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Relationship between Heading and Flowering Stagesand Its Inheritance in Wheat

Zhou Gengjian(Laiyang Agricultural College, 265200)  
Both heading and flowering stages of wheat development could be considered as the maturing index. In-vestigation of homozygous parents showed that the coefficient of correlation between heading and noweringstages was 0.95l4** in the 1st year and 0. 9337** in the 2nd year, with little difference during the twoyears. Analysis according to R. M. Jones' method revealed that a and b1 of F1 were high significant at bothheading and flowering stages, but b2 was significant only at heading. Analysis by Hayman's method indlcatedthat F1's D was high significant, with H1、H2、h2 and F being significant or high significant. The average domi-nance (H1/D) of both stages was in partial dominance, 0. 347 and 0. 322 respectively, directing to the re-ducing effect. The narrow-sense heritability was 89. 77% at heading and 93. 75% at flowering.
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