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1969年在美国的蒂夫顿和佐治亚得到由亲本Argentine和Early Runner正、反交杂种发展而来的许多F_2株系。这些株系都被用来进行早期世代产量测验的初步测验,试图通过早期世代的产量测验,选育出优良的花生品种。 高产的F_2株系连续进行了F_3、F_4、F_5和F_6代的产量测验。每代测验后,凡是产量不超过亲本的品系均被淘汰。在F_5和F_6代的产量测验中,根据种子的百粒重,将当选品系分为大荚和小荚类型分别进行产量测验。在F_5代测验中,安排了八个推广品种作为对照品种,在F_6代安排了五个对照品种。F_5和F_6代产量测验的产量和去壳率的资料采用统计学的分析予以估价。 在F_5代产量测验中,十二个品系中有九个品系产量超过双亲,其中有七个品系产量高于最好的对照。在F_6代产量测验中,五个品系中有三个品系,产量稍低于最好的对照品种;剩下的三个品系,产量都略低于亲本品种。根据这些结果可以看出,早期世代的产量测验,对子花生品种的评价和选择也许是一个可以接受的育种程序。
In 1969 in Tifton, the United States and Georgia to get from the parent Argentine and Early Runner positive and anti backcross hybrid development of many F_2 strains. These lines have been used to conduct preliminary tests of early generational yield tests, trying to breed good peanut varieties through early generations of yield tests. F_2, F_4, F_5 and F_6 generations of high yield F_2 lines were continuously tested. After each generation of test, all strains whose yield does not exceed their parents are eliminated. In the F_5 and F_6 generation yield tests, the selected strains were divided into large pods and small pods according to the 100-grain weight of the seeds for the yield test. In the F_5 generation test, eight popularized varieties were arranged as the control varieties, and five control varieties were arranged on the F_6 generation. Data on yield and dehulling rates of the F_5 and F_6 progeny were statistically analyzed. In the F5 progeny test, nine of the twelve lines produced more than their parents, seven of which had higher yields than the best controls. In the F_6 generation test, three of the five lines produced slightly lower yields than the best control; the remaining three lines produced slightly less than the parental line. Based on these results, it can be seen that the yield test of the early generation and the evaluation and selection of sub-peanut varieties may be an acceptable breeding program.