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. 2022 Jun 10;12(1):9646.
doi: 10.1038/s41598-022-13529-y.

Combining ability and gene action for yield improvement in kenaf (Hibiscus cannabinus L.) under tropical conditions through diallel mating design

Md Al-Mamun  1   2 , Mohd Y Rafii  3   4 , Azizah Binti Misran  5 , Zulkarami Berahim  6 , Zaiton Ahmad  7 , Md Mahmudul Hasan Khan  6   8 , Yusuff Oladosu  6
Affiliations

Combining ability and gene action for yield improvement in kenaf (Hibiscus cannabinus L.) under tropical conditions through diallel mating design

Md Al-Mamun et al. Sci Rep. .

Abstract

Nine morphologically distinct kenaf genotypes were hybridized to produce 36 hybrids following a half diallel mating design. The combining ability and gene action of 15 yield and yield components were assessed in hybrids and their parents across two environments. Except for the mid diameter and plant height traits, there were highly significant differences (p ≤ 0.01) between the environments and the interaction of genotype and environment. Additive gene effects were considerable for the inheritance of these traits, and the expression of these additive genes was heavily influenced by the environment. Significant differences were found for all studied traits for GCA except top diameter and SCA except plant height and top diameter, implying the presence of both additive and non-additive gene action for the inheritance of the concerned characters. For all features except top diameter and number of nodes, the magnitude of GCA variation was significantly higher than that of SCA variance, indicating the additive gene's predominance. The parental lines P1, P3 and P4 were outstanding general combiners for fiber yield and yield-related parameters. Considering combining ability and genetic analysis study, the crosses P1 × P4, P1 × P9, P2 × P3, P2 × P5, P4 × P6, P4 × P7, P4 × P9, P5 × P8, and P7 × P9 were found promising for their heterotic response to higher fiber yield, stick yield, seed yield and could be for future improvement in kenaf breeding programmes.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
Photographs of the parents' and F1 population for stem coloration (70 DAS).
Figure 2
Figure 2
Photographs of the parents' and F1 population for leaf shapes and coloration.
Figure 3
Figure 3
Photographs of the parents' and F1 population for pod shapes and colors.
Figure 4
Figure 4
Qualitative variation in the kenaf F1 population (a) Stem color, (b) Leaf shape, (c) Leaf color (lamina), (d) Petiole color, (e) Pod shape, (f) Seed shape, and (g) Seed coat color.
See this image and copyright information in PMC

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