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首页> 外文期刊>American Journal of Experimental Agriculture >Phenotypic Diversity of Selected Dual Purpose Forage and Grain Sorghum Genotypes
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Phenotypic Diversity of Selected Dual Purpose Forage and Grain Sorghum Genotypes

机译：选定的两用饲料和谷物高粱基因型的表型多样性

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Aims: To study the phenotypic diversity of 25 forage and 45 grain sorghum genotypes for dual purpose as food and feed and to identify traits that might contribute to genetic improvement. Study Design: A 7 × 10 alpha lattice design was used with two replications at two sites. Place and Duration of Study: The study was conducted at Makerere University Agricultural Research Institute Kabanyolo (MUARIK) and National Semi Arid Resources Research Institute (NaSARRI) in Uganda between September to December, 2013 (Season 1) and April to July 2014 (season 2). Methodology: Morphological and agronomic data were taken for each genotype from each environment in the two seasons and subjected to combined analysis of variance separately for the grain and forage sorghums. Multivariate analysis was done based on principle component and cluster analyses in which grain and forage sorghum genotypes were combined. Results: Analysis of variance revealed significant differences ( P < 0.001 ) among the genotypes for biomass, grain yield, plant height and days to flowering indicating the possibilities of improving these characters through phenotypic selection. Cluster analysis grouped the genotypes into 3 clusters with cluster 1 retaining majority of the forage genotypes characterised with high biomass, Cluster 2 containing a mixture of the forage and grain sorghums characterised with high grain yield while cluster 3 contained only the grain sorghums. The first four principle components explained 89% of the total variations observed in the genotypes. Conclusion: Based on the performance of genotypes in this study, simultaneous selection of genotypes exhibiting moderate to high levels of grain and fodder traits resulted in twelve genotypes being selected as parents for the development of dual purpose sorghum cultivars.
机译：目的：研究作为饲料和饲料双重用途的25种草料和45种谷物高粱基因型的表型多样性，并确定可能有助于遗传改良的性状。研究设计：使用7×10 alpha晶格设计，在两个位置进行两次复制。研究的地点和时间：该研究于2013年9月至12月（第1季）和2014年4月至2014年7月（第2季）在乌干达的马卡雷雷大学农业研究所Kabanyolo（MUARIK）和国家半干旱资源研究所（NaSARRI）进行。 ）。方法：在两个季节中从每种环境中获取每种基因型的形态学和农艺学数据，并分别对谷物和牧草高粱进行方差组合分析。基于主成分和聚类分析的多变量分析将谷物和饲料高粱的基因型结合在一起。结果：方差分析显示，生物量，谷物产量，植物高度和开花天数的基因型之间存在显着差异（P <0.001），表明通过表型选择可以改善这些性状。聚类分析将基因型分为3个聚类，聚类1保留了具有高生物量特征的大部分饲草基因型，聚类2包含了具有高谷物产量的牧草和谷物高粱的混合物，聚类3仅包含谷物高粱。前四个主要成分解释了基因型中观察到的总变异的89％。结论：根据本研究的基因型表现，同时选择具有中等至高水平谷物和饲料性状的基因型导致选择了12个基因型作为双用途高粱品种发展的亲本。

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