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      https://www.ias.ac.in/article/fulltext/jgen/099/0070

    • Keywords

       

      simple sequence repeat; principal co-ordinates analysis; analysis of molecular variance; population structure; cluster; barley.

    • Abstract

       

      This study was undertaken to measure the genetic diversity and population structure of 48 barley accessions introduced from ICARDA using 51 polymorphic simple sequence repeat (SSR) markers to select unique parents for breeding. The mean polymorphic information content was 0.491, suggesting high polymorphism for the selected SSR markers among the barley accessions. The populationstructure indicated a fine genetic base only with two major clusters. All accessions had 100% membership probability in their respective clusters. Analysis of molecular variance revealed that most (78%) of the variation was attributed between populations, while 22% was due to variation among individuals within populations. Neighbour-joining (NJ) tree was constructed using this distance matrix and two major clusters were observed in it. Cluster 1 had all hulled barley accessions and cluster 2 had all hulless barley accessions. Cluster 2 could befurther divided into three subclusters. Principal coordinates analysis results were similar to the NJ tree, where the hulled and hulless barley accessions were grouped into separate clusters. This study established the existence of considerable genetic diversity among the 48 tested accessions. The selected genetic resources will be useful for barley breeding in India and other countries.

    • Author Affiliations

       

      PAWAN KUMAR1 PRABHA BANJAREY1 REKHA MALIK2 A. N. TIKLE1 R. P. S. VERMA2 3

      1. Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior 474 002, India
      2. ICAR-Indian Institute of Wheat and Barley Research, Karnal 132 001, India
      3. International Centre for Agricultural Research in the Dry Areas (ICARDA), 10000 Rabat, Morocco
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