芬查糖业甘蔗(Saccharum officinarum L.)基因型形态多样性及主成分分析

Q4 Biochemistry, Genetics and Molecular Biology Ratarstvo i Povrtarstvo Pub Date : 2022-01-01 DOI:10.5937/ratpov59-35862
S. Alemu, Tesfaw Fetene, Feyissa Tadesse
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引用次数: 0

摘要

本研究对芬查糖业22个外来甘蔗基因型的形态变异程度进行了评估,并将基因型聚类为相对均匀的类群,并对其总体多样性的主要性状进行了鉴定。实验设计采用RCBD,分为3个重复。对节间数、可磨茎数、株高、茎周长、单株重、甘蔗产量、糖度、果汁率、pol率、糖回收率和糖产量等数量性状进行了研究。方差分析结果表明,所有数量性状的基因型间均存在较高的表型和遗传多样性,可为甘蔗进一步改良提供参考。主成分分析结果表明,前3个基因型的变异量分别为43.12%、18.8%和13.71%,占总变异量的75.63%,其中汁品质性状对第1个主成分变异的负荷较大。聚类分析将基因型划分为5个不同的类别,其中第二类基因型最多(7个),第二类基因型最少(1个)。第一类共包含6个甘蔗基因型,占所调查材料的27.27%。第2簇占原料的31.82%,其特点是蔗长和单茎重较低。可采糖率与蔗长、可制茎数和糖产量的相关系数均为0 (r分别为0.02、0.02和0.01),表明这些性状有可能同时改良。
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Morphological diversity and principal component analysis of sugarcane (Saccharum officinarum L.) genotypes at Finchaa Sugar Estate
This study was conducted to assess the extent of morphological variation, cluster the genotypes into relatively homogenous groups and to identify the major characters contributing to the overall diversity of 22 exotic sugarcane genotypes at Finchaa Sugar Estate. The experimental design used was RCBD laid in three replications. Quantitative traits such as number of internodes, millable stalk, plant height, stalk girth, single cane weight, cane yield, brix percent juice, pol percent, sugar recovery percentage and sugar yield were investigated. ANOVA indicated the existence of high phenotypic and genetic diversity between genotypes for all quantitative traits studied which could be utilized for further sugarcane improvement. The principal component analysis for the genotypes exhibited variance of 43.12%, 18.8% and 13.71% for the first three categories and accounts about 75.63% of the total variation and the juice quality traits showed greater loading for the variation in the first principal component category. Cluster analysis grouped genotypes in to five distinct classes with maximum number of genotypes (7) in cluster II and minimum (1) in cluster V. In the first cluster six sugarcane genotypes were included this accounted 27.27% of the investigated materials which had been categorized by high cane length and single stalk weight. The second cluster which accounts 31.82% of the materials were characterized by lower cane length and single stalk weight. Recoverable sugar percent had almost zero correlation with cane length, millable stalk count and sugar yield (r= 0.02, 0.02 and-0.01 respectively) indicating the possibility of simultaneous improvement of these traits.
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来源期刊
Ratarstvo i Povrtarstvo
Ratarstvo i Povrtarstvo Agricultural and Biological Sciences-Soil Science
CiteScore
0.80
自引率
0.00%
发文量
4
审稿时长
4 weeks
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