QTL mapping of adventitious root formation under flooding conditions in tropical maize (Zea mays L.) seedlings

被引:48
作者
Mano, Y
Omori, F
Muraki, M
Takamizo, T
机构
[1] Natl Inst Livestock & Grassland Sci, Nasushiobara, Tochigi 3292793, Japan
[2] Natl Agr Res Ctr, Kyushu Okinawa Reg, Miyakonojo, Miyazaki 8850091, Japan
关键词
adventitious root; flooding; quantitative trait loci; tropical maize; waterlogging;
D O I
10.1270/jsbbs.55.343
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Quantitative trait loci (QTLs) controlling adventitious root formation (ARF) on the soil surface were evaluated under flooding conditions in I 10 individuals of an F-2 population derived from a cross between a dent inbred line 'B64' and a tropical Caribbean flint inbred line 'Na4'. The ARF capacity of seedlings suggested the existence of continuous variation in the F2 population. The QTLs for ARF were located on chromosomes 3 (bin 3.07-8), 7 (bin 7.04-5) and 8 (bin 8.05). Alleles of line Na4, with a high capacity for ARF, increased ARF in the case of all the QTLs. By comparing chromosome positions of ARF loci in the B64 x Na4 population with those in a B64 x teosinte (Zea mays ssp. huehuetenangensis) population, the region conditioning ARF on chromosome 8 was consistent across the two populations. In the present study, overlap between the QTLs for ARF in the B64 x Na4 cross and QTLs for root traits measured in aerated hydroponic culture was also observed as reported in other mapping populations.
引用
收藏
页码:343 / 347
页数:5
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