Rice Diversity Panel Evaluated for Agro-Morphological Diversity by Multivariate Analysis

AbstractIdentification and characterization of the farmers’ named crop varieties cultivated around the world is a major issue for conservation and sustainable use of plant genetic resources. Intraspecific diversity is strongly determined by farmers’ socio-cultural environment, but this has little been documented. In this paper, we tested, on a contact zone among three ethnolinguistic groups located on the Mount Kenya region, whether farmers’ socio-cultural differences have an impact on the morphological characteristics of the farmers’ named sorghum varieties. Eighteen qualitative morphological traits of the panicles were measured. We first compared the morphological diversity of the named varieties among ethnolinguistic groups using multivariate analysis of homogeneity of groups’ dispersion and tested their differentiation using permutational multivariate analysis of variance. Discriminant analysis of principal components was then used to categorize the morphological diversity withouta priori, and this classification was compared with farmers’ local taxonomy (vernacular names) in the three ethnolinguistic groups. Our results show that some morphotypes are peculiar to some ethnolinguistic groups and that a morphotype can bear different variety names while the same variety name can be used to identify different morphotypes. Morphological differentiation that was explained by ethnolinguistic groups was higher for local landraces than for improved varieties. Our findings imply that socio-cultural diversity of farmers and the criteria they use to identify and maintain landraces need to be considered in studying and sampling crop diversity forin situas well as forex situconservation.

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Morphological and molecular diversity of the wild carrot Daucus pusillus: implications for classification and ex situ conservation

Botany ◽

10.1139/cjb-2013-0241 ◽

2014 ◽

Vol 92 (5) ◽

pp. 348-359 ◽

Cited By ~ 3

Author(s):

Maria S. Ibañez ◽

Elsa L. Camadro ◽

Carlos A. Sala ◽

Ricardo W. Masuelli

Keyword(s):

Multivariate Analysis ◽

North American ◽

Molecular Diversity ◽

Taxonomic Status ◽

Morphological Diversity ◽

Its Region ◽

Inter Simple Sequence Repeat ◽

Ex Situ ◽

Daucus Carota L ◽

5.8S Rdna

Daucus pusillus Michx. and Daucus montevidensis Link ex Spreng. are wild carrots from the Americas with unresolved taxonomic status. An investigation was carried out with accessions of D. pusillus and (or) D. montevidensis from Argentina for (i) morphological and molecular (amplified fragments length polymorphism (AFLP) and inter simple sequence repeat (ISSR)) characterization, (ii) analysis of congruence of morphological and molecular variation, and (iii) comparison of diversity for the internal transcribed spacer (ITS) region with that reported for a North American accession of D. pusillus. Twelve accessions of D. pusillus and (or) D. montevidensis — representing their geographical distribution in Argentina — and one accession each of wild Daucus carota L. and Daucus montanus Humb. & Bonpl. ex Schult. — as outgroups — were included. In the multivariate analysis of morphological diversity, two accessions were clearly differentiated; this result is not sustained by multivariate analysis of molecular diversity. Based on multivariate and molecular variance (AMOVA) analyses, D. pusillus and (or) D. montevidensis accessions were separated at the molecular level into two groups, associated with geographical origin. Because this result is not supported by morphology, the segregation into two taxa seems unjustified. In all accessions, ITS and 5.8S rDNA regions had identical sequences, which differ in one nucleotide from the corresponding sequence of the North American accession. According to the combined results, D. pusillus would be a single taxon distributed from North to South America, and D. montevidensis a nomenclatural synonym. Autogamy of D. pusillus and its highly structured genetic diversity (Fst = 0.86) allows the application of a geographically targeted approach for germplasm exploration, conservation and eventual use in pre-breeding.

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The genetics underlying metabolic signatures in a brown rice diversity panel and their vital role in human nutrition

The Plant Journal ◽

10.1111/tpj.15182 ◽

2021 ◽

Author(s):

Yariv Brotman ◽

Cindy Llorente‐Wiegand ◽

Glenn Oyong ◽

Saurabh Badoni ◽

Gopal Misra ◽

...

Keyword(s):

Brown Rice ◽

Vital Role ◽

Human Nutrition ◽

Diversity Panel ◽

Rice Diversity ◽

Metabolic Signatures

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Morphotype and Multivariate Analysis of the Occlusal Pattern of the First Lower Molar in European and Asian Arvicoline Species (Rodentia, Microtus, Alexandromys)

Zoodiversity ◽

10.15407/zoo2020.05.383 ◽

2020 ◽

Vol 54 (5) ◽

pp. 383-402

Author(s):

I. O. Synyavska ◽

V. N. Peskov

Keyword(s):

Multivariate Analysis ◽

Morphological Diversity ◽

Interspecific Differences ◽

Lower Molar

We studied the morphotypic variation of the occlusal pattern of m1 in 13 arvicoline species (genera Microtus and Alexandromys). As a result, 22 m1 morphotypes were identified. In Alexandromys, five morphotypes of m1 were found, while in Microtus only seven. The morphological diversity of m1 morphotypes (H) in voles of the genus Microtus is significantly lower compared to Alexandromys. The largest number of m1 morphotypes and the highest morphological diversity of m1 were revealed in the Mongolian vole (14 morphotypes and H = 2.134), while the lowest values (two morphotypes and H = 0.285) occur in the population of M. levis from Orlov Island. An attempt of ecological and taxonomical interpretation of interspecific differences was made based on the m1 morphotypes.

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