蠟質基因對於玉米子實容積重及砂耕幼苗生長勢之影響

Abstract

玉米蠟質基因之作用雖係改變胚乳內澱粉之組成，但亦會影響到子實之物理特性及幼苗之生長。爲明瞭蠟質基因之效應，本試驗乃以不同組合之非蠟質與蠟質子實測定其含水量及容積重。結果顯示非蠟質子實含水量較多，且其差異受親本遺傳背景所影響。如進行吸濕處理，非蠟質子實較易吸收水分，進行乾燥處理則以蠟質子實較易失去水分。至於兩種子實之容積重，經吸濕處理時無顯著差異，但乾燥處理後則以非蠟質子實之容積重較重。Waxy gene can affect the starch composition and physical characters of corn kernels as well as seedling vigour. In this experiment non-waxy and waxy kernels derived from different cross combinations were harvested for moisture content and bulk density determinations. The results showed that: Moisture content was higher in non-waxy kernels and in somecases closely associated with parental genetic background. The rate of water absorption of non-waxy kernels was higher than that of waxy kernels under treatment in saturated moisture condition. However, the waxy kernels lost water more easily than that of non-waxy kernels under drying treatment and the bulk density of non-waxy kernels was greater compared to waxy one.