期刊
PLANT BREEDING
卷 128, 期 1, 页码 36-40出版社
WILEY
DOI: 10.1111/j.1439-0523.2008.01542.x
关键词
bread wheat; Psathyrostachys huashanica; amphiploid; cytology; morphology; disease resistance
资金
- National Natural Science Foundation of China [30470135, 30670150]
- Changjiang Scholars and Innovative Research Teams in Universities of China [IRT0453]
- Education Bureau and Science and Technology Bureau of Sichuan Province
Wide crosses and synthetic amphiploids have played an important role in introgressing desirable traits from related species into cultivated wheat. Hybrids between Triticum aestivum cv. 'J-11' and Psathyrostachys huashanica were treated with colchicine, to produce a new intergeneric amphiploid (PHW-SA). The morphological characteristics of PHW-SA resembled the parent 'J-11'. PHW-SA plants have purple internodes and pubescence in the basal spikelet, inherited from the P. huashanica parent. Somatic chromosome numbers varied from 2n = 51 to 2n = 56, with 70.59% of plants having 56 chromosomes. At metaphase I, PHW-SA (2n = 56) plants showed an average of 1.15 univalents, 27.34 bivalents, 0.03 trivalents and 0.02 tetravalents per cell; complete chromosome pairing occurred in 50% of the pollen mother cells. A survey of disease resistances revealed that the stripe rust resistance from P. huashanica was expressed, but powdery mildew resistance was suppressed. The fertility of PHW-SA was 60%.
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