摘要
利用玉米自交系低植酸突变体及其野生型,通过田间试验与营养液培养试验研究了玉米低植酸突变体的主要生物学特性及光合速率。结果表明,与对应的野生型相比,突变体的播种-抽雄与播种-吐丝时间均有延长,叶面积变小,地上部与地下部生物量减少,根冠比提高,叶绿素计读数值SPAD降低,但净光合速率增加。同时,本文还针对玉米低植酸突变体的生物学特性,提出了低植酸玉米育种改良与利用的对策建议。
In this paper,the main biological characteristics and photosynthetic rate of low-phytic acid（LPA） maize mutant and its wildtype were compared through field experiment and nutrient solution culture experiment respectively.The results showed that,compared with wildtype,many changes had taken place in low phytic acid maize mutant.For example,the durations from seeding to tasselling and from seeding to silking were prolonged;the leaf area was diminished;the shoot and root dry matter weight were all reduced;root-shoot ratio was increased;chlorophyll SPAD value was reduced,however,the net photosynthetic rate was increased.Furthermore,the countermeasures and proposals about the breeding improvement using low-phytic acid maize were suggested according to the biological characteristics of low phytic acid maize mutant.
出处
《核农学报》
CAS
CSCD
北大核心
2010年第4期668-674,共7页
Journal of Nuclear Agricultural Sciences
基金
浙江省自然科学基金项目(Y305168)
关键词
玉米
低植酸突变体
生育期
根系
根冠比
净光合速率
maize
low phytic acid mutant
growth stage
root system
root-shoot ratio
net photosynthetic rate
