玉米种子萌发阶段的吸水率研究

研究采用13个玉米杂交种及其相应的亲本自交系共32个基因型为材料,在人工控制条件下,研究种子萌发率达到60%以上时的吸水率.结果表明,不同基因型的吸水率差异很大,最低仅27.17%,最高达39.88%;一般情况下,自交系的吸水率高于杂交种的吸水率;杂交种及其相应亲本自交系的吸水率表现为多数杂交种低于双亲自交系,少数杂交种介于双亲自交系之间,1个杂交种比双亲自交系更高.双亲自交系吸水率高于相应杂交种的吸水率这一现象预示着种子萌发阶段吸水率的高低可能与基因型的抗旱性有关。

Study on the Rates of Sucking up Moisture with Maize Seeds During Their Germination

This study used 32 genotypes in maize(13 hybrids and 19 inbreds), and researched the rates of sucking up moisture with their seeds germinating rates above 60% during their germination, under artificial controlling. The result indicated that the difference of the rates of sucking up moisture among the different genotypes was very obvious, the lowest one was 27.17%, and the biggest one was 39.88%. In general, the rates of absorbing moisture with inbreds were higher than the ones of hybrids; the rates of absorbing moisture with most hybrids were lower than those of their parents; the rates of absorbing moisture with a few hybrids were between the ones of their parents; the rate of absorbing moisture with a hybrid only was higher than those of its parents. Appearance that the rates of absorbing moisture with parents were higher than the ones of their hybrids indicated the rates of absorbing moisture with maize seeds during their germination were possibly related to the drought resistance of genotype.