10 documents found, page 1 of 1

Evaluation of cassava germplasm for drought tolerance under field conditions.

The development of cassava (Manihot esculenta Crantz) with a high yield under water-deficit conditions is one of the goal of the breeding programs. The objective of this study was to evaluate the performance and to select cassava accessions based on drought tolerance indices and productive potential under water stress. Forty-nine accessions were evaluated for five agronomic traits (plant height?PH, root yield?R...

Early prediction models for cassava root yield in different water regimes.

The development of cassava (Manihot esculenta Crantz) varieties with greater tolerance of water deficit depends on optimized phenotyping tools. The objective of this work was to develop early prediction models of final root yield (12 months after planting - MAP) using physiological and agronomic data obtained at 4 MAP under two water regimes. Nine genotypes of cassava were evaluated under two treatments (irriga...

Identification and characterization of the GmRD26 soybean promoter in response ...

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Identification of duplicates in cassava germplasm banks based on single-nucleot...

Genetic redundancy in cassava (Manihot esculenta Crantz) presents a challenge to efficient management of genetic resources. This study aimed to identify and define the ge-netic structure of duplicates in cassava germplasm from various Embrapa research units, using single-nucleotide polymorphism (SNP) markers. We evaluated 2,371 accessions with 20,712 SNPs. The identification of duplicates was performed based on...

A survey of genes involved in Arachis stenosperma resistance to Meloidogyne are...

Root-knot nematodes constitute a constraint for important crops, including peanut (Arachis hypogaea L.). Resistance to Meloidogyne arenaria has been identi fied in the peanut wild relative Arachis stenosperma Krapov. & W. C. Greg., in which the induction of feeding sites by the nematode was inhibited by an early hypersensitive response (HR). Here, the transcription expression pro fi les of 19 genes selected fro...

Root transcriptome analysis of wild peanut reveals candidate genes for nematode...

Wild peanut relatives (Arachis spp.) are genetically diverse and were adapted to a range of environments during the evolution course, constituting an important source of allele diver-sity for resistance to biotic and abiotic stresses. The wild diploid A.stenosperma harbors high levels of resistance to a variety of pathogens, including the root-knot nematode (RKN)Meloidogyne arenaria through the onset of the Hyp...

Transcriptome profiling of wild Arachis from water-limited environments uncover...

Peanut (Arachis hypogaeaL.) is an important le-gume cultivated mostly in drought-prone areas where its pro-ductivity can be limited by water scarcity. The development of more drought-tolerant varieties is, therefore, a priority for pea-nut breeding programs worldwide. In contrast to cultivated peanut, wild relatives have a broader genetic diversity and constitute a rich source of resistance/tolerance alleles to...

Genetic parameters for drought-tolerance in cassava.

The objective of this work was to evaluate the effect of drought on genetic parameters and breeding values of cassava. The experiments were carried out in a completely randomized block design with three replicates, under field conditions with (WD) or without (FI) water deficit. Yield of storage roots (RoY), shoot (ShY), and starch (StY), as well as the number of roots (NR), and root dry matter content (DMC) wer...

The resurrection plant tripogon spicatus (Poaceae) harbors a diversity of plant...

Plant species that naturally occur in the brazilian Caatinga (xeric shrubland) adapt in several ways to these harsh conditions, and that can be exploited to increase crop production. among the strategic adaptations to confront low water availability, desiccation tolerance stands out. Up to now, the association of those species with beneficial soil microorganisms is not well understood. The aim of this study was...

Reference genes for quantitative reverse transcription-polymerase chain reactio...