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Acta Agron Sin ›› 2006, Vol. 32 ›› Issue (05): 785-786.

• RESEARCH NOTES • Previous Articles     Next Articles

Morphological and Cytological Characterizations of Trisomics, Double Trisomics and Double Tetrasomics in Brassica napus

HUA Yu-Wei; WANYAN Rui-Hong; XU Jing and LI Zai-Yun   

  1. National Key Laboratory of Crop Genetic Improvement, National Center of Oil Crop Improvement (Wuhan)，Wuhan 430070, Hubei，China
  • Received:2005-04-22 Revised:1900-01-01 Online:2006-05-12 Published:2006-05-12
  • Contact: LI Zai-Yun

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Abstract:

One plant (2n=42) was identified among the microspore—derived plants from one Brassica napus cv. Oro × Orychophragmus violaceus hybrid (2n=19~37), in which no O. violaceus chromosomes were detected, so the plant has only B. napus chromosomes. After Oro was pollinated with the pollen grains from the plant, progeny plants (2n=39, 40) were produced. Meiotic pairing configurations of the plants (2n=39, 40, 42) were mainly 19Ⅱ+1Ⅰ, 19Ⅱ+2Ⅰ and 21Ⅱ, and segregations at anaphase Ⅰ were 20∶19, 21∶19 and 21∶21, respectively. Thus the plants (2n=39, 40, 42) were trisomics, double trisomics and double tetrasomics of Brassica napus, respectively. Finally implications of these new aneuploids in rapeseed genetic researches were discussed.

Key words: Brassica napus, Trisomics, Double trisomics, Double tetrasomics, Genomic in situ hybridization

CLC Number: 

  • S565
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