The relationship between primary metabolites in reproductive structures of cowpea Vigna unguiculata (Fabaceae: Papilionidae) cultivars and field resistance to the flower bud thrips Megalurothrips sjostedti (Thysanoptera: Thripidae)

Alabi, O.Y.; Odebiyi, J. A.; Tamò, Manuele

doi:10.1079/ijt200696

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…The significant location by genotype interaction for thrips damage scores (Table 3) confirmed the instability of cowpea resistance to flower thrips as found in the previous study. The lowest thrips damage scores recorded on Sanzi and on the combination of Sanzi with TVU-1509 confirmed the findings in the previous studies on these genotypes (Alabi et al, 2005;Abudulai et al, 2006;Omo-Ikerodah et al, 2009;Dormatey et al, 2015).…”

Section: Discussionsupporting

confidence: 88%

Inheritance of cowpea resistance to flower thrips in Uganda germplasm

Agbahoungba¹,

Karungi²,

Badji³

et al. 2018

J. Plant Breed. Crop Sci.

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Flower thrips [Megalurothrips sjostedti (Trybom)] is the most damaging insect pest on cowpea. However, information regarding the nature of gene action governing the inheritance of resistance to thrips is not available for cowpea genotypes in Uganda. This study was carried out to determine the inheritance pattern of cowpea resistance to flower thrips. Five resistant cowpea genotypes and three susceptible genotypes were crossed in full diallel mating design. F2 progenies were evaluated along with the parents in alpha lattice design with two replications under natural thrips infestation at Kabanyolo, Arua and Serere in Uganda. Combining ability analysis was performed using method one and model one of diallel analysis. The results showed that the environmental effects were highly significant (P<0.001). Additive, dominance and epistasis effects had major contributions. The broad sense heritability varied from 18 to 42% for thrips damage scores and from 0 to 6% for thrips counts. The estimates of narrow sense heritability were low for thrips damage score (2 to 18%) and thrips counts (0 to 9%). Genotypes TVU-1471 and TVU-1509 were identified as good transmitters of resistance to flower thrips. Crosses TVU-1509 x NE5, TVU-473 x Sanzi, TVU-123 x Sanzi, TVU-123 x TVU-473, and TVU-473 x TVU-1509 presented significant (P<0.05) and negative SCA effects for thrips damage scores and thrips counts and would be the most useful in breeding as some of their progenies would have high resistance to flower thrips. This study provides the basis of an efficient breeding program of cowpea for flower thrips resistance.

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Section: Discussionsupporting

confidence: 88%

Inheritance of cowpea resistance to flower thrips in Uganda germplasm

Agbahoungba¹,

Karungi²,

Badji³

et al. 2018

J. Plant Breed. Crop Sci.

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“…For example, resistant varieties have been described in cotton (Stanton et al 1992 ), common bean (Cardona et al 2002 ), pepper (Maris et al 2003 ), and cabbage (Stoner et al 1989 ). In cowpea, studies have identified sources of genetic resistance mainly against the flower bud thrips M. sjostedti (Abudulai et al 2006 ; Alabi et al 2006 ). Presently, no study has identified cowpea germplasm with resistance to the foliar feeding thrips species T. tabaci and Frankliniella sp.…”

Section: Introductionmentioning

confidence: 99%

QTL analysis for resistance to foliar damage caused by Thrips tabaci and Frankliniella schultzei (Thysanoptera: Thripidae) feeding in cowpea [Vigna unguiculata (L.) Walp.]

2009

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Three quantitative trait loci (QTL) for resistance to Thrips tabaci and Frankliniella schultzei were identified using a cowpea recombinant inbred population of 127 F2:8 lines. An amplified fragment length polymorphism (AFLP) genetic linkage map and foliar feeding damage ratings were used to identify genomic regions contributing toward resistance to thrips damage. Based on Pearson correlation analysis, damage ratings were highly correlated (r ≥ 0.7463) across seven field experiments conducted in 2006, 2007, and 2008. Using the Kruskall–Wallis and Multiple-QTL model mapping packages of MapQTL 4.0 software, three QTL, Thr-1, Thr-2, and Thr-3, were identified on linkage groups 5 and 7 accounting for between 9.1 and 32.1% of the phenotypic variance. AFLP markers ACC-CAT7, ACG-CTC5, and AGG-CAT1 co-located with QTL peaks for Thr-1, Thr-2, and Thr-3, respectively. Results of this study will provide a resource for molecular marker development and the genetic characterization of foliar thrips resistance in cowpea.

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“…Glycosylation has been reported as an essential step in biosynthesis of ginsenosides . Our results may reveal the different extent of bio‐transformation of primary metabolites, such as sugar, into secondary metabolites (ginsenosides) between the wild‐type and cultivated‐type American ginsengs, which may be attributed to their different growing conditions, such as growing time and/or growing environment . Figure shows the non‐/minimal‐destructive nature of tissue‐spray ionization.…”

Section: Resultsmentioning

confidence: 78%

Tissue‐spray ionization mass spectrometry for raw herb analysis

Chan

Wong

Tang

et al. 2011

Rapid Comm Mass Spectrometry

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Tissue-spray ionization mass spectrometry is developed for the in situ chemical analysis of raw herbs under ambient conditions. We demonstrated that analyte molecules could be directly sprayed and ionized from solvent-wetted ginseng tissues upon the application of high electrical voltage to the tissue sample. Abundant phytochemicals/ metabolites, including ginsenosides, amino acids and oligosaccharides, could be detected from ginseng tissues when the tissue-spray experiments were conducted in positive ion mode. Thermally labile and easily hydrolyzed malonyl-ginsenosides were also detected in negative ion mode. The tissue-spray ionization method enables the direct detection of analytes from raw herb samples and preserves the sample integrity for subsequent morphological and/ or microscopic examination. In addition, this method is simple and fast for chemical profiling of wild-type and cultivated-type American ginsengs with differentiation.

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The relationship between primary metabolites in reproductive structures of cowpea Vigna unguiculata (Fabaceae: Papilionidae) cultivars and field resistance to the flower bud thrips Megalurothrips sjostedti (Thysanoptera: Thripidae)

Cited by 5 publications

References 9 publications

Inheritance of cowpea resistance to flower thrips in Uganda germplasm

Inheritance of cowpea resistance to flower thrips in Uganda germplasm

QTL analysis for resistance to foliar damage caused by Thrips tabaci and Frankliniella schultzei (Thysanoptera: Thripidae) feeding in cowpea [Vigna unguiculata (L.) Walp.]

Tissue‐spray ionization mass spectrometry for raw herb analysis

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