The importance and challenges of crop germplasm interdependence: the case of Bhutan

Ghimiray, Mahesh; Vernooy, Ronnie

doi:10.1007/s12571-017-0647-5

Cited by 15 publications

(9 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such flows are probably facilitated by Agricultural Development Projects (ADPs). Similar suggestion was made by MAHESH & RONNIE (2017). They reported that one of the routes through which germplasms could get in to a region is donor-assisted projects involved in agricultural development.…”

Section: Resultssupporting

confidence: 64%

Collection and Documentation of Melon Germplasm in Nigeria

Gado¹,

Muhammad²,

Falusi³

et al. 2019

J. Plant Develop.

View full text Add to dashboard Cite

Members of family Cucurbitaceae are collectively called melon; they are mainly found in the warmer parts of all continents. A germplasm collection was undertaken in Nigeria between April and August, 2015 which corresponded to the periods of harvesting of the crop across major growing regions of the country. Eighteen states including Federal Capital Territory, which are the major growing areas of the crop, were visited. The collections were done in collaboration with Agricultural Development Projects (ADP) extension officers. Fifty five farmers were interviewed and a total of 60 accessions were collected. The accessions collected were identified to species level. All the 60 accessions fall into 5 genera and 7 species; Colocynthis citrullus (45), Cucurbita moschata (3), Cucurbita maxima (3), Lagenaria siceraria (2), Lagenaria sphaerica (2), Cucumeropsis mannii (4) and Cucumis melo (1). All the farmers interviewed preferred cultivation of Colocynthis citrullus due its high oil content, demand and more acceptance by consumers all over the regions. Niger state had highest number (8) of Egusi melon (Colocynthis citrullus) while Nasarawa and Kogi had same number (5) each. The high number of egusi melon encountered might be due to fact that it is the most cultivated member of Cucurbitaceae in the country. This collection had boasted the baseline information of diversity of family Cucurbitaceae. Also it has generated source of genetic variability for members like Colocynthis citrullus which can be aid in improvement of the crop.

show abstract

Section: Resultssupporting

confidence: 64%

Collection and Documentation of Melon Germplasm in Nigeria

Gado¹,

Muhammad²,

Falusi³

et al. 2019

J. Plant Develop.

View full text Add to dashboard Cite

show abstract

“…Therefore, there is well in excess of 100 cultivars to fill the global annual market of 8500 to 10,500 Tg. As New Zealand provides 50 to 55% of this seed, there is increased motivation and economic benefits to breed elite cultivars for the market, and germplasm forms one the foundations for cultivar development, food, and agriculture (Ghimiray and Vernooy, 2017).…”

Section: Resultsmentioning

confidence: 99%

Identification of Founding Accessions and Patterns of Relatedness and Inbreeding Derived from Historical Pedigree Data in a White Clover Germplasm Collection in New Zealand

et al. 2019

View full text Add to dashboard Cite

Pedigrees provide suitable input for tracking breeding crosses and monitor plants and animal populations. Pedigree analysis is an essential tool to visualize and describe population structure and genetic diversity. Pasture plant breeding relies on a range of strategies from closed system recurrent selection using elite cultivars to diversity‐focused programs using ecotypes and wild germplasm as parents. There is currently no published pedigree analysis of white clover (Trifolium repens L.), despite over a century of breeding efforts in New Zealand. A pedigree map was constructed for white clover germplasm stored in the Margot Forde Germplasm Centre located in Palmerston North, New Zealand. Inbreeding and kinship coefficients and the effective number of founders through time were estimated to assess genetic relatedness in the reference population. A total of 15,265 accessions were included in the map. The maximum number of traced generations was 15, and the mean completeness of parentage for the reference population was 72%. The mean number of offspring was 5.14. The origin of founding and introduced accessions was assessed. The effective number of founders was 175.68 or 17.5% of the total number of reference founders. Founding accessions and influencing ancestors were identified. One of the earliest parental accessions identified was ‘North Canterbury Type I’ from 1941. Relatedness was determined using the k coefficient, with k = 1 as complete relatedness. The overall mean relatedness was k = 0.002. Overall mean inbreeding level was 0.39%. Relatedness and inbreeding coefficients revealed distinct germplasm pools formed across time that are of interest to pre‐breeding efforts.

show abstract

“…Nowadays, agriculture is facing challenges for crop production and the plant research community needs to perform quantitative analyses of numerous plant traits in order to accelerate progress in breeding [3,4]. This is why crop germplasm collections are of tremendous importance since no production area is fully self-sufficient in genetic diversity to cover all producer and consumer demand [5]. A germplasm collection is ordinarily evaluated with morphological descriptors which is usually the first step for describing accessions and selecting genitors for breeding programs [6,7].…”

mentioning

confidence: 99%

3D characterization of walnut morphological traits using X-ray computed tomography

et al. 2020

View full text Add to dashboard Cite

Background: Walnuts are grown worldwide in temperate areas and producers are facing an increasing demand. In a climate change context, the industry also needs cultivars that provide fruits of quality. This quality includes satisfactory filling ratio, thicker shell, ease of cracking, smooth shell and round-shaped walnut, and larger nut size. These desirable traits have been analysed so far using calipers or micrometers, but it takes a lot of time and requires the destruction of the sample. A challenge to take up is to develop an accurate, fast and non-destructive method for quality-related and morphometric trait measurements of walnuts, that are used to characterize new cultivars or collections in any germplasm management process. Results: In this study, we develop a method to measure different morphological traits on several walnuts simultaneously such as morphometric traits (nut length, nut face and profile diameters), traits that previously required opening the nut (shell thickness, kernel volume and filling kernel/nut ratio) and traits that previously were difficult to quantify (shell rugosity, nut sphericity, nut surface area and nut shape). These measurements were obtained from reconstructed 3D images acquired by X-ray computed tomography (CT). A workflow was created including several steps: noise elimination, walnut individualization, properties extraction and quantification of the different parts of the fruit. This method was applied to characterize 50 walnuts of a part of the INRAE walnut germplasm collection made of 161 unique accessions, obtained from the 2018 harvest. Our results indicate that 50 walnuts are sufficient to phenotype the fruit quality of one accession using X-ray CT and to find correlations between the morphometric traits. Our imaging workflow is suitable for any walnut size or shape and provides new and more accurate measurements. Conclusions: The fast and accurate measurement of quantitative traits is of utmost importance to conduct quantitative genetic analyses or cultivar characterization. Our imaging workflow is well adapted for accurate phenotypic characterization of a various range of traits and could be easily applied to other important nut crops.

show abstract

The importance and challenges of crop germplasm interdependence: the case of Bhutan

Cited by 15 publications

References 3 publications

Collection and Documentation of Melon Germplasm in Nigeria

Collection and Documentation of Melon Germplasm in Nigeria

Identification of Founding Accessions and Patterns of Relatedness and Inbreeding Derived from Historical Pedigree Data in a White Clover Germplasm Collection in New Zealand

3D characterization of walnut morphological traits using X-ray computed tomography

Contact Info

Product

Resources

About