Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda

Alphonse Nyombayire; John Derera; Julia Sibiya; Claver Ngaboyisonga

doi:doi:10.11648/j.jps.20210905.12

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Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda

Alphonse Nyombayire, John Derera, Julia Sibiya, Claver Ngaboyisonga

Published in Journal of Plant Sciences (Volume 9, Issue 5)

Received: 20 July 2021 Accepted: 6 August 2021 Published: 26 September 2021

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Abstract

Maize breeding programmes exploit inbred lines with superior combining ability for grain yield and other agronomic traits to create competitive hybrids. Therefore, the objectives of this study were to determine heterotic groups of locally developed maize inbred lines, their heterotic relationships, with exotic testers as well as the gene action controlling grain yield. Nineteen maize inbred lines were crossed to four testers, based on a line x tester mating scheme resulting in 76 test crosses. These crosses were evaluated together with four checks in 10 x 8 α-lattice design across four locations in 2015B and 2016A seasons. Both additive and non-additive gene action were important for grain yield with preponderance of additive gene action. The most desirable GCA effects for grain yield were realized in inbred line 8 while the highest desirable SCA effects were displayed by the test cross 18xT1. Generally, most of the inbred lines exhibited positive heterosis with all testers. However, there was more aligning firstly towards tester T2 and then to T3. The highest heterosis was displayed by the combination of inbred line 8 with 3. Regardless of the heterotic grouping method applied, the inbred lines were discriminated into different heterotic groups; two and nine heterotic groups were identified based on standard heterosis and SCA effects; respectively. The information generated would be useful in optimizing the maize hybrid breeding programme in Rwanda and for other researchers for high yielding maize variety development.

Published in	Journal of Plant Sciences (Volume 9, Issue 5)
DOI	10.11648/j.jps.20210905.12
Page(s)	245-252
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Gene Action, Heterosis, Heterotic Group

References

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APA Style

Alphonse Nyombayire, John Derera, Julia Sibiya, Claver Ngaboyisonga. (2021). Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda. Journal of Plant Sciences, 9(5), 245-252. https://doi.org/10.11648/j.jps.20210905.12

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ACS Style

Alphonse Nyombayire; John Derera; Julia Sibiya; Claver Ngaboyisonga. Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda. J. Plant Sci. 2021, 9(5), 245-252. doi: 10.11648/j.jps.20210905.12

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AMA Style

Alphonse Nyombayire, John Derera, Julia Sibiya, Claver Ngaboyisonga. Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda. J Plant Sci. 2021;9(5):245-252. doi: 10.11648/j.jps.20210905.12

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@article{10.11648/j.jps.20210905.12,
  author = {Alphonse Nyombayire and John Derera and Julia Sibiya and Claver Ngaboyisonga},
  title = {Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda},
  journal = {Journal of Plant Sciences},
  volume = {9},
  number = {5},
  pages = {245-252},
  doi = {10.11648/j.jps.20210905.12},
  url = {https://doi.org/10.11648/j.jps.20210905.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jps.20210905.12},
  abstract = {Maize breeding programmes exploit inbred lines with superior combining ability for grain yield and other agronomic traits to create competitive hybrids. Therefore, the objectives of this study were to determine heterotic groups of locally developed maize inbred lines, their heterotic relationships, with exotic testers as well as the gene action controlling grain yield. Nineteen maize inbred lines were crossed to four testers, based on a line x tester mating scheme resulting in 76 test crosses. These crosses were evaluated together with four checks in 10 x 8 α-lattice design across four locations in 2015B and 2016A seasons. Both additive and non-additive gene action were important for grain yield with preponderance of additive gene action. The most desirable GCA effects for grain yield were realized in inbred line 8 while the highest desirable SCA effects were displayed by the test cross 18xT1. Generally, most of the inbred lines exhibited positive heterosis with all testers. However, there was more aligning firstly towards tester T2 and then to T3. The highest heterosis was displayed by the combination of inbred line 8 with 3. Regardless of the heterotic grouping method applied, the inbred lines were discriminated into different heterotic groups; two and nine heterotic groups were identified based on standard heterosis and SCA effects; respectively. The information generated would be useful in optimizing the maize hybrid breeding programme in Rwanda and for other researchers for high yielding maize variety development.},
 year = {2021}
}

