论文部分内容阅读
野败“三系”杂种具有特殊而丰富的遗传基础,能否通过花药培养得到稳定而丰富的遗传重组类型,达到纯合选优的目的,这是育种工作者极为关心的问题。我所几年来,采用禾谷类通用培养基,结合低温和离心预处理,使籼型杂交水稻花粉绿苗的锈导频率由最初的0.36％提高到1.7％。在此基础上开展了有关花粉植株的性状遗传及其育种研究。通过对654个野败型“三系”杂种花粉株系(H_2)的调查,其中性状稳定的株系占89％,表明绝大多数花粉株系的性状遗传是稳定的。通过对不同株系间对比分析,各主要经济性状的变异系数和极差,明显大于双亲,且一般超过F_1代,其生育期、
It is a matter of great concern to breeders that the wild-type “three lines” hybrids have a special and rich genetic basis and whether stable and abundant genetic recombination types can be obtained through anther culture to achieve homozygosity and optimization. In recent years, with the application of cereal universal medium combined with low temperature and centrifugal pretreatment, the frequency of rust conduction of the indica hybrid rice pollen green seedlings increased from 0.36% to 1.7% in the past few years. On this basis, the inheritance and breeding of pollen plants were studied. A survey of 654 wild type “three lines” hybrid pollen lines (H 2) showed that 89% of them were stable, indicating that the traits of most pollen lines are genetically stable. Through the comparative analysis of different strains, the coefficient of variation and range of major economic traits were significantly larger than that of parents, and generally exceeded that of F1 generation. The growth period,