerance of flowers from three blackcurrant (Ribes nigrum L.) cultivars, `Brödtorp', `Ben Tirran', and `Baldwin', was determined at two stages of floral development. The three cultivars together represent a large part of the available genetic base for this subgenus of Ribes. Plants were maintained either at 4 °C in a growth cabinet under a 16-hour photoperiod or outdoors in Scotland during Spring 1997. Observed genotypic differences in survival were not associated with differences in LT50 of the flowers, and observations of freezing damage to flowers on intact plants suggest that the flowers can often survive by supercooling. This hypothesis is partly confirmed by the finding that detached flowers from all three cultivars have the capacity to supercool to at least –9 °C. Ice nucleation in stem tissue, however, was found to occur at or above –2 °C. That flowers on intact plants can apparently survive by supercooling, together with the finding that ice nucleation in stem tissue occurs at temperatures well above the LT50 of flowers, indicate the presence of barriers to propagation of ice from stem tissue to raceme. Such barriers within individual racemes are also indicated by patterns of freezing damage to flowers on intact plants cooled to –5 °C.

Identification of QTLs controlling low-temperature tolerance during the germination stage in cucumber (Cucumis sativusL.)

2018 ◽  
Vol 137 (4) ◽  
pp. 629-637 ◽  
Author(s):  
Zichao Song ◽  
Weiping Wang ◽  
Lixue Shi ◽  
Song Zhang ◽  
Qing Xie ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Tolerance ◽  
Low Temperature Tolerance ◽  
Germination Stage
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