论文部分内容阅读
1 杂交水稻恢复存在的问题据我们调查,我地制种的几个主要恢复系:华联2号,测64—7、密阳46,晚3、桂33、明恢63等存在杂株率偏高的问题,杂株类型包括杂种F_1代、异品种、变异株等,特别是变异类型多。有的恢复系产生严格的熟期变异,出现各种早熟、迟熟类型;有的恢复系出现株叶形态变异、穗型变异、粒形变异、长芒变异;有的恢复系发生育性变异,自交结实率降低;有的恢复系恢复度降低,造成杂一代结实率降低。由于恢复系中混入其他杂株,在制种田中没有及时除去,花粉传入母本
1 Hybrid rice restore the existing problems According to our investigation, I planted several major restorer lines: Hualian 2, measured 64-7, Miryang 46, late 3, Gui 33, Minghui 63 and other existing strains The higher the type of hybrids, including F 1 hybrids, different varieties, variants, etc., especially the types of variation. Some restorers produced strict maturity variability and appeared various types of early maturity and late maturity. Some restorer lines showed morphological variation of plant leaves, variation of panicle type, variation of grain shape and variation of Changmang. Some restorer lines had fertility variation , The rate of selfing and seed setting decreased, while the recovery degree of some restorers decreased, resulting in the decrease of the seed set rate of hybrids. As the restoring system mixed with other hybrids, in the system of farming did not promptly removed, pollen into the mother