Scientia Agricultura Sinica ›› 2004, Vol. 37 ›› Issue (09): 1352-1357 .doi: 10.3864/j.issn.0578-1752.040916

• HORTICULTURE • Previous Articles     Next Articles

Analysis of Chromosome Meiotic Behavior of F1 Hybrids and Its Backcross Generations Between Ogura-Type Male-SterileBrassica napus L. and B. campestris L.

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  1. 浙江大学蔬菜研究所
  • Received:2003-09-16 Revised:2004-02-16 Online:2004-09-20 Published:2004-09-20

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Abstract: F1 between female parent of Ogura male sterility Brassica napus L. (AACC，2n＝38) and male parents of B. campestris ssp. chinensis, B. campestris ssp. rapifera (AA, 2n＝20) was made, and BC1 and BC2 generations were produced. The number of somatic and gametic chromosomes of F1 hybrid were 29 and 19, respectively. In the strong growth plant of BC1, the chromosome configuration of Xinxuan1 and Naibing98-1was 10Ⅱ+9Ⅰ,the chromosome configuration of Aijiaohuang were mostly 10Ⅱ and 10Ⅱ+7Ⅰ. In the weak growth plant of BC1, the chromosome configuration of Xinxuan1 and Naibing98-1was 10Ⅱ+7Ⅰ, the chromosome configuration of Aijiaohuang was mostly 10Ⅱ+1Ⅰ. In the strong growth plant of BC2, the chromosome configurations of Xinxuan1 and Aijiaohuang were 10Ⅱ+1Ⅰand 10Ⅱ, respectively, the chromosome configuration of Aijiaohuang was mostly 10Ⅱ. In the weak growth plant of BC2, the chromosome configuration of Xinxuan1 and Aijiaohuang was 10Ⅱ, the chromosome configurations of Naibing98-1 were mostly 10Ⅱ+6Ⅰand 10Ⅱ+5. The chromosome number in Aijiaohuang and Xinxuan1 was 20. The percentage of cell with 2n=20 was 78.12%. Irregular segregation of chromosomes was observed of the BC1 plants during meiosis. These results suggested that the homologous of chromosomes between AACC and AA genome, and it is easy to obtain the CMS in B. compestris by several generations of backcross.

Key words: Ogura male sterility, Chinese cabbage, Brassica campestris, Turnip, Brassica rapa, Chromosome, Meiosis

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