Deciphering the meiotic behaviour in species of genus Artemisia from Cold Deserts of Ladakh (Jammu &amp; Kashmir)

Tantray, Younas Rasheed; Singhal, Vijay Kumar; Gupta, Raghbir Chand

doi:10.1016/j.flora.2019.151520

Cited by 5 publications

(1 citation statement)

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“…Several genes act pre and post-meiotically to control the cytological stages of the cell cycle in germ cells. Mutagen induced alterations in any of these genes are deleterious and result in severe meiotic abnormalities that may impact the species viability and overall reproductive capacity [ 43 – 46 ]. Meiotic abnormalities lead to the formation of chromosomally imbalanced gametes, which ultimately affect the pollen and seed viability as stated previously by several workers [ 47 , 48 ].…”

Section: Discussionmentioning

confidence: 99%

Assessment of Bio-physiological damages and cytological aberrations in cowpea varieties treated with gamma rays and sodium azide

2023

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The assessment of mutagen induced biological damage forms an important study in determining the mutagenic potency and genotypic sensitivity, a vital aspect in mutation breeding programs. A prior assessment of lethal dose (LD50), mutagen induced biological damage (alterations in bio-physiological traits and frequency of cytological aberrations) is a prerequisite for determining an optimum mutagen dose in a successful mutation breeding experiment. Therefore, in a multi-year project of mutation breeding, two widely cultivated varieties of cowpea viz., Gomati VU-89 and Pusa-578, were treated with gamma (γ) rays and sodium azide (SA) doses. The results reflected a proportionate increase in bio-physiological damages with the increase in mutagenic doses and caused a substantial reduction in mean seed germination and seedling height. Different cytological aberrations such as cytomixis, univalents, chromosome stickiness, precocious separation, unequal separation, bridges, laggards, disturbed polarity, dyads, triads, and polyads were observed in both varieties. All the mutagen doses induced a broader spectrum of cytological aberrations with varying frequencies.

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Section: Discussionmentioning

confidence: 99%