关键词: 水稻, 川农优528, 机插母本, 异交习性, 相关分析, 通径分析

Abstract: [Objective] To detected the real relationship between the hybrid rice machine transplanting maternal outcrossing habits and seed production,and to provide the basis for the seed production mechanization technology in hybrid rice.[Method] We designed four kinds of treatment to product hybrid seed Chuannongyou 528:mechanized planting of female parents for rows 4,8,12 and with manual transplanting 8rows into control,while the male Parents manual transplanting 1row.And we analyzed the effect of different treatments on flowering time,when the flower stigma exsertion rate,seed setting rate and seed production.And the main factors affecting the yield of the correlation and path analysis were analyzed.[Results] The results showed that,mechanized planting of female parent have batter performance at effective panicles than manual transplanting to a total number of 4.665×10⁵-9.529×10⁵ ears/hm²,mechanized planting of female parent is better than manual transplanting parents in flower synchronization,but less at seed setting;pollen quantity and maternal seed setting rate represented significant positive correlation,r=0.793 2.Strong significant correlation was found between seed setting rate,spike number and grain yield (r=0.997^**,r=0.991);direct seed setting rate and spike number on yield coefficient is positive,but the seed setting rate by spike indirect effects on the yield and spike number through the seed setting rate of indirect effect on the seed yield was negative.[Conclusion] Compared with manual planting,Chuannongyou 528 machine transplanting performed lower in seed setting rate,and machine transplanting panicles 8row processing showed batter performance in seed-setting rate and seed production which was the suitable line number in transplanting.partial correlation coefficient can reflect the real association and properties of machine transplanting maternal seed setting rate and spike number and yield.Only take into account the spike number and seed setting rate can inserting machine improve the seed production mechanization female parent in seed production.

Key words: rice, Chuannongyou 528, transplanting the female parent, outcrossing habits, correlation analysis, path analysis