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首页> 外文期刊>International Journal of Plant Breeding and Genetics >Genetic Variability in Snap Bean (Phaseolus vulgaris L.) Genotypes in Central Rift Valley of Ethiopia
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Genetic Variability in Snap Bean (Phaseolus vulgaris L.) Genotypes in Central Rift Valley of Ethiopia

机译：埃塞俄比亚中部裂谷的四季豆（菜豆）基因型的遗传变异

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Snap bean is an important crop in Ethiopia and its production has been steadily increasing. It occupies the highest share (94%) of export potential among all vegetables. Despite its importance, limited research effort was made to improve yield, pod quality to export market standard and tolerance to diseases. Thus, the present study was conducted to estimate the extent and pattern of genetic variability, heritability and genetic advance expected under selection to be used in the future breeding programs. Thirty six snap bean {Phaseolus vulgaris L.) genotypes were tested in 6x6 simple lattice designs at Melkassa Agricultural Research Center in 2010 in the off-season using furrow irrigation. Data on yield and yield contributing traits were collected. Significant difference among the genotypes for most of the characters was observed. High phenotypic coefficient of variation was recorded for green pod yield and other yield contributing traits. Similarly, green pod yield per plant depicted high genotypiccoefficient of variation while pod number per plant, single green pod weight and green pod width showed medium genotypic coefficient of variation. High to medium heritability coupled with high expected genetic advance as percent of mean was observed forgreen pod yield and pod number per plant indicating the opportunity to improve these characters through selection. Generally, the present study entails the presence of genetic variability among the test genotypes with respect to the traits under investigation. This implies the opportunity to bring about green pod yield improvements in snap bean either through direct selection or hybridization.
机译：四季豆是埃塞俄比亚的重要作物，其产量一直在稳定增长。在所有蔬菜中，它占出口潜力的最高份额（94％）。尽管其重要性，但为提高产量，豆荚质量（以出口市场标准）和对疾病的耐受性而进行的研究努力有限。因此，进行本研究以估计在选择中用于未来育种计划的遗传变异性，遗传性和遗传进展的程度和模式。在淡季使用犁沟灌溉，2010年在梅尔卡萨（Melkassa）农业研究中心以6x6简单点阵设计对36种七叶豆（Phaseolus vulgaris L.）基因型进行了测试。收集了有关产量和贡献性状的数据。观察到大多数字符的基因型之间存在显着差异。记录了高荚果产量和其他贡献产量性状的高表型变异系数。同样，每株植物的绿色荚果产量表现出高的基因型变异系数，而每株植物的荚果数量，单一的绿色荚果重量和绿色荚果宽度表现出中等的基因型变异系数。观察到高至中等的遗传力，以及较高的预期遗传进展，如平均荚果产量和单株荚果数均值所占百分比，表明有机会通过选择来改善这些性状。通常，本研究需要针对所研究的性状在测试基因型之间存在遗传变异。这意味着可以通过直接选择或杂交来提高四季豆的绿色荚果产量。

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