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在1985和1986年收获的试验中,冬小麦品种及品系产生的61个F_1杂种的籽粒产量平均比高亲增加5.9％。1986年的试验中,430个杂种F_1的产量平均比高亲增加3.6％。在430个杂种的诸性状中,与低亲相比,产量的杂种优势最大。结果表明,多数品种的高产基因已经固定在高产品种中。上述杂种与亲本相比,单位面积的穗数虽然减少,但每穗粒数和粒重都比高亲增加。与其它的研究结果进行比较,对F_1杂种的产量优势做出了结论,到目前为止,在大不列颠和北爱尔兰联合王国(简称U.K.)农业生产上还没有一个完整的系统资料。
In the experiments harvested in 1985 and 1986, the average yield of 61 F1 hybrids produced by winter wheat varieties and lines increased by 5.9%. In the 1986 experiment, the average yield of 430 F1 hybrids increased by 3.6%. Among the traits of 430 hybrids, the heterosis of yield was the highest compared with the low progeny. The results showed that the high yielding genes of most varieties have been fixed in high yielding varieties. Compared with the parent hybrids, although the number of panicles per unit area decreased, but the grain number and grain weight per spike higher than pro. Comparing with other studies, we conclude on the yield advantages of F_1 hybrids, and so far, there is no complete systematic information on agricultural production in the United Kingdom of Great Britain and Northern Ireland (U.K.).