珍汕97A是目前我国杂交水稻制种应用最广泛的亲本材料之一。由于对其需求量大,因此,在生产和供应过程中常常出现供过于求或求大于供的局面。为了既减少供需矛盾造成的经济损失,又保证一定的制种面积,一般采取就地冷藏和海南冬繁的办法。因此在生产上往往有陈种(隔年种)、正常种(上年种)和当年种(海南当年冬繁种)并存的情况.从而给杂交水稻制种播差安排及田间管理带来了困难。为了解各类种子的生 Zhenshan 97A is currently one of the most widely used parent materials for hybrid rice seed production in China. Due to the large demand for them, there is often oversupply or oversupply in the production and supply processes. In order to reduce the economic losses caused by the contradiction between supply and demand and ensure a certain area for seed production, the measures of on-site refrigeration and winter-fanning in Hainan are generally adopted. Therefore, there are often co-occurrences in the production (hybrid species), normal species (the former species) and the current species (Hainan year of winter species) coexist, thus giving hybrid rice sowing arrangements and field management has brought difficulties . To understand all kinds of seed students