Characterization and Diversity Assessment of Nepalese Garlic (Allium sativum L.) Landraces

Abstract

A research was carried out at the field of National Agriculture Genetic Resources Centre (NAGRC), Khumaltar, Lalitpur, Nepal in 2019 with the objective of phenotypic characterization and genetic diversity assessment of thirty-seven local garlic landraces. The phenotypic diversity was assessed based on fifteen qualitative and nine quantitative characters by sing non replicated rod row design following the descriptors developed by IPGRI, 2001. Descriptive statistics were calculated by using MS Excel 2016 and UPGMA clustering and PCA was done with MINITAB-17. The diversity index (H’) and coefficient of variation for different traits ranged from 0.54-0.96 and 16.89-87.85, respectively. Four clusters identified and CO 10307, CO 10482 and CO 10615 of fourth clusters were superior in terms of quantitative characters. Five principal components contributed95.2% of the cumulative variance. This result will be helpful for breeder and researchers to comprehensively understand the agro-morphological characters as well as diversity of the Nepalese garlic collection.

Evaluation of Garlic Genotypes under Farmer’s Field Condition of Jumla, Nepal

“…Generally, the lowest number of cloves per bulb was recorded from medium to large sized cloves. Similar observations were made by different researchers [17,10,21] who reported that clove size had significant effects on the number of cloves per bulb.…”

“…The lowest diameter of bulb (29.06 mm) was obtained from ARM 02 followed by ARM 05 (29.18 mm) (Table 3). Similar type of variation of bulb diameter of different genotypes was also reported by Researcher [21].…”

Phenotypic characterization and diversity of Nepalese garlic (Allium sativum L.) landraces

“…The diversity index ranged from 0.64 (Bulb structure type, and Disease) up to 1.13 (Vigour). All six qualitative traits have high diversity index (H ≥0.60) (Eticha et al, 2005) confirming high genetic diversity among the garlic landraces in terms of qualitative phenotypic traits (Simon & Jenderek, 2003;Pooler & Simon, 1993;Thapa et al, 2021).…”

Characterization of Nepalese Bread Wheat Landraces Based on Morpho-Phenological and Agronomic Traits

“…Traditional varieties, also known as landraces, have highyield stabilityunder low-input agricultural systems and have the capacity to tolerate biotic and abiotic stresses despite having a lower yield than improved and hybrid varieties (Manohara et al, 2018). One of the primary causes of the low utilization of landraces is a lack of knowledge about particular characteristics of them (Thapa et al, 2021). In order to improve the use of specific traits in breeding programs, it is crucial to evaluate the diversity of wheat that is currently available.…”