论文部分内容阅读
(三)棉花 1.花器构造:单生花,有花萼5个,联生,花瓣5个,雄蕊60-90枚,雌蕊1枚。雄蕊由花药和花丝组成,花丝基部联合成管状,称雄蕊管,与花冠基部联结并套在雌蕊外面(图5)。 2.开花习性常在早晨开花,花药在开花前后或与开花同时开裂,下午花冠逐渐变红、萎蔫,在开花当天的上午授以同一天上午刚开放的花的花粉,结实率最高。 3.杂交方法选花去雄:在下午3-4点钟以后,在母本株中选中部果枝上靠近主干的第1-2位花朵,其花冠已伸出苞叶,第二天就要开花的花苞,用姆指的指甲从花萼切入,轻轻剥去花冠和雄蕊管,用长约4厘米、一头带节或弯折的麦管(口径应大些),将柱头套住,直到子房上端,以便隔离授粉。在母本去雄的同时,也将第二天准备授粉的父本花朵选好,选与母本同天开放的花,用线扎住花冠,
(C) cotton 1. Flower structure: solitary flowers, with 5 calyx, associated students, petals 5, 60-90 stamens, 1 pistil. Stamens composed of anthers and filaments, filaments united into a tubular base, called the stamens, and corolla base and connected to the outside of the pistil (Figure 5). 2. flowering habits often flowering in the morning, anthers before and after flowering or with the cracking of flowers, afternoon corolla gradually red, wilting, in the morning of flowering the morning of the same day was granted pollen flowers, the highest seed setting rate. Hybridization method to elect flower to male: In 3-4 o’clock in the afternoon, in the mother plant selected middle branch on the trunk near the first 1-2 flowers, the corolla has extended his husk, the next day to flowering The calyx cut from the calyx with the thumb of the finger, gently stripped of the corolla and the stamen tube, with a length of about 4 cm, with a section or bent straw (diameter should be larger), stigma until the child The top of the room to isolate pollination. The male parent at the same time, but also the next day pollination to prepare the father of the flowers, choose the same day with the opening flower mother, tie the corolla thread,