Genotypic Variability, Correlation and Path Analysis among Yield Components in Kenaf Mutants under Tropical Conditions

ABSTRACT

Correlation and path coefficient analysis aid in developing breeding strategies aimed at increasing yield traits through selection by providing a better understanding of the relationship. This study was conducted on yield and yield-related traits to determine their direct and indirect effects among thirty-one kenaf mutant lines to identify selection criteria for higher fiber yield. The analysis of variance showed significant differences for all the characters studied except for top diameter, where non-significant differences were observed for genotype and genotype by season interaction. The dry fiber weight significantly correlated with seven traits at the phenotypic and genotypic levels. Hence, selection based on these traits is effective for increasing kenaf fiber yield. Path coefficient analysis revealed that fresh stem weight without leaves and pod (0.223) had the maximum contribution to fiber yield per plant, followed by plant height (0.202). Fresh stem weight without leaves and pod (0.252) exhibited the maximum positive direct effect on fiber yield followed by middle diameter (0.226) and plant height (0.186). For the development of kenaf varieties with acceptable yield, effective selection would consider plant height, middle diameter, core diameter, dry stick weight, fresh stem weight with leaves and pod, and fresh stem weight without leaves and pod.

摘要

相关和通径系数分析有助于制定育种策略, 通过更好地理解这种关系, 通过选择提高产量性状. 本研究对31个红麻突变系的产量和产量相关性状进行了研究, 以确定其直接和间接效应, 从而确定更高纤维产量的选择标准. 方差分析表明, 除顶径外, 所有研究性状均存在显著差异, 其中基因型和基因型逐季互作差异不显著. 在表型和基因型水平上, 干纤维重量与7个性状显著相关. 因此, 基于这些性状的选择对提高红麻纤维产量是有效的. 通径分析表明, 无叶和荚果的鲜茎重 (0.223) 对单株纤维产量的贡献最大, 其次是株高 (0.202). 无叶和荚果的鲜茎重 (0.252) 对纤维产量的直接正效应最大, 其次是中径 (0.226) 和株高 (0.186). 对于产量可接受的红麻品种, 有效的选择应考虑株高、中径、核径、干杆重、有叶有荚鲜茎重和无叶无荚鲜茎重.

KEYWORDS:

• Kenaf
• phenotypic correlation
• path coefficient analysis
• cause-effect relationship

关键词:

• 红麻
• 表型相关
• 通径系数分析
• 因果关系

Highlights

• Kenaf is a Hibiscus genus (Malvaceae) fibre crop that is used to replace tobacco in Malaysia’s textile, construction, automotive, and other technology sectors.

• Determine the genetic variability, heritability, and paths of influence among various yield components of selected kenaf mutants, as well as their contribution to fibre yield.

• The results can be used to support the direct and indirect effects among kenaf mutants to develop selection criteria for better fibre yield as a first initiative for Malaysia’s tropical climate.

Acknowledgments

The authors would like to express their heartfelt gratitude to the Bangladesh Agriculture Research Council (BARC) and Universiti Putra Malaysia (UPM) for allowing them to conduct this research. The authors are also grateful to the Bangladesh Jute Research Institute (BJRI) and the Ministry of Agriculture of the People’s Republic of Bangladesh for referring the lead author to UPM for a PhD programme.

Author’s contributions

Conceptualization, Md Al-Mamun and Mohd Y. Rafii; Data curation, Md Al-Mamun and Md Mahmudul Hasan Khan; Formal analysis, Md Al-Mamun; Funding acquisition, Md Al- Mamun, Mohd Y. Rafii and Md Mahmudul Hasan Khan; Investigation, Mohd Y. Rafii, Zulkarami Berahim, Azizah Misran and Zaiton Ahmad; Supervision, Mohd Y. Rafii; Writing– original draft, Md Al-Mamun; Writing – review & editing, Zulkarami Berahim, Md Mahmudul Hasan Khan, Yusuff Oladosu and Fatai Arolu. All authors have read and agreed to the published version of the manuscript.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This research was funded by the Ministry of Agriculture, People’s Republic of Bangladesh, research [grant PIU-BARC-NATP-2] and the APC was funded by University Putra Malaysia;Ministry of Agriculture, People’s Republic of Bangladesh [PIU-BARC, -NATP-2];