摘要
In most maize-growing areas yield reductions due to drought have been observed (Frova et al., 1999; Li et al., 2003; Ribaut et al., 1997; Sari-Gorla et al., 1999). Seed germination and early seedling growth is the
In most maize-growing areas yield reductions due to drought have been observed （Frova et al., 1999; Li et al., 2003; Ribaut et al., 1997; Sari-Gorla et al., 1999）. Seed germination and early seedling growth is the primary stage for maize development. The ability of seeds to germinate rapidly and uniformly under water stress is desirable for maize production. In this study, a F9 RIL （recombinant inbred line） population was developed by crossing a drought-tolerant inbred line with a drought-susceptible one （Huangzaosi/Mol7）. Using this population, SSR linkage map was constructed with a total of 101 SSR markers covered 1 422.7 cM and average SSR marker density 15.6 cM. The map was in high consistence with published IBM map（www.maizedb.org）. QTLs analysis was conducted for germination drought tolerance index （GDTI） measured as germination index （GI） under water stress （WS）/GI under well watered（WW） condition using hydroponics method, and seedling drought tolerance index （SDTI） measured as water content of seedling under WS/water content of seedling under WW（Tuberosa et al.
出处
《分子植物育种》
CAS
CSCD
2007年第2期224-224,共1页
Molecular Plant Breeding
关键词
干旱
玉米
幼苗
发芽
Maize, SSR, QTL, Germination drought tolerance index, Seedling drought tolerance index
