African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6429

Full Length Research Paper

Makafaci and Wachangu improved doubled haploid rice (Oryza sativa) varieties recommended for lowland cultivation in Malawi

Elias Jeke
  • Elias Jeke
  • Department of Agricultural Research Services (DARS), Lifuwu Agricultural Research Station (LARS), P. O. Box 102, Salima, Malawi.
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Tennyson Mzengeza
  • Tennyson Mzengeza
  • Department of Agricultural Research Services (DARS), Lifuwu Agricultural Research Station (LARS), P. O. Box 102, Salima, Malawi.
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Kyung-Ho Kang
  • Kyung-Ho Kang
  • National Institute of Crop Science, Rural Development Administration (RDA), South Korea and Africa Rice Center, Saint Louis, Senegal.
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Lazarus Chapo
  • Lazarus Chapo
  • Department of Agricultural Research Services (DARS), Lifuwu Agricultural Research Station (LARS), P. O. Box 102, Salima, Malawi.
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Mwai Malipa
  • Mwai Malipa
  • Department of Agricultural Research Services (DARS), Lifuwu Agricultural Research Station (LARS), P. O. Box 102, Salima, Malawi.
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Brian Boyce
  • Brian Boyce
  • Department of Agricultural Research Services (DARS), Lifuwu Agricultural Research Station (LARS), P. O. Box 102, Salima, Malawi.
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Memory Kachingwe
  • Memory Kachingwe
  • Department of Agricultural Research Services (DARS), Lifuwu Agricultural Research Station (LARS), P. O. Box 102, Salima, Malawi.
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Innocent Machira
  • Innocent Machira
  • Department of Agricultural Research Services (DARS), Lifuwu Agricultural Research Station (LARS), P. O. Box 102, Salima, Malawi.
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  •  Received: 14 July 2020
  •  Accepted: 21 October 2020
  •  Published: 31 January 2021

Abstract

The study was conducted in 2017/2018 and 2018/2019 rainy seasons at Nanzolo, Domasi and Mkondezi in three replications using the RCBD following the Mother-Baby Trial Approach. The objective of the study was to evaluate grain yield of twelve high-yielding rice (Oryza sativa) varieties that were selected and shared from elite Doubled Haploid germplasms of a Collaborative Project of KAFACI (RDA) and AGRA at Suwon in Korea and Africa Rice Centre, Senegal. An improved variety called Mtupatupa was used as a common check. Data collection was done on several traits including plant height at maturity, number of effective tillers and DUS as well as VCU. The two lines SR35285-HB3469-6 and Sahel 328 met farmers’ preferences during participatory variety selection because of earliness to maturity, high grain yield, medium to slender grain shape and long to extra-long, moderate aroma and absence of the white belly on the endosperm. The Genotype × Environment interaction summarized by the biplot of the two principal component axes explains 96.56% of the Genetics and Genotype × Environmental (GGE) variation. The hierarchical clustering pattern showed two main clusters in the dendrogram description. Genotypes SR35285-HB3469-6 and Sahel 328 had been therefore released as Wachangu and Makafaci, respectively, for lowland cultivation in Malawi.

Key words: Doubled Haploid, principal component analysis, DUS and VCU, GGE biplot, grain quality, grain yield, lowland, PVS.