KASPar SNP genetic map of cassava for QTL discovery of productivity traits in moderate drought stress environment in Africa

Abstract Cassava is an important staple in Sub-Sahara Africa. While its production has rapidly expanded to the dry savannahs of the continent, productivity is low in this ecology due to drought by farmers, extending the growth cycle from 12 months to 18, and sometimes 24 months to ensure better harv...

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Autores principales:	Favour Ewa, Joseph N. A. Asiwe, Emmanuel Okogbenin, Alex C. Ogbonna, Chiedozie Egesi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/53b40a9719fc4ac08e91509bc1bf67d2
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spelling	oai:doaj.org-article:53b40a9719fc4ac08e91509bc1bf67d22021-12-02T16:53:00ZKASPar SNP genetic map of cassava for QTL discovery of productivity traits in moderate drought stress environment in Africa10.1038/s41598-021-90131-82045-2322https://doaj.org/article/53b40a9719fc4ac08e91509bc1bf67d22021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90131-8https://doaj.org/toc/2045-2322Abstract Cassava is an important staple in Sub-Sahara Africa. While its production has rapidly expanded to the dry savannahs of the continent, productivity is low in this ecology due to drought by farmers, extending the growth cycle from 12 months to 18, and sometimes 24 months to ensure better harvests. Yield is a complex trait and often difficult to manipulate for genetic gain in conventional breeding. Unfortunately, the dearth of molecular tools for decades has hampered molecular breeding (MB) to improve cassava productivity. This study was conducted to explore KASpar SNPs to generate more molecular tools to enhance genetic dissection of elite African germplasm for improved cassava productivity in dry environments of Africa where molecular resources are highly limited for crop improvement. To aid molecular genetic analysis of traits, a linkage map covering 1582.8 cM with an average resolution of 3.69 cM was constructed using 505 polymorphic SNP markers distributed over 21 linkage groups. Composite interval mapping using 267 F1 progeny in initial QTL mapping identified 27 QTLs for productivity traits in the dry savannah of Nigeria. The availability of KASPar SNPs are anticipated to improve the implementation of MB for the development of high performing drought-tolerant cassava varieties in Africa.Favour EwaJoseph N. A. AsiweEmmanuel OkogbeninAlex C. OgbonnaChiedozie EgesiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Favour Ewa Joseph N. A. Asiwe Emmanuel Okogbenin Alex C. Ogbonna Chiedozie Egesi KASPar SNP genetic map of cassava for QTL discovery of productivity traits in moderate drought stress environment in Africa
description	Abstract Cassava is an important staple in Sub-Sahara Africa. While its production has rapidly expanded to the dry savannahs of the continent, productivity is low in this ecology due to drought by farmers, extending the growth cycle from 12 months to 18, and sometimes 24 months to ensure better harvests. Yield is a complex trait and often difficult to manipulate for genetic gain in conventional breeding. Unfortunately, the dearth of molecular tools for decades has hampered molecular breeding (MB) to improve cassava productivity. This study was conducted to explore KASpar SNPs to generate more molecular tools to enhance genetic dissection of elite African germplasm for improved cassava productivity in dry environments of Africa where molecular resources are highly limited for crop improvement. To aid molecular genetic analysis of traits, a linkage map covering 1582.8 cM with an average resolution of 3.69 cM was constructed using 505 polymorphic SNP markers distributed over 21 linkage groups. Composite interval mapping using 267 F1 progeny in initial QTL mapping identified 27 QTLs for productivity traits in the dry savannah of Nigeria. The availability of KASPar SNPs are anticipated to improve the implementation of MB for the development of high performing drought-tolerant cassava varieties in Africa.
format	article
author	Favour Ewa Joseph N. A. Asiwe Emmanuel Okogbenin Alex C. Ogbonna Chiedozie Egesi
author_facet	Favour Ewa Joseph N. A. Asiwe Emmanuel Okogbenin Alex C. Ogbonna Chiedozie Egesi
author_sort	Favour Ewa
title	KASPar SNP genetic map of cassava for QTL discovery of productivity traits in moderate drought stress environment in Africa
title_short	KASPar SNP genetic map of cassava for QTL discovery of productivity traits in moderate drought stress environment in Africa
title_full	KASPar SNP genetic map of cassava for QTL discovery of productivity traits in moderate drought stress environment in Africa
title_fullStr	KASPar SNP genetic map of cassava for QTL discovery of productivity traits in moderate drought stress environment in Africa
title_full_unstemmed	KASPar SNP genetic map of cassava for QTL discovery of productivity traits in moderate drought stress environment in Africa
title_sort	kaspar snp genetic map of cassava for qtl discovery of productivity traits in moderate drought stress environment in africa
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/53b40a9719fc4ac08e91509bc1bf67d2
work_keys_str_mv	AT favourewa kasparsnpgeneticmapofcassavaforqtldiscoveryofproductivitytraitsinmoderatedroughtstressenvironmentinafrica AT josephnaasiwe kasparsnpgeneticmapofcassavaforqtldiscoveryofproductivitytraitsinmoderatedroughtstressenvironmentinafrica AT emmanuelokogbenin kasparsnpgeneticmapofcassavaforqtldiscoveryofproductivitytraitsinmoderatedroughtstressenvironmentinafrica AT alexcogbonna kasparsnpgeneticmapofcassavaforqtldiscoveryofproductivitytraitsinmoderatedroughtstressenvironmentinafrica AT chiedozieegesi kasparsnpgeneticmapofcassavaforqtldiscoveryofproductivitytraitsinmoderatedroughtstressenvironmentinafrica
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KASPar SNP genetic map of cassava for QTL discovery of productivity traits in moderate drought stress environment in Africa

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