The preliminary study of the genetic mechanism of recessive nuclear three-lines maintainer in Brasscia Napus L.

doi:10.14088/j.cnki.issn0439-8114.2020.10.004

Abstract

Abstract: The new nuclear three-lines maintainer Mian 7MB was revealed by Mianyang Academy of Agricultural Sciences in 1993. In the segregating population of selfing and sibling offspring, the proportion of fertility segregation did not conform to Mendelian genetic law, showing a partial segregation phenomenon. Through the field genetic analysis and cytological analysis, the genetic mechanism of Mian 7MB was preliminarily explored. The results showed that the segregation distortion in Mian 7MB only happened in the male gamete transference. Mian 7MB segregation was not due to abnormal meiosis, but may be due to the death of zygotes of some genotypes, resulting in abnormal proportion of offspring.

Key words: Brassica napus L., segregation distortion, male sterility, Mian 7MB

CLC Number:

S565.4

LIU Nian, MENG Da-qing, ZHU Jie, XU Kai, TANG Tian-ze, TU Jin-xing. The preliminary study of the genetic mechanism of recessive nuclear three-lines maintainer in Brasscia Napus L.[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(10): 19-22.

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The preliminary study of the genetic mechanism of recessive nuclear three-lines maintainer in Brasscia Napus L.

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