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TY - JOUR
T1 - Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda
AU - Alphonse Nyombayire
AU - John Derera
AU - Julia Sibiya
AU - Claver Ngaboyisonga
Y1 - 2021/09/26
PY - 2021
N1 - https://doi.org/10.11648/j.jps.20210905.12
DO - 10.11648/j.jps.20210905.12
T2 - Journal of Plant Sciences
JF - Journal of Plant Sciences
JO - Journal of Plant Sciences
SP - 245
EP - 252
PB - Science Publishing Group
SN - 2331-0731
UR - https://doi.org/10.11648/j.jps.20210905.12
AB - Maize breeding programmes exploit inbred lines with superior combining ability for grain yield and other agronomic traits to create competitive hybrids. Therefore, the objectives of this study were to determine heterotic groups of locally developed maize inbred lines, their heterotic relationships, with exotic testers as well as the gene action controlling grain yield. Nineteen maize inbred lines were crossed to four testers, based on a line x tester mating scheme resulting in 76 test crosses. These crosses were evaluated together with four checks in 10 x 8 α-lattice design across four locations in 2015B and 2016A seasons. Both additive and non-additive gene action were important for grain yield with preponderance of additive gene action. The most desirable GCA effects for grain yield were realized in inbred line 8 while the highest desirable SCA effects were displayed by the test cross 18xT1. Generally, most of the inbred lines exhibited positive heterosis with all testers. However, there was more aligning firstly towards tester T2 and then to T3. The highest heterosis was displayed by the combination of inbred line 8 with 3. Regardless of the heterotic grouping method applied, the inbred lines were discriminated into different heterotic groups; two and nine heterotic groups were identified based on standard heterosis and SCA effects; respectively. The information generated would be useful in optimizing the maize hybrid breeding programme in Rwanda and for other researchers for high yielding maize variety development.
VL - 9
IS - 5
ER -

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Author Information

Alphonse Nyombayire

African Centre for Crop Improvement, University of KwaZulu-Natal, Pietermaritzburg, South Africa
John Derera

African Centre for Crop Improvement, University of KwaZulu-Natal, Pietermaritzburg, South Africa
Julia Sibiya

African Centre for Crop Improvement, University of KwaZulu-Natal, Pietermaritzburg, South Africa
Claver Ngaboyisonga

Research and Technology Transfer Department, Rwanda Agriculture and Animal Resource Development Board, Kigali, Rwanda

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APA Style

Alphonse Nyombayire, John Derera, Julia Sibiya, Claver Ngaboyisonga. (2021). Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda. Journal of Plant Sciences, 9(5), 245-252. https://doi.org/10.11648/j.jps.20210905.12

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ACS Style

Alphonse Nyombayire; John Derera; Julia Sibiya; Claver Ngaboyisonga. Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda. J. Plant Sci. 2021, 9(5), 245-252. doi: 10.11648/j.jps.20210905.12

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AMA Style

Alphonse Nyombayire, John Derera, Julia Sibiya, Claver Ngaboyisonga. Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda. J Plant Sci. 2021;9(5):245-252. doi: 10.11648/j.jps.20210905.12

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@article{10.11648/j.jps.20210905.12,
  author = {Alphonse Nyombayire and John Derera and Julia Sibiya and Claver Ngaboyisonga},
  title = {Heterotic Groups, Gene Action and Heterosis Among Maize Inbred Lines Selected for the Major Agro-ecologies of Rwanda},
  journal = {Journal of Plant Sciences},
  volume = {9},
  number = {5},
  pages = {245-252},
  doi = {10.11648/j.jps.20210905.12},
  url = {https://doi.org/10.11648/j.jps.20210905.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jps.20210905.12},
  abstract = {Maize breeding programmes exploit inbred lines with superior combining ability for grain yield and other agronomic traits to create competitive hybrids. Therefore, the objectives of this study were to determine heterotic groups of locally developed maize inbred lines, their heterotic relationships, with exotic testers as well as the gene action controlling grain yield. Nineteen maize inbred lines were crossed to four testers, based on a line x tester mating scheme resulting in 76 test crosses. These crosses were evaluated together with four checks in 10 x 8 α-lattice design across four locations in 2015B and 2016A seasons. Both additive and non-additive gene action were important for grain yield with preponderance of additive gene action. The most desirable GCA effects for grain yield were realized in inbred line 8 while the highest desirable SCA effects were displayed by the test cross 18xT1. Generally, most of the inbred lines exhibited positive heterosis with all testers. However, there was more aligning firstly towards tester T2 and then to T3. The highest heterosis was displayed by the combination of inbred line 8 with 3. Regardless of the heterotic grouping method applied, the inbred lines were discriminated into different heterotic groups; two and nine heterotic groups were identified based on standard heterosis and SCA effects; respectively. The information generated would be useful in optimizing the maize hybrid breeding programme in Rwanda and for other researchers for high yielding maize variety development.},
 year = {2021}
}

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