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本试验采用两个高产矮秆春小麦(Tnticumaestiv um L)Anza和Bluebird—2的杂种随机F_3系谱,在田间两个区组相间种植。在每个F_3系谱中,从一个区组直观选取2—5个最优株,从另一区组中随机选择5株,以进行四种选择方法的研究。由F_3植株所产的种子和36个随机系谱(每个系谱具有三个随机系和两个直观选择系)分别在两处用大田播种量进行F_4代的田间试验。F_3代选择方法和F_4代产量的结果超过随机和直观选择的后代,随机F_4代平均产量的百分数分别表示如下:(1)以0.33选择强度进行的单株选择,超过4.21%;和4.73%(2)系谱内选择,即从每个系谱中选择的最优株,超产率为2.43%和2.87%;(3)以0.33选择强度进行系谱选择,超产率分别为1.01%和5.52%;(4)以0.33选择强度,对系谱和系谱内选择最优株相结合,超产3.56%和7.50%。试验结果指出:三级选择,即(1)植株的直观选择。(2)在直观选择植株平均产量的基础上进行系谱选择和(3)在选择的系谱内选出最优株,看起来是一种有效的而且容易应用的并值得进一步估价的方法。
In this study, hybrids of two high-yielding dwarf spring wheat (Tnticumaestivum L.) Anza and Bluebird-2 hybrid F_3 pedigree were planted in the field between two groups. In each F_3 pedigree, two to five optimal strains were visually selected from one block and five randomly selected from another block for the four selection methods. Seeds from F_3 plants and 36 randomized pedigrees (three pedigrees per lineage and two direct selection lines) were used in field trials with F4 generation at field seeding rates. F_3 generations and F_4 generations outnumbered randomly and directly selected offspring. The average percentages of random F_4 generations were expressed as follows: (1) Selection of plants at 0.33 selective strength, over 4.21%; and 4.73% ( (2) the pedigree selection, that is, the optimal strain selected from each pedigree, with overproduction rates of 2.43% and 2.87%; (3) pedigree selection with 0.33 selective intensities, with overfed rates of 1.01% and 5.52%; ) With a strength of 0.33, with the best-selected strains in the pedigree and pedigree combined with overproduction rates of 3.56% and 7.50%. The results of the experiment indicate that tertiary selection, namely (1) intuitive selection of plants. (2) pedigree selection based on an intuitive selection of plant average yield and (3) selection of the optimal strain within the selected pedigree appears to be a valid and easily applied method that deserves further valuation.