在正常水分和PEG6000胁迫处理条件下,对自交系黄早四和16份黄改系材料进行萌芽期耐旱性鉴定并筛选耐旱材料。结果表明：PEG溶液在浓度为-0.2Mpa(11.96%)即可进行干旱胁迫处理。萌发耐旱指数GDRI和贮藏物质干旱伤害率能够区分材料的耐旱性,GDRI与贮藏物质干旱伤害率呈显著负相关。GDRI与胚根长伤害率、胚芽干重伤害率和胚根干重伤害率呈显著负相关。中胚轴长度、籽粒鲜重和籽粒干重不受干旱胁迫的影响,不能作为耐旱性鉴定的性状,但可用于育种材料的筛选性状。根据PEG胁迫筛选,获得6份黄改系的萌芽期耐旱性材料。
英文摘要:
Under normal water condition and polyethylene glycol (PEG) simulating water stress condition, electing
and identificating drought tolerance of inbred Huangzaosi and 16 Huanggaixi(HGX) lines in the germination stage.
The results showed that drought stress was simulated when the concentration of PEG solution was -0.2Mpa
（11.96%）.The drought tolerance of lines was distinguished by GDRI and dry matter accumulation injuring rate.
There were significantly negative correlation between GDRI and dry matter accumulation injuring rate. There were
significantly negative correlation between GDRI and injuring rate of radicle length and dry weight of spout and
radical. Msocotyl length, kernel fresh weight and kernel dry weight couldn\&\#39\;t be identification traits of drought
tolerance because they couldn\&\#39\;t affect by drought tolerance, but they were breeding selection traits. Based on PEG
stress,9 HGX lines was identificated in the germination stage .
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