期刊名称：Current Journal of Applied Science and Technology
印刷版ISSN：2457-1024
出版年度：2020
卷号：39
期号：10
页码：113-125
DOI：10.9734/cjast/2020/v39i1030635
语种：English
出版社：Sciencedomain International
摘要：Aims: The aim of the present work was to generate complete panicle emergence mutants ofSamba Mahsuri (BPT-5204), using the chemical mutagen, ethyl methane sulphonate (EMS)Place and Duration of Study: The field evaluation was carried out repeatedly in two locations atIndian Institute of Rice Research, Rajendranagar and at ICRISAT Patancheru Hyderabad. Theduration of the study was three successive seasons in triplicates namely, june-2014, january-2015and june-2015.Methodology: Seedlings of 28-30 days old were transplanted in 5 lines (each line containing 20plants) into the field. The plant spacing was 20 cm by 15 cm with density of one hill. The field wasirrigated throughout the experiment with average of 10 cm water above the soil level. Regular handweeding was embarked upon to free the plant of inter specific competition. The phenotypic datawas recorded for CPE mutants through visual assessment. The characteristics that requiredmeasurements were done according to the usual procedure. The Distinctness, Uniformity andstability of the CPE mutant lines have been recorded following (DUS) test guidelines by UPOVguidelines for rice (38) Yoshida S (44).Results: The identified stabilized thirteen complete panicle emergence (CPE) mutants showedsuperior agro morphological characters, compared with wild type (BPT-5204). The mutants CPE-2and CPE-3 took 100 days to flowering and CPE-4 and CPE-7 mutants showed superiority forpanicle length, and CPE-5 exhibited good performance for grain yield. In correlation analysis CPEtrait had a significantly positive correlation with PH and TGW and negative correlation with50%DFF. The CPE mutants used in the present study exhibited variability for most of the studiedtraits. Significant variation was detected in the identified stabilized CPE mutants for plant height,panicle length, flag leaf length and width, 50% flowering, different grain types and 1000 grainweight.Conclusion: The present study discovered adequate genetic divergence in the thirteen stabilizedCPE mutants for various qualitative and quantitative traits. The promising mutants identified duringthe current study have the potential to be used in future breeding programs for getting productiveand quality results.
