QTL analyses for tolerance to abiotic stresses in a common bean (Phaseolus vulgaris L.) population

PloS One
Lucy Milena DiazBodo Raatz

Abstract

Common bean productivity is reduced by several abiotic stress factors like drought and low soil fertility, leading to yield losses particularly in low input smallholder farming systems in the tropics. To understand the genetics of stress tolerance, and to improve adaptation of common bean to adverse environments, the BAT 881 x G21212 population of 95 recombinant inbred lines (RILs) was evaluated under different abiotic stress conditions in 15 trials across four locations in Colombia, representing two higher altitude (Darién, Popayán) and two lower altitude (Palmira, Quilichao) locations. Stress vs non-stress treatments showed that yields were reduced in drought trials in Palmira by 13 and 31%, respectively, and observed yield reductions in low phosphorus stress were 39% in Quilichao, 16% in Popayán, and 71% in Darién, respectively. Yield components and biomass traits were also reduced. Traits linked to dry matter redistribution from stems, leaves and pods to seed, such as pod harvest index and total non-structural carbohydrates, were found to be important factors contributing to yield in all conditions. In contrast, early maturity was correlated with improved yield only in lower altitude locations, whereas in higher altitudes d...Continue Reading

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Citations

Jun 21, 2019·International Journal of Molecular Sciences·Jitendra KumarShiv Kumar
Dec 22, 2020·Frontiers in Plant Science·Paula Arielle Mendes Ribeiro ValdisserRosana Pereira Vianello
Jan 2, 2021·Horticulture Research·Susana Trindade LeitãoMaria Carlota Vaz Patto

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Datasets Mentioned

BETA
G21212

Methods Mentioned

BETA
genotyping
PCR
PCRs

Software Mentioned

MapDisto
QTL IciMapping
R
SAS
ggplot2
lme4

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