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Chemicals or agents that can induce plant male sterility are considered chemical hybridizing agents (CHAs) and are quite useful for plant hybrid breeding. Tribenuron-methyl (TBM) can effectively induce male sterility in rapeseed plants. However, applications of TBM in rapeseed breeding practices have not been reported. Here, treatment with the CHA referred to as CHA-TBM, which contained 0.1–0.9 mg/L...
The wild species, Secale africanum Stapf., serves as a valuable germplasm resource for increasing the diversity of cultivated rye (Secale cereale L.) and providing novel genes for wheat improvement. The objective of this study was to identify new wheat-S. africanum chromosome 2Rafr derivatives by molecular markers and in situ hybridization, and to test the effects of centric translocations of S. africanum...
A new wheat-Thinopyrum substitution line AS1677, developed from a cross between wheat line ML-13 and wheat-Thinopyrum intermedium ssp. trichophorum partial amphiploid TE-3, was characterized by fluorescence in situ hybridization (FISH), sequential Giemsa-C banding, genomic in situ hybridization (GISH), seed storage protein electrophoresis, molecular marker analysis and disease resistance screening...
To better understand molecular evolution of the large α-gliadin gene family and provide a potential value for wheat quality improvement, total 32 α-gliadin gene sequences were isolated from the two Dasypyrum species, D. villosum. (L.) Candargy and D. breviaristatum (Lindb. F.) Frederisksen. Twelve of 32 sequences contained the in-frame stop condons were predicted to be pseudogenes, suggesting the...
Two amphiploids, AF-1(Triticum aestivum L. cv. Anyuepaideng–Secale africanum Stapf.) and BF-1 (T. turgidum ssp. carthlicum–S. africanum), were evaluated by chromosomal banding and in situ hybridization. The individual S. africanum chromosomes were identified in the BF-1 background by sequential C-banding and genomic in situ hybridization (GISH), and were distinguishable from those of S. cereale, because...
A genome specific DNA sequence that detects Secale africanum chromatin incorporated into wheat was developed in this study. Random amplified polymorphic DNA (RAPD) analysis was used to search for genome specific DNA sequences of S. africanum in lines, R111, “mianyang11” (MY11) and wheat-rye 1RS/1BL translocations R25 and R57. A high copy rye-specific DNA segment pSaD15940 of the S. africanum genome...
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