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测定了5个杂交组合F_2各单株(各组合测118—303株)的单叶净光合率(P_N),均呈常态分布。F_2中约有5—23％的个体超过亲本P_N的平均值,并出现1—2％的超高亲最高值的单株。测定了2个组合F_3各株系的平均P_N,有10％的株系超过了高P_N亲本的平均值。用亲于回归法对F_3/F_2及F_4/F_3的材料进行P_N的狭义遗传力估算。F_4/F_3比F_2/F_2明显提高。用不同材料不同方法估算广义遗传力有所不同,估算值范围为47—90％。对已育成品种“广陆矮”、“珍珠矮”、“红410”及其亲本的P_N进行了分析。经两年重复测定的结果,不同P_N的亲本杂交后,其后代为中间型,或是超亲的,表明通过有性杂交,至少可以得到超过低P_N亲本的后代,甚至也会出现超亲的。在高光效品种的杂交后代F_4中,从近7000个单株中选择了100个株型良好、生势旺盛的单株,测定了其剑叶的P_N,结果有37％超过高P_N亲本的平均值。初步表明高光效和优良株型是可以结合在一起的。
The net photosynthetic rate (P_N) of single leaf of five hybrid combinations F 2 (118-303 lines in each combination) was determined, which showed the normal distribution. Approximately 5-23% of individuals in F_2 exceeded the average of their parents P_N and developed 1-2% of their super high progenitors. The average P_N of the two combinations of F_3 lines was determined, and 10% of the lines exceeded the average of the high P_N parents. The progeny of the regression method for the F_3 / F_2 and F_4 / F_3 material P_N narrow sense of heritability estimates. F_4 / F_3 was significantly higher than F_2 / F_2. The estimates of generalized heritability using different methods of different materials vary, with estimates in the 47-90% range. The P_N of cultivars “Guanglu short”, “Pear short”, “red 410” and their parents were analyzed. After two years of repeated measurements, the parents of different P_N hybrids were either intermediate or super-progeny, indicating that at least more offspring than low P_N parents can be obtained by sexual crossing, and even super-progeny . In the hybrid progenies F_4 with high photoperiod efficiency, 100 plants with good plant vigor and vigorous vigor were selected from nearly 7,000 individuals. The P_N of flag leaf was determined and 37% of them were higher than the average of high P_N parents value. Preliminary indications of high luminous efficiency and excellent plant type can be combined together.