scholarly journals Expression partitioning of homeologs and tandem duplications contribute to salt tolerance in wheat (Triticum aestivum L.)

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Yumei Zhang ◽  
Zhenshan Liu ◽  
Abul Awlad Khan ◽  
Qi Lin ◽  
Yao Han ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Salt Tolerance ◽  
Triticum Aestivum L ◽  
Tandem Duplications

scholarly journals Chromatid and chromosome type breakage-fusion-bridge cycles in wheat (Triticum aestivum L.).

Genetics ◽  
1995 ◽  
Vol 140 (3) ◽  
pp. 1069-1085 ◽  
Author(s):  
A J Lukaszewski
Keyword(s):  
Triticum Aestivum ◽  
Ring Chromosome ◽  
Triticum Aestivum L ◽  
Aleurone Layer ◽  
Meiotic Pairing ◽  
Chromosome Type ◽  
Root Tips ◽  
Morphological Marker ◽  
Bfb Cycle ◽  
Tandem Duplications

Abstract During the development of disomic additions of rye (Secale cereale L.) chromosomes to wheat (Triticum aestivum L.), two reverse tandem duplications on wheat chromosomes 3D and 4A were isolated. By virtue of their meiotic pairing, the reverse tandem duplications initiated the chromatid type of the breakage-fusion-bridge (BFB) cycle. This BFB cycle continued through pollen mitoses and in the early endosperm divisions, but no clear evidence of its presence in embryo mitoses was found. The chromosome type of BFB cycle was initiated by fusion of two broken chromosome ends resulting in a dicentric or a ring chromosome. Chromosome type BFB cycles were detected in embryo mitoses and in root tips, but they did not persist until the next meiosis and were not transmitted to the progeny. Active BFB cycles induced breakage of other wheat chromosomes that resulted in additional reverse tandem duplications and dicentric and ring chromosomes. Four loci, on chromosome arms 2BS, 3DS, 4AL, and most likely on 7DL, were particularly susceptible to breakage. The BFB cycles produced high frequency of variegation for pigmentation of the aleurone layer of kernels and somatic chimeras for a morphological marker. With the exception of low mutation rate, the observed phenomena are consistent with the activity of a Ds-like element. However, it is not clear whether such an element, if indeed present, was of wheat or rye origin.

QTL mapping for salt tolerance associated traits in wheat (Triticum aestivum L.)

Euphytica ◽  
2019 ◽  
Vol 215 (12) ◽  
Author(s):  
Rajni Devi ◽  
Sewa Ram ◽  
Veenti Rana ◽  
Vipin Kumar Malik ◽  
Veena Pande ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Salt Tolerance ◽  
Qtl Mapping ◽  
Triticum Aestivum L
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