Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (1): 17-22. doi: 10.7668/hbnxb.20193481

Special Issue: Corn Biotechnology Hot Article

• Crop Genetics & Breeding·Germplasm Resources·Biotechnology • Previous Articles     Next Articles

Gene Mapping and Genetic Analysis of Male Sterile Mutant x50 in Maize

GUO Yaoqing, SUN Xiaojing, LIAN Yujie, CHEN Hui, SUN Huayue, ZHANG Xuehai, TANG Jihua, CHEN Xiaoyang   

  1. College of Agronomy,Henan Agricultural University,Zhengzhou 450046,China
  • Received:2022-09-27 Published:2023-02-28

Abstract:

In order to explore the germplasm resources of male sterile line and identify the male fertility genes, which would provide the basic materials for the maize seed production by the male sterile line. Using the male sterile mutant x50 as the experimental material,the male sterile phenotype of x50 was studied,and the F1 and F2 populations of x50 and inbred line Mo17 were constructed to determine the genetic pattern of the male sterile trait in x50.With the F2 population,the male fertility gene X50 was identified by the map-based cloning.Furthermore,the candidate gene was confirmed by the allelism test.The results showed that compared with the wild type,the x50 anthers did not emerge from the glume,and was smaller and wilted,and no mature pollen grains were formed.All F1 plants were fertile,and F2 plants displayed 3∶1 segregation ratio between fertile and sterile plants,indicating that the monofactorial recessive inheritance of x50.The gene X50 was mapped to the interval from the molecular marker 2-4901 to 2-4963 on chromosome 2 with a physical range of 237.42 to 241.39 Mb by map-based cloning.Candidate gene analysis found that the male fertility gene ZmMs33 was located in the mapping region.In addition,the test crosses of the ms33 mutants(ms33-6029 and ms33-6052)and heterozygous +/x50 revealed 1∶1 segregation ratio between fertile and sterile plants.These results suggested that x50 was an allele mutant of ZmMs33 gene.The identification of the male sterile mutant x50 provided germplasm resources for maize hybrid seed production and functional study of ZmMs33 gene.

Key words: Maize, Male sterile gene X50, Gene mapping, Anther, Allelism test

Cite this article

GUO Yaoqing, SUN Xiaojing, LIAN Yujie, CHEN Hui, SUN Huayue, ZHANG Xuehai, TANG Jihua, CHEN Xiaoyang. Gene Mapping and Genetic Analysis of Male Sterile Mutant x50 in Maize[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(1): 17-22. doi: 10.7668/hbnxb.20193481.

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