• Cytomorphological studies in x-ray induced glandless haploids inGossypium hirsutum L. (cotton)

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      https://www.ias.ac.in/article/fulltext/plnt/090/04/0313-0322

    • Keywords

       

      Induced haploidy; cytomorphological studies; Gossypium hirsutum L. cotton

    • Abstract

       

      Six haploid plants were obtained in M2 generation of the 25 kr. x-ray irradiatedGossypium hirsutum L. cotton variety H.G. 108. The cytomorphological studies on these plants indicated highly irregular meiosis, giving on an average six bivalents, the range being 0–9. Unequal separation of chromosomes and chromatids at anaphase-I and II respectively led to formation of abnormal tetrads and pollens with high size variations leading to high pollen sterility. These plants were characterized by miniature stature, shorter stem and internodes, smaller leaves, flowers and stomata with fewer chloroplasts, male and female sterility and halving of chromosomes. The reduction in morphological characters was nearly in the proportion of 1∶2 as compared to their diploid counterparts.

    • Author Affiliations

       

      S S Mehetre1 2 M V Thombre1

      1. All India Co-ordinated Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Dist. Ahmednagar, Rahuri - 413 722, India
      2. Department of Botany, Mahatma Phule Agricultural University, Rahuri, India
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