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首页> 外文期刊>The Kasetsart Journal >The Efficiency of Pedigree and Single Seed Descent Selections for Yield Improvement at Generation 4 (F_4) of Two Yardlong Bean Populations
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The Efficiency of Pedigree and Single Seed Descent Selections for Yield Improvement at Generation 4 (F_4) of Two Yardlong Bean Populations

机译：提高两个Yardlong Bean种群的第4代（F_4）产量的系谱和单种子后代选择的效率

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摘要

The efficiency of the selection procedure during succeeding generations is the most important role of any breeding program. There are many selection methods, but no method is perfect for general use with all crop plants. Breeders must carefully consider which method will be the most effective for their purposes. This study was conducted to compare the effectiveness between the pedigree selection (PS) and single seed descent (SSD) methods in two yardlong bean crosses. Both procedures started from the same F_2 population in each cross. In 2004, 15 F_4 progenies were selected by each selection method from each population. Thirty F_4 progenies and the parents of each population were tested in separate experiments with two check cultivars at the Songkhla Field Crop Research Station, Songkhla Province. Selected-PSU and VU135 were grown as check yardlong bean cultivars. Narrow sense heritability (h~2) for the pod yield and yield components were estimated through regression analysis of the F4 progenies on F3 parental plants. Correlations among yield and yield components were also estimated. The results showed that the mean pod yield and yield components of selected F_4 progenies derived from both PS and SSD were not significantly different in both the 4501 and 4502 populations. Low heritability for pod yield per plant was found in both the 4501 and 4502 populations at 4.62 and 2.96%, respectively, which indicated why selection for yield improvement in early generations had been ineffective. The highest positive correlation was found between the number of pods per plant and pod yield in both the 4501 and 4502 populations, with correlation coefficients of 0.7540 and 0.9229 (p<0.01), respectively. This study shows that PS and SSD are equally effective for yield improvement in yardlong bean.
机译：在后代中选择程序的效率是任何育种程序中最重要的角色。选择方法很多，但没有一种方法适合所有作物。育种者必须仔细考虑哪种方法对其目的最有效。本研究旨在比较两个码长的大豆杂交中的系谱选择（PS）方法和单种子后代（SSD）方法之间的有效性。两种方法均从每个杂交中相同的F_2种群开始。 2004年，通过每种选择方法从每个种群中选择了15个F_4后代。在宋卡府宋卡大田作物研究站，用两个检查品种在单独的实验中测试了30个F_4后代和每个种群的亲本。选择的-PSU和VU135用作检查码长豆品种。通过对F3亲本植物上F4后代的回归分析，估计了豆荚产量和产量成分的狭义遗传力（h〜2）。还估计了产量和产量成分之间的相关性。结果表明，在4501和4502种群中，从PS和SSD衍生的F_4子代的平均荚果产量和产量组成没有显着差异。在4501和4502种群中，发现单株荚果产量的遗传力较低，分别为4.62和2.96％，这说明了为什么在早期世代中提高产量的选择无效。在4501和4502种群中，每株豆荚的数量与豆荚的产量之间存在最高的正相关，相关系数分别为0.7540和0.9229（p <0.01）。这项研究表明PS和SSD对提高码子豆的产量同样有效。

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