Agrobiodiversity Indicators and Measurement using R for Description, Monitoring, Comparison, Relatedness, Conservation and Utilization

Joshi, Bal Krishna

doi:10.33002/aa010103

Cited by 2 publications

(1 citation statement)

References 46 publications

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“…The Shannon-Wiener index, a well-known diversity index developed by Claude E. Shannon and Norbert Wiener in 1949 (Spellerberg & Fedor, 2003), explains the state of diversity in a particular attribute and species. The higher the value of the diversity index, the more diversity present in the trait (Joshi, 2021). The diversity index (H′) computed from 26 qualitative characters exhibited low index value (H′ =0.1) for distribution of anthocyanin colour for leaf blade and high index value (H′=0.89) for intensity of green colour of leaf blade (Table 3).…”

Section: Diversity Indicesmentioning

confidence: 99%

Characterization of Nepalese rice (Oryza sativa L.) landraces for qualitative traits

Kharel

Subedi

Ghimire

et al. 2022

J. Agric. Nat. Res.

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The characterization of rice (Oryza sativa L.) landraces enables to identify phenotypically unique variables which certainly aid in rice breeding program. So, an experiment was conducted in alpha designed to characterize 188 rice landraces from NAGRC (National Agriculture Genetic Resources center) Nepal for their qualitative agromorphologies in research farm of Agriculture and Forestry University (AFU), Rampur, Chitwan in 2020 AD. Twenty-nine qualitative variables viz; twelve leaf characters, six culm characters, four panicle character and seven grain characters were observed and 26 characters revealed diverse trait expressions for each variable in experimented 188 rice accessions. Two leaf characters namely ligule colour and flag leaf attitude for early observation and one grain character (stigma colour for early observation) showed no variation among studied rice accessions. The intensity of green colour of leaf blade, culm lodging resistance and culm habit, secondary branching of panicle, and lemma and palea colour, lemma apiculus colour and sterile lemma colour, elucidated the higher variation in studied characters. The distinction revealed in qualitative characters approves the presence of abundant phenotypic diversity in the landraces assemblage and that eventually signifies the efficient and effective utilization of landrace in rice breeding programs.

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Section: Diversity Indicesmentioning

confidence: 99%

Characterization of Nepalese rice (Oryza sativa L.) landraces for qualitative traits

Kharel

Subedi

Ghimire

et al. 2022

J. Agric. Nat. Res.

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Assessment of on farm agrobiodiversity and its role in food sufficiency in mid hill, Nepal

Anjali¹,

Raj²,

Raj³

et al. 2023

Arch Food Nutr Sci

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A survey was conducted in the agricultural farms in Dhulikhel Municipality, mid-hill, Kavre, Nepal aiming at assessing the status of agrobiodiversity with the purpose of understanding its role in food security taking altogether 133 farming households scattered in several settlements with lowland, upland, and home garden being the general agricultural land use systems. Biodiversity index: Shannon-Wiener Index was used to assess diversity of plant. The main purpose was to assess the farm agrobiodiversity and to find out whether biodiversity level has a direct link to household food self-sufficiency. For descriptive analysis frequency, percentage, mean and standard errors were used. In the case of inferential statistics independent sample t - test and binary logistic was used to find the odd ratio of practicing home garden. The result showed that the average landholding size was 0.66 ha/household with 0.37 ha, 0.3 ha, and 0.06 ha being upland, low land, and home garden, respectively. A total of 136 plant species were documented out of which 74 were the effective number of species in the study area. Among the used plants, fodder shared 27% of the total plant diversity followed by fruit (21%), vegetable (19%), medicinal plants (8%), pulses (8%), spices (7%), oilseeds (5%) and cereals (5%). Similarly, the mean livestock unit (LSU) was 2.65. The overall Shannon-Wiener Index was 4.30 indicating high diversity of species and 87.7% of the species were evenly distributed. The Index was higher for vegetable (3.11) followed by fruits (2.9) and fodder (2.85). Higher diversity was found in fodder trees in lowlands whereas vegetable species were more diverse in upland and home garden. Similarly, the Index was 4.29 in the upland whereas it was 4.078 in the home garden followed by 3.13 in the lowland. The evenness was 0.899, 0.87, and 0.74 in upland, home garden and lowland, respectively. Higher species diversity revealed that the site was rich in agrobiodiversity. A significant positive correlation (0.22) was observed between Shannon-Wiener Index and farming years. Similarly, positive correlation (0.33) was found between an increase in the level of agrobiodiversity and food self-sufficiency. The result demonstrated that increasing crop diversity increases the household’s ability towards food sufficiency implying the need for the formulation and implementation of efficient policy to conserve the agrobiodiversity at municipality as well as national levels.

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Agrobiodiversity Indicators and Measurement using R for Description, Monitoring, Comparison, Relatedness, Conservation and Utilization

Cited by 2 publications

References 46 publications

Characterization of Nepalese rice (Oryza sativa L.) landraces for qualitative traits

Characterization of Nepalese rice (Oryza sativa L.) landraces for qualitative traits

Assessment of on farm agrobiodiversity and its role in food sufficiency in mid hill, Nepal

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