Genetic Diversity of Field Mustard (Brassica Rapa L.) and Their Saturated and Unsaturated Fatty Acids Association

Abstract

The oilseed crop improvement for Brassica rapa L. (field mustard) is considered to be important in respect of yield production coupled with unsaturated fatty acids of the existing cultivars. Hence, the genetic diversity, and nutritional components of 14 B. rapa cultivars were evaluated based on their yield attributes and fatty acid profiles at the Sher-e-Bangla Agricultural University, Dhaka, Bangladesh. These 14 B. rapa cultivars differed significantly and were grouped into five diversified clusters. The highest intra-cluster distance was found in cluster II (2.43), while the highest inter-cluster distance was found between clusters II and V (20.41). In the fatty acid profile, the maximum threshold acceptable level (<7%) of saturated fatty acids for human consumption was found in Sonali Sarisha and BARI Sarisha-14. The total monounsaturated fatty acids viz., oleic, eicosenoic, and erucic acid ranged from 62.74% in BARI Sarisha-15 to 69.51% in Sonali Sarisha. The highest oleic acid and eicosenoic acid were obtained from the local variety, Maghi (21.06%) and Improved Tori (9.08%). The highest essential linoleic and linolenic acids were found in BARI Sarisha-15 (17.10%) and Improved Tori (8.16%), respectively. However, the local cultivar Maghi, containing the highest oleic acid (21.06%) has the lowest erucic acid (35.53%). On the other hand, BARI Sarisha-14 contained the lowest oleic (17.22%) and the highest erucic (44.02%) acids. The negative and strong correlation also reinforced the reverse relationship between oleic and erucic acids. Similarly, both linoleic (-0.497) and linolenic (-0.443) acids also showed a negative correlation with erucic acid. As a whole, BARI Sarisha-14, BARI Sarisha-15, Maghi, Sonali Sarisha, and Improved Tori could be selected as potential parents for a hybridization program to breed potential recombinant lines with higher oil content and healthier unsaturated oleic and linoleic fatty acids.

Nutrients and Growing Media Effect on Growth and Physiological Traits of Pak Choi Plants (Brassica Rapa L.)

“…It is due to the research results indicating that the chlorophyll a and b contents are not significantly dissimilar, whether given NPK 16:16:16 fertilizer, AB mix, or NASA organic fertilizer. However, the highest chlorophyll a and b contents, which are almost close in value, resulted when applying NPK 16:16:16 and AB mix fertilizer; thus, NPK 16:16:16 fertilizer can be an alternative to hydroponic nutrition for pak choi plants (Angming and Shen-Fushen, 2001;Rahman et al, 2022).…”

Effects of frass from larvae of black soldier fly (Hermetia illucens) and yellow mealworm (Tenebrio molitor) on growth and insect resistance in field mustard (Brassica rapa): differences between insect species and frass treatments

“…For instance, in Bangladesh, B. rapa serves as a major oilseed crop, contributing to approximately 70% of the total vegetable oil production. According to the latest available data, during the period 2017–2018, B. rapa was cultivated across 0.308 million ha, resulting in a total production yield of 351 537 metric tons of oilseed (Rahman et al., 2022). However, it is also a preferred host for various insect herbivores, including the root‐feeding larvae of the cabbage root fly, Delia radicum L. (Diptera: Anthomyiidae), and the shoot‐feeding larvae of the diamondback moth, Plutella xylostella L. (Lepidoptera: Plutellidae), which can cause substantial economic losses (Ahuja et al., 2010).…”

Recommendation of Stable Genotypes Based on Multiple Traits Across Multiple Environments in Brassica Rapa L.

“…Brassicaceae oilseeds are key producers of vegetable oil used for cooking and dietary needs on a global scale. The most popular and widely grown Brassica species for oilseed crops are B. napus, B. juncea and B. rapa (Rahman et al, 2022). Eventhough, B. napus, also known as rapeseed, has taken over as the primary oilseed crop, B. rapa cultivars with short duration and dwarf stature are still utilized as the best spring cultivars in late-frost regions like China, Northern Europe, and Canada.…”

“…Eventhough, B. napus, also known as rapeseed, has taken over as the primary oilseed crop, B. rapa cultivars with short duration and dwarf stature are still utilized as the best spring cultivars in late-frost regions like China, Northern Europe, and Canada. In Bangladesh and India, B. rapa is commonly grown as an oilseed crop (Rahman et al, 2022). Oilseed crops of B. rapa are frequently produced in Bangladesh and India.…”