Abstract
The introduction of genes from wild species is a practice little adopted by breeders for the improvement of commercial crops, although it represents an excellent opportunity to enrich the genetic basis and create new cultivars. In peanut, this practice is being increasingly adopted. In this study we present results of introgression of wild alleles from the wild species Arachis duranensis and A. batizocoi improving photosynthetic traits and yield in a set of lines derived from the cross of an induced allotetraploid and cultivated peanut with selection under water stress. The assays were carried out in greenhouse and field focusing on physiological and agronomic traits. A multivariate model (UPGMA) was adopted in order to classify drought tolerant lines. Several lines showed improved levels of tolerance, with values similar to or greater than the tolerant control. Two BC1F6 lines (53 P4 and 96 P9) were highlighted for good drought-related traits, earliness and pod yield, having better phenotypic profile to the drought tolerant elite commercial cultivar BR1. These lines are good candidates for the creation of peanut cultivars suitable for production in semiarid environments.
Highlights
Drought is a widespread environmental phenomenon with damaging social and economic consequences in arid and semiarid environments
According to Brasileiro et al [33], transcriptome profiling of wild Arachis under water-limited environments, leaves and roots of A. duranensis revealed several transcripts involved with drought tolerance, such as Expansin, Nitrilase, NAC, and bZIP transcription factors
The BR1 is a peanut cultivar widely grown in semiarid environment
Summary
Drought is a widespread environmental phenomenon with damaging social and economic consequences in arid and semiarid environments. The development of plant cultivars adapted to environments prone to drought is a valuable strategy in improvement programs and a great challenge due to complex genetic inheritance [1]. Drought response involves cascades of events with consequences in biochemistry, physiology, and phenotype [2, 3]. To simplify the process of selection, breeders can use surrogate traits in order to assist the identification of plants tolerant to drought.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
