TY  - JOUR
A1  - Tran, Quan Hong
A1  - Bui, Ngoc Hong
A1  - Kappel, Christian
A1  - Dau, Nga Thi Ngoc
A1  - Nguyen, Loan Thi
A1  - Tran, Thuy Thi
A1  - Khanh, Tran Dang
A1  - Trung, Khuat Huu
A1  - Lenhard, Michael
A1  - Vi, Son Lang
T1  - Mapping-by-sequencing via MutMap identifies a mutation in ZmCLE7 underlying fasciation in a newly developed EMS mutant population in an elite tropical maize inbred
JF  - Genes
N2  - Induced point mutations are important genetic resources for their ability to create hypo- and hypermorphic alleles that are useful for understanding gene functions and breeding. However, such mutant populations have only been developed for a few temperate maize varieties, mainly B73 and W22, yet no tropical maize inbred lines have been mutagenized and made available to the public to date. We developed a novel Ethyl Methanesulfonate (EMS) induced mutation resource in maize comprising 2050 independent M2 mutant families in the elite tropical maize inbred ML10. By phenotypic screening, we showed that this population is of comparable quality with other mutagenized populations in maize. To illustrate the usefulness of this population for gene discovery, we performed rapid mapping-by-sequencing to clone a fasciated-ear mutant and identify a causal promoter deletion in ZmCLE7 (CLE7). Our mapping procedure does not require crossing to an unrelated parent, thus is suitable for mapping subtle traits and ones affected by heterosis. This first EMS population in tropical maize is expected to be very useful for the maize research community. Also, the EMS mutagenesis and rapid mapping-by-sequencing pipeline described here illustrate the power of performing forward genetics in diverse maize germplasms of choice, which can lead to novel gene discovery due to divergent genetic backgrounds.
KW  - EMS
KW  - MutMap
KW  - mutagenesis
KW  - CLE7
KW  - tropical maize
KW  - fasciation
KW  - mapping
Y1  - 2020
U6  - https://doi.org/10.3390/genes11030281
SN  - 2073-4425
VL  - 11
IS  - 3
SP  - 1
EP  - 14
PB  - MDPI
CY  - Basel
ER  -