Agro-morphological Characterization of Cassava (Manihot esculenta Crantz) Collected in the Humid Forest and Guinea Savannah Agro-ecological Zones of Cameroon

Gaad D, Laouar M, Gaboun F, Abdelguerfi A. 2018. Collection and agro morphological characterization of Algerian accessions of lentil (Lens culinaris). Biodiversitas 19: 183-193. Lentil is one of the important pulse crops in Algeria. The narrow genetic base of local cultivars and the disappearance of many local accessions contribute to the loss of lentil biodiversity. Therefore, collection, characterization and preservation of existing local accessions of lentils are important. Lentil accessions were collected across different agro-ecological zones of Algeria. From 10 regions (Departments), 15 villages were surveyed and 30 accessions were collected. Eighteen local accessions and 26 references collection have been used for agro morphological evaluation. The assessment was performed in two locations, sub-humid and semi-arid conditions, based on 12 quantitative characters. The result of variance analysis shows a significant effect of the interaction genotype x location for six quantitative traits. Three macrosperma Algerian accessions characterized by a high number of pod/plant, number of seed/plant and seed yield/plant were positioned on PCA1. The remaining Algerian accessions were positioned on PCA2 and were characterized by later flowering and maturity with high plant stature and height of the lowest pods. Hierarchical cluster analysis grouped the accessions into five distinct clusters independently of the accessions origins and revealed the distribution of Algerian accessions in all of the groups. This study will help breeders to better select accessions to be used in lentil breeding program.

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Agro-morphological characterization of horned melon (Cucumis metuliferus) accessions from selected agro-ecological zones in Kenya

Australian Journal of Crop Science ◽

10.21475/ajcs.20.14.09.p2642 ◽

2020 ◽

pp. 1487-1496

Author(s):

Marline Hanny Owino ◽

Bernard Mukiri Gichimu ◽

Phyllis Wambui Muturi

Keyword(s):

Block Design ◽

Plant Genetic Resources ◽

Morphological Diversity ◽

Morphological Characterization ◽

Fruit Shape ◽

Fruit Weight ◽

Seed Shape ◽

Ecological Zones ◽

Agro Ecological Zones

Morphological characterization of genotypes is fundamental in providing information on their genetic status to guide on their conservation and improvement. The objective of this study was to determine agro-morphological diversity within horned melon in Kenya. The study was carried out in two seasons at the University of Embu in Kenya. The study characterized 19 horned melon accessions collected from different agro-ecological zones in Eastern, Central and Western regions in Kenya. The experiment was laid out in a randomized complete block design with three replications. Morphological characterization of the accessions was based on melon descriptors from International Plant Genetic Resources Institute (IPGRI) with slight modifications. Significant differences were observed in all the quantitative traits except the number of branches and main vine length. However, qualitative variations were only observed in fruit shape, rind colour and seed shape. Principle Component Analysis (PCA) showed that fruit weight, main vine length and days to maturity had the highest contribution to the observed diversity. Cluster analysis separated the accessions into seven groups with between classes diversity of 79.20% and within classes diversity of 20.80%. The diversity observed can be exploited by plant breeders for genetic improvement of the crop.

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Characterization of hemicellulose in Cassava (Manihot esculenta Crantz) stem during xylogenesis

Carbohydrate Polymers ◽

10.1016/j.carbpol.2021.118038 ◽

2021 ◽

Vol 264 ◽

pp. 118038

Author(s):

Haoqiang Yang ◽

Na Yi ◽

Shuai Zhao ◽

Zhouyang Xiang ◽

Mirza Faisal Qaseem ◽

...

Keyword(s):

Manihot Esculenta ◽

Manihot Esculenta Crantz

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Morphological And Ecogeographic Study Of The Diversity Of Cassava (Manihot esculenta Crantz) In Ecuador

10.20944/preprints202107.0422.v1 ◽

2021 ◽

Author(s):

Álvaro - Monteros-Altamirano ◽

César - Tapia ◽

Nelly - Paredes ◽

Victor Alulema ◽

Marcelo Tacán ◽

...

Keyword(s):

Manihot Esculenta ◽

Morphological Variability ◽

Morphological Characterization ◽

Economic Importance ◽

Extreme Conditions ◽

Morphological Descriptors ◽

Manihot Esculenta Crantz ◽

Qualitative And Quantitative ◽

Edaphic Conditions

Cassava (Manihot esculenta Crantz) is a crop of nutritional and economic importance worldwide, cultivated in more than 100 tropical and subtropical countries including Ecuador, traditionally cultivated in its three continental regions: the Amazon, the Coast and in the valleys of the Sierra. The purpose of this study was to characterize 195 accessions from INIAP's Ecuadorian cassava collection through 1) morphological characterization with qualitative and quantitative descriptors; and 2) ecogeographic characterization to know the climatic, geophysical and edaphic conditions in which cassava grows and which environments are frequent or marginal for its cultivation. For the morphological characterization, 27 morphological descriptors were used (18 qualitative and nine quantitative), and for the ecogeographic characterization, 55 variables (41 climatic, two geophysical and 12 edaphic). As a result, four morphological groups and three ecogeographic groups were identified. In the research, morphological variability was evidenced, mainly in descriptors related to the leaf, stems and inflorescences. In addition, it was possible to identify accessions that can adapt to extreme conditions of drought and poor soils, which could be used for improvement.

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