Study of genetic diversity in rapeseed and mustard germplasm by using cluster analysis

Raza, Irum; Masood, M. A.; Abid, Saleem; Rani, Saima; Zahra, Naheed; Abbas, Haider

doi:10.15406/jabb.2019.06.00199

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…Sharma et al: Genetic study of terminal heat stress in Indian mustard stability index and 1000 seed weight under heat stress conditions. Raza et al (2019) reported positive correlation of yield component with morphological characters studied. Lakra et al (2020) reported that yield per plot showed positive and significant correlation with days to 50% flowering, days to maturity, siliquae/ plant, siliqua length and seeds/silique.…”

Section: O N L I N E C O P Ymentioning

confidence: 89%

Genetic study of terminal heat stress in indigenous collections of Indian mustard (Brassica juncea L.) germplasm

Sharma¹,

Singh²,

Kumar³

et al. 2022

JEB

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Aim: The present study was carried out to evaluate 145 genotypes of Indian mustard for terminal heat stress under late sown irrigated conditions. Methodology: One hundred and forty five genotypes of Indian mustard were evaluated for terminal heat tolerance, along with six checks in augmented block design. The effect of heat stress was assessed on different agro-morphological traits. Data were recorded on five randomly selected plants for 12 different quantitative traits for each genotype. Results: Terminal heat stress caused significant reduction in performance of all traits, except oil content and fruiting zone length. Seed yield per plant showed highest reduction (33.92%) followed by 1000-seed weight (21.28%). Thousand-seed weight and secondary branches per plant were found associated with seed yield under late sown conditions. Based on yield under stress, yield index, geometric mean productivity and stress tolerance indices, five lines viz., DRMR-59, DRMR-2094, DRMR-2129, DRMR-2071, DRMR-2136 were identified as high yielding and terminal heat stress tolerant. Whereas, based on heat stress susceptibility index, DRMR-1347, DRMR-1154, DRMR-1190 were top performing lines tolerant to terminal heat stress. Interpretation: Selection of high yielding lines under stress condition can be done using correlated traits. Yield under stress was found significantly correlated with YSI, YI, MP, STI and GMP suggesting to use these indices for selection of high yielding and heat tolerant lines. However, further re-validation is very much needed for effective use of these indices for selection of heat tolerant lines in Indian mustard.

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Section: O N L I N E C O P Ymentioning

confidence: 89%

Genetic study of terminal heat stress in indigenous collections of Indian mustard (Brassica juncea L.) germplasm

Sharma¹,

Singh²,

Kumar³

et al. 2022

JEB

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“…There are several reports on the use of cluster analysis to identify genetic similarities between rapeseed cultivars. The dendrogram structure allows further interpretation and visualisation than other examinations (Prasad et al, 2009;Raza et al, 2019). This experiment was conducted to study the biochemical parameters of the best rapeseed cultivars of Iran under different sowing dates and drought stress at the flowering stage.…”

Section: Highlightsmentioning

confidence: 99%

Grain yield and associated physiological traits of rapeseed (<em>Brassica napus L.</em>) cultivars under different planting dates and drought stress at the flowering stage

et al. 2020

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The adverse effects of abiotic stresses have always restricted oilseed crop production, particularly in arid and semi-arid regions. On the other side, global climate change has led us to adapt planting dates and select tolerant cultivars to encounter the new climatic conditions. To evaluate the effect of late-season drought stress under different planting dates on rapeseed cultivars, an experiment was conducted as a factorial split-plot based on randomized complete block design in Karaj region- Iran, during 2015-2017. Planting date and irrigation treatments were considered in the main plots as factorial and cultivars were placed in subplots. Two planting dates were regular date (October 7) (PD1) and late planting date (November 6) (PD2). Irrigation was also carried out at two levels of normal irrigation (NI) and irrigation interruption from flowering stage onwards (II). Experimental cultivars included ES Hydromel, ES Alonso, ES Darko, ES Lauren, and Ahmadi. According to the results, late-season drought stress and delayed planting date reduced leaf relative water content (LRWC), total chlorophyll content (TCC), proline (LPC), and grain yield (GY), and increased stomatal resistance (SR), canopy temperature (CT), and leaf soluble carbohydrates (CLS) in rapeseed cultivars. The highest grain yield (4505.6 kg ha-1) was obtained in NI conditions and PD1. Significant interactions of planting date, irrigation, and cultivar on LRWC, SR, and CLS traits indicated that the ES Hydromel was the most tolerant hybrid cultivar with the highest LRWC and the lowest SR and CLS levels compared to other ones in unfavorable conditions of late-season drought stress and delayed planting. To confirm these results, cluster analysis led to the formation of two clusters, where ES Darko, Ahmadi, and ES Lauren cultivars were placed in the sensitive cluster and ES Hydromel and ES Alonso cultivars were assigned to the tolerant cluster. Therefore, ES Hydromel can be introduced as a superior cultivar to be selected as a genotype that presents acceptable resistance under drought stress and late sowing in arid and semi-arid regions.

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Study of genetic diversity in rapeseed and mustard germplasm by using cluster analysis

Cited by 2 publications

References 4 publications

Genetic study of terminal heat stress in indigenous collections of Indian mustard (Brassica juncea L.) germplasm

Genetic study of terminal heat stress in indigenous collections of Indian mustard (Brassica juncea L.) germplasm

Grain yield and associated physiological traits of rapeseed (<em>Brassica napus L.</em>) cultivars under different planting dates and drought stress at the flowering stage

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