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Construction of an anchoring SSR marker genetic linkage map and detection of a sex-linked region in two dioecious populations of red bayberry

文献类型： 外文期刊

作者： Wang, Yan 1 ; Jia, Hui-Min 2 ; Shen, Yu-Tong 1 ; Zhao, Hai-Bo 1 ; Yang, Qin-Song 1 ; Zhu, Chang-Qing 1 ; Sun, De-Li 1 ; W 1 ;

作者机构： 1.Zhejiang Univ, Fruit Sci Inst, Coll Agr & Biotechnol, Hangzhou 310058, Peoples R China

2.Chinese Acad Sci, Shanghai Ctr Plant Stress Biol, CAS Ctr Excellence Mol Plant Sci, Shanghai 201602, Peoples R China

3.Yuyao Forestry Technol Extens Ctr, Ningbo 315400, Peoples R China

4.Ningbo Acad Agr Sci, Inst Forestry, Ningbo, Peoples R China

5.Cixi Forestry Technol Extens Ctr, Cixi 315300, Peoples R China

6.Linhai Forestry Technol Extens Ctr, Taizhou 317000, Peoples R China

7.Shanghai Acad Agr Sci, Forest & Fruit Tree Inst, Shanghai 201403, Peoples R China

期刊名称：HORTICULTURE RESEARCH （ 影响因子：6.793； 五年影响因子：6.589 ）

ISSN： 2662-6810

年卷期： 2020 年 7 卷 1 期

页码：

收录情况： SCI

摘要： Red bayberry (Morella rubra) is an evergreen fruit tree found in southern China whose whole-genome sequence has recently been published. We updated the linkage map of the species by adding 118 SSR markers and the female-specific marker MrFT2_BD-SEX. The integrated map included eight linkage groups and spanned 491 cM. Eleven sex-associated markers were identified, six of which were located in linkage group 8, in agreement with the previously reported location of the sex-determining region. The MrFT2_BD-SEX marker was genotyped in 203 cultivated accessions. Among the females of the accessions, we found two female-specific alleles, designated W-b (151 bp) and W-d (129 bp). We previously found that 'Dongkui', a female cultivar, could produce viable pollen (we refer to such plants 'Dongkui-male') and serve as the paternal parent in crosses. The genotypes of the MrFT2_BD-SEX marker were W-b/Z in 'Biqi' and W-d/Z in 'Dongkui-male'. The progeny of a cross between these parents produced a 3:1 female (W-) to male (ZZ) ratio and the expected 1:1:1:1 ratio of W-b/W-d: W-b/Z: W-d/Z: Z/Z. In addition, the flowering and fruiting phenotypes of all the F1 progeny fit their genotypes. Our results confirm the existence of ZW sex determination and show that the female phenotype is controlled by a single dominant locus (W) in a small genomic region (59 kb and less than 3.3 cM). Furthermore, we have produced a homozygous "super female" (WW) that should produce all-female offspring in the F2 generation, providing a foundation for commercial use and presenting great potential for use in modern breeding programs.

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