两系亚种间杂交稻结实生理调节的研究

两系亚种间杂交稻结实生理调节的研究庄宝华，林菲，洪植蕃（福建农学院，福州３５０００２）ＰｈｙｓｉｏｌｏｇｉｃａｌＲｅｇｕｌａｔｉｏｎｓｏｎＦｅｒｔｉｌｉｔｙｏｆＴｗｏ－ｌｉｎｅＩｎｔｅｒｓｕｂｓｐｅｃｉｅｓＲｉｃｅＨｙｂｒｉｄｓ￥ＺＨＵＡＮＧＢａｏｈ...

Physiological Regulations on Fertility of Two-line Intersubspecies Rice Hybrids

Two-line intersubspecies rice hybrids Yayou 2, Guangyou 6062 and Three-line hybrid rice Teyou 63 (Check) were used in the study, the results indicated that by the physiological regulations the relationships of Sink-source-flow in two-line intersubspecies rice hybrids could be obviously improved, resulting in increasing assimilate for grain filling, decreasing empty and blighted grains, and raising 1000--grain weight. The large effect was found on fertility by amelioration of their plant Space environment at the filling stage, while the potential of improving stem and sheath matter translocation to raise grain filling was smaller. Additionally, an inter-planting treatment show that higher fertility in the hybrids could be further expected by improving their pollination and fern tilization.