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Title 

Integrated analysis of leaf morphological and color traits in different populations of Chinese cabbage (Brassica rapa ssp. pekinensis)

Authors 

S R ChoiX YuV DhandapaniX LiZ WangS Y LeeS H OhW PangN RamchiaryC P HongS ParkZ PiaoHyeran KimY P Lim

Publisher 

Springer Verlag (Germany)

Issue Date 

2017

Citation 

Theoretical and Applied Genetics

Abstract 

Key message: QTLs and candidate gene markers associated with leaf morphological and color traits were identified in two immortalized populations ofBrassica rapa, which will provide genetic information for marker-assisted breeding. Abstract: Brassica rapa is an important leafy vegetable consumed worldwide and morphology is a key character for its breeding. To enhance genetic control, quantitative trait loci (QTLs) for leaf color and plant architecture were identified using two immortalized populations with replications of 2 and 4 years. Overall, 158 and 80 QTLs associated with 23 and 14 traits were detected in the DH and RIL populations, respectively. Among them, 23 common robust-QTLs belonging to 12 traits were detected in common loci over the replications. Through comparative analysis, five crucifer genetic blocks corresponding to morphology trait (R, J&U, F and E) and color trait (F, E) were identified in three major linkage groups (A2, A3 and A7). These might be key conserved genomic regions involved with the respective traits. Through synteny analysis with Arabidopsis, 64 candidate genes involved in chlorophyll biosynthesis, cell proliferation and elongation were co-localized within QTL intervals. Among them, SCO3, ABI3, FLU, HCF153, HEMB1, CAB3 were mapped within QTLs for leaf color; and CYCD3; 1, CYCB2; 4, AN3, ULT1 and ANT were co-localized in QTL regions for leaf size. These robust QTLs and their candidate genes provide useful information for further research into leaf architecture with crop breeding.

ISSN 

0040-5752

Link 

http://dx.doi.org/10.1007/s00122-017-2914-4

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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