Rapid Identification of Candidate Genes for Seed Weight Using the SLAF-Seq Method in Brassica napus

PloS One
Xinxin GengWenhui Wei

Abstract

Seed weight is a critical and direct trait for oilseed crop seed yield. Understanding its genetic mechanism is of great importance for yield improvement in Brassica napus breeding. Two hundred and fifty doubled haploid lines derived by microspore culture were developed from a cross between a large-seed line G-42 and a small-seed line 7-9. According to the 1000-seed weight (TSW) data, the individual DNA of the heaviest 46 lines and the lightest 47 lines were respectively selected to establish two bulked DNA pools. A new high-throughput sequencing technology, Specific Locus Amplified Fragment Sequencing (SLAF-seq), was used to identify candidate genes of TSW in association analysis combined with bulked segregant analysis (BSA). A total of 1,933 high quality polymorphic SLAF markers were developed and 4 associated markers of TSW were procured. A hot region of ~0.58 Mb at nucleotides 25,401,885-25,985,931 on ChrA09 containing 91 candidate genes was identified as tightly associated with the TSW trait. From annotation information, four genes (GSBRNA2T00037136001, GSBRNA2T00037157001, GSBRNA2T00037129001 and GSBRNA2T00069389001) might be interesting candidate genes that are highly related to seed weight.

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Citations

Mar 27, 2019·G3 : Genes - Genomes - Genetics·Fei ShenZhenhai Han
Sep 24, 2018·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Hongbing SheZhaosheng Xu
Oct 17, 2016·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Namrata DhakaAkshay K Pradhan
May 16, 2017·Frontiers in Plant Science·Qinghong ZhouYingjin Huang

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Methods Mentioned

BETA
PCR
genotyping

Software Mentioned

BLAST
index
BLAF
Dual

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