“九二〇”和插植本数对籼型不育系广抗13A繁种的影响

研究"九二〇"和插植本数对广抗13A繁种的影响。结果表明:每穗总粒数、产量在不同插植本数间有显著或极显著差异;喷施"九二〇"剂量及时期对包颈度、包颈粒数、包颈粒率、每穗总粒数、穴有效穗、产量等特性均产生显著影响;插植本数与喷施"九二〇"剂量及时期共同影响广抗13A抽穗集中程度;广抗13A的繁种产量与穴有效穗、结实率呈极显著正相关,与包颈度、包颈粒数、包颈粒率呈极显著负相关;双本配以始穗期1 d喷施"九二〇"180 g/hm2、始穗期3 d喷施"九二〇"180 g/hm2、始穗期5 d喷施"九二〇"120 g/hm2和三本配以始穗期1 d喷施"九二〇"60 g/hm2、始穗期3 d喷施"九二〇"60 g/hm2、始穗期5 d喷施"九二〇"120 g/hm2处理的产量效果较好。

Effects of Gibberellin and Planting Number on the Seed Production of Guangkang13A, an Indica CMS Line

The article studied the effects of gibberellin and planting number on the seed production of Guangkang13A, an Indica CMS line. The results indicated that there were significant or highly significant differences of spikelets per panicle and breeding yield in different planting number; The gibberellin of spraying dose and period among panicle enclosure, package grain number, package grain rate, spikelets per panicle, effective panicles per hole, breeding yield had significant impact; The planting number together with gibberellin of spraying dose and period influenced heading concentration; There were highly significant positive correlation tends among breeding production and effective panicles per hole, seed-setting grate in Guangkang13A, while there were highly significant negative correlation tends among breeding yield and panicle enclosure, package grain number, package grain rate; The yield of processing effect was better on double planting numbers together with initial heading stage the first day per hectare spraying gibberellin 180 g, the third day per hectare spraying gibberellin 180 g, the fifth day per hectare spraying gibberellin 120 g and three plantingnumbers together with initial heading stage the first day per hectare spraying gibberellin 60 g, the third day per hectare spraying gibberellin 60 g, the fifth day per hectare spraying gibberellin 120 g.