Genetic Diversity among Kenaf Mutants as Revealed by Qualitative and Quantitative Traits

ABSTRACT

Understanding the genetic variability using different qualitative and quantitative traits plays a significant role in kenaf breeding program. To achieve this objective, a study was conducted on yield and yield components over two planting seasons to evaluate genetic diversity and heritability among kenaf mutant lines using multivariate analysis to identify superior genotype for future breeding program. Highly significant differences (p ≤ 0.01) was recorded among the qualitative and quantitative traits. Strong to moderately positive phenotypic correlation was observed between dry fiber weights for all the morphological traits except top diameter and days to flowering. The 31 studied genotypes were grouped into six major clusters based on the UPGMA dendrogram. Principal component analysis based on the correlation matrix of 15 quantitative traits showed that the first five components accounted for 85.16% of the total variation of the genotypes. Based on diversity pattern and morphophysiological performance, hybridization of group IV with group VI, or group III, group V and group I could be used to attain high vigor or heterosis with a comparative photo-insensitive variety with high fiber yield. Also, this evaluation could be useful in developing reliable selection criteria for future improvement in kenaf breeding programs.

摘要

了解红麻不同品质和数量性状的遗传变异对红麻育种具有重要意义. 为实现这一目标, 对红麻两个栽培季节的产量和产量构成因素进行了研究, 利用多元分析法对红麻突变体系的遗传多样性和遗传力进行了评价, 以期为今后的育种工作提供优良的基因型. 品质性状和数量性状间差异极显著 (p≤.001). 除顶径和开花天数外, 所有形态性状的干纤维重均表现为强到中度正相关. 根据UPGMA树状图将所研究的31个基因型分为六大类. 基于15个数量性状相关矩阵的主成分分析表明, 前5个成分占基因型总变异的85.16%. 根据多样性格局和形态生理特性, 第四组与第六组或第三组, 第五组和第I组的杂交可以获得高纤维产量的光不敏感品种的高活力或杂种优势. 此外, 这项评估也有助于发展可靠的选择标准, 以供未来改良红麻育种计画.

KEYWORDS:

• Kenaf
• mutant
• genetic diversity
• heritability
• cluster analysis
• correlation

关键词:

• 红麻
• 变种人
• 遗传多样性
• 遗传力l
• 聚类分析
• 相关性

Conflicts of interest

The authors declared no potential conflicts of interest concerning the research, and/or publication of this article.

Additional information

Funding

This work was supported by the Bangladesh Agriculture Research Council, Ministry of Agriculture, Bangladesh [PIU-BARC, NATP-2], and Universiti Putra Malaysia under the research grant vote number 6282507.