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Stock6 parthenogenesis induction system found in corn. By importing a different marking system has bred stock6 (CI) and stock6 (BPIR-nj) two types, they are all current parthenogenesis Inducer original ancestors. Based induction stock6 bred lines the SW14 (Lashems, 1988), ZMS (Chalyk, 1994), Krasnodar Markers (Shatskaya etc., 1994), they induced the Department of haploid induction rate of 3% or more. In this study, of the 11 different Inducer stock6 and four different types of 12 maize materials (including the super sweet corn, Pu sweet corn, waxy corn, normal corn) NC Ⅱ design of various combinations of parthenogenesis as the research object haploid induction rate determined female parent genotype and paternal genotype parthenogenesis haploid induction rate; over a test results based induction system, filter out the higher induction rate outstanding performance in hybrid (combined) on trial in Sichuan and Southwest in 2005, the pre-trial hybridization induced, resulting haploid different ways to different concentrations of chemical doubling using colchicine, to explore the corn haplotype body doubling technology. The results will now be summarized as follows: 1. The female parent material of different types of corn haploid induction rates there are significant differences in the different maternal genes have a big impact on the type of induction rate. stock6 average induction rate was 0.9258%, very close to the results with the previous 0.91%. The individual induction rate could reach 4.34% can be seen from the table. Super sweet corn, Pu sweet corn, waxy corn and normal corn average induction rate: 1.4997%, 0.5379%, 1.2485% and 0.4169%, respectively. 2. Of containing different stock6 Inducer between induction rate exist significant differences, and that to containing stock6 different strains affect haploid induction rate. Liu Zhi Zeng SONG Tong Ming (1998) showed that the genotypes of the parents of the haploid induction rate affect the results of this study and their consistent. Lashems (1998), Chalyk (1994) and Shatskaya (1994) Based on the the Inducer bred by stock6 SW14, ZMS and Krasnodar Markers, the Inducer induction rate of more than 3%, indicating that the induction rate can be improved through breeding and . In this experiment, the the Inducer stock6 the percentage change in the average induction rate of 0.61-1.55%, need to be further improved. Soaking and growing point injection treatment, seeds, shoots and young roots are able to achieve the effect of chromosome doubling, but considering factors such as mortality, shedding rate, the results indicate that colchicine with 0.4% in the six-leaf stage injection plant, doubling effect is best.
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