文献类型： 外文期刊

作者： Li, Pengfei ¹ ; Wu, Haiyan ¹ ; Guo, Shizhen ² ; Wang, Shunlin ¹ ; Zhang, Mimi ¹ ; Liu, Mengyang ³ ; Ma, Wei ³ ; Zhao, Jianjun ³ ; Tan, Chen ⁴ ; Cui, Cheng ⁵ ; Ge, Xianhong ² ; Li, Zaiyun ² ;

作者机构： 1.Guizhou Univ Tradit Chinese Med, Resource Inst Chinese & Ethn Mat Med, Guizhou Key Lab Germplasm Innovat & Resource Effic, Guiyang 550025, Peoples R China

2.Huazhong Agr Univ, Coll Plant Sci & Technol, Natl Ctr Oil Crop Improvement Wuhan, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Peoples R China

3.Hebei Agr Univ, Coll Hort, State Key Lab North China Crop Improvement & Regul, Key Lab Vegetable Germplasm Innovat & Utilizat Heb, Baoding 071001, Peoples R China

4.Gannan Normal Univ, Coll Life Sci, Ganzhou Key Lab Greenhouse Vegetable, Ganzhou 341000, Peoples R China

5.Sichuan Acad Agr Sci, Crop Res Inst, Chengdu 610066, Peoples R China

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：4.2； 五年影响因子：4.9 ）

ISSN： 0040-5752

年卷期： 2025 年 138 卷 6 期

页码：

收录情况： SCI

摘要： Key messageBrassica rapa-nigra monosomic alien addition lines (MAALs) were developed and compared with B. oleracea-nigra MAALs containing the same B-genome chromosomes.The diploid Brassica nigra (black mustard) is the donor of the B-genome for two allotetraploids: B. juncea (AABB) and B. carinata (BBCC). To dissect the B-genome of B. nigra within the A-genome background of B. rapa, the progenies of resynthesized B. juncea, successively pollinated by the parental B. rapa, were screened using cytological methods and molecular markers. Seven out of eight B. rapa-nigra MAALs (2n = 21, AA + 1B1-8) were obtained, except for the AA-B6 MAAL. The additional chromosome appeared as one univalent in 86.76% of pollen mother cells and formed one trivalent with two A-genome chromosomes in 13.24% of cells. Different alien B-genome chromosomes were transmitted to progeny at varying rates, with higher transmission rates via female gametes (averaging 13.59%) than via male gametes (7.31%). These MAALs exhibited significant phenotypic variations which were either of parental origins or novel traits, and chromosomal locations of some traits from B. nigra or genetic interactions were realized from the joint results of B. rapa-nigra and B. oleracea-nigra MAALs with the same additional B-subgenome chromosomes. Comparison analyses of these two sets of MAALs provided new insights into the genetic interplay of the B-genome with A- and C-genomes in these two allotetraploids.Key messageBrassica rapa-nigra monosomic alien addition lines (MAALs) were developed and compared with B. oleracea-nigra MAALs containing the same B-genome chromosomes.The diploid Brassica nigra (black mustard) is the donor of the B-genome for two allotetraploids: B. juncea (AABB) and B. carinata (BBCC). To dissect the B-genome of B. nigra within the A-genome background of B. rapa, the progenies of resynthesized B. juncea, successively pollinated by the parental B. rapa, were screened using cytological methods and molecular markers. Seven out of eight B. rapa-nigra MAALs (2n = 21, AA + 1B1-8) were obtained, except for the AA-B6 MAAL. The additional chromosome appeared as one univalent in 86.76% of pollen mother cells and formed one trivalent with two A-genome chromosomes in 13.24% of cells. Different alien B-genome chromosomes were transmitted to progeny at varying rates, with higher transmission rates via female gametes (averaging 13.59%) than via male gametes (7.31%). These MAALs exhibited significant phenotypic variations which were either of parental origins or novel traits, and chromosomal locations of some traits from B. nigra or genetic interactions were realized from the joint results of B. rapa-nigra and B. oleracea-nigra MAALs with the same additional B-subgenome chromosomes. Comparison analyses of these two sets of MAALs provided new insights into the genetic interplay of the B-genome with A- and C-genomes in these two allotetraploids.