两系法籼粳亚种间杂交稻产量因素与产量关系的研究  

STUDIES ON THE RELATIONSHIP BETWEEN YI ELD CHARACTERS AND GRAIN WEIGHT PER PLANT OF TWO LINE INTERSUBSPECIFIC HYBRIDS OF RICE (ORYZA SATIVA L.)

作　　者：刘建丰[1] 康春林[1] 伏军[1] 

机构地区：[1]湖南农业大学水稻科学研究所

出　　处：《湖南农业大学学报（自然科学版）》1997年第5期406-410,共5页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：湖南省科委资助

摘　　要：为了选育产量因素高度协调的籼粳亚种间杂交稻，有必要对其穗粒结构进行理论分析．通过对２４个两系法籼粳亚种间组合的产量因素与产量的遗传相关分析，得出以下结论：亚种间杂交稻单株粒重显著高于品种间杂交稻，２４个组合中有６个组合与汕优６３比有正向竞争优势；产量因素中，每穗总颖花数、每穗实粒数和千粒重与单株粒重的遗传相关系数为正值并达显著水平．通径分析结果表明，对单株粒重的影响大小依次为每穗实粒数、千粒重、单株穗数、充实系数、结实率和每穗总颖花数；On the basis of wide compatibility between Indica and Japonica subspecies,24 intersubspecific hybrids were produced using the two line system. The relationships between yield components and grain weight per plant (GWPP) of these hybrids were studied in 1992. The results showed that:(1) GWPP of the intersubspecific hybrids was greater than that of the intervarietal hybrids significantly at the level of 5%;(2) Spikelets per panicle (SPP),filled spikelets per panicle (FSPP) and 1 000 grain weight out of the yield charaters were positively correlated with GWPP in the intersubspecific hybrids;(3) FSPP,1 000 grain weight,panicle per plant,grain filling coeffecient,seed set and SSP had the effect on GWPP in the decreasing order in the intersubspecific hybrids.

关 键 词：水稻 产量 亚种间杂交 产量构成因素 两系法 

分 类 号：S511.035.1[农业科学—作物学]