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Replication Data for: Heritability and genetic gains for iron and zinc concentration in diploid potato

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Title Replication Data for: Heritability and genetic gains for iron and zinc concentration in diploid potato
 
Identifier https://doi.org/10.21223/9OJPJ7
 
Creator Amoros, Walter
Salas, Elisa
Hualla, Vilma
Burgos, Gabriela
De Boeck, Bert
Eyzaguirre, Raul
Zum Felde,Thomas
Bonierbale, Merideth
 
Publisher International Potato Center
 
Description Amain breeding target of the International Potato Center (CIP) has been the biofortification
of potato (Solanum tuberosum L.) with the essential micronutrients
iron and zinc. This study assessed the broad-sense heritability (H2) and genetic
gains (ΔGs) achieved for iron and zinc concentrations in potato tubers and their
relationships with yield components through three cycles of recurrent selection
at the diploid level. Sixty genotypes comprising 17 Andean landraces from a base
population called Cycle 0, 21 genotypes from Cycle II, and 22 fromCycle III were
grown in field trials over 2 yr to comparemicronutrient concentrations and agronomic
performance. The effects of cycles and cycles × location interactions were
both significant (P < .01) for all characters except tuber yield. High phenotypic
and genotypic coefficients of variation along with high H2 (0.81 ± 0.19 for both
iron and zinc) suggested that these parameterswere under the control of additive
gene effects and could be effectively manipulated by recurrent selection. Large
gains of more than 29% iron and 26% zinc were demonstrated. There were slight
decreases in dry matter (DM) content of 2 and 5% in Cycles II and III, respectively.
Iron concentration had the greatest positive direct effect on total number
of tubers per plant, and zinc had a weak negative direct effect on average tuber
weight. Selected iron- and zinc-dense genotypes with high, positive general combining
ability were identified for use in an interploidy (4x–2x) breeding scheme
aimed at increasing the iron and zinc contents of stable, high-yielding disease
and stress-resistant varieties.
 
Subject Agricultural Sciences
Dry matter
Dry matter weight
Genotype environment interaction
Broad-sense heritability
Spectrophotometry
Genetic gain
 
Language English
 
Contributor Admin, Dataverse
United States Agency for International Development (USAID)
Program of GIZ and the German Federal Employment Agency
Harvest Plus
CGIAR Research Program on Roots, Tubers and Bananas (RTB)
International Potato Center