An in planta haploid induction system in Brassica napus. Issue 6 (14th June 2022)

• Record Type: Journal Article
• Authors: Li, Yifan; Li, Dan; Xiao, Qing; Wang, Huadong; Wen, Jing; Tu, Jinxing; Shen, Jinxiong; Fu, Tingdong; Yi, Bin
• Is Part Of: Journal of integrative plant biology. Volume 64:Issue 6(2022)
• Page Start: 1140
• Page End: 1144
• Publication Date: 2022-06-14
• Subjects: Brassica napus -- CRISPR/Cas9 -- fluorescence screening -- maternal haploid induction; Plants -- Periodicals; Plants -- China -- Periodicals; Electronic journals; 580.5
• DOI: 10.1111/jipb.13270
• Languages: English
• ISSNs: 1672-9072

Abstract

Summary: Doubled haploid technology is widely used to accelerate plant breeding, but its use in the important oilseed crop Brassica napus L. is limited because B. napus haploids could only be obtained through in vitro anther or microspore cultures. Recently, maize ( Zea mays ) lines containing mutations in Domain of unknown function 679 membrane protein ( DMP ) were used as haploid inducer lines. This new haploid induction mechanism has been extended to several other plants, including the dicots Arabidopsis thaliana, tomato ( Solanum lycopersicum ), and tobacco ( Nicotiana tabacum ). Here, we knocked out four BnaDMP genes in the B. napus cultivar Westar using a clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR‐associated protein 9 vector with an enhanced green fluorescent protein expression cassette. Plants with DMP mutations in B. napus in the T0, T1, and T2 generations exhibited a haploid induction rate up to 2.53%. These results suggest that targeting BnaDMP could be useful for haploid induction in B. napus . Abstract : Mutation of BnaDMP in Brassica napus produced haploid induction lines with significantly reduced in vitro germination rates. Haploid progeny of the female parent could be produced by crosses, and did not contain the genotype of the male parent.