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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
general
Discerning combining ability loci for divergent environments using chromosome segment substitution lines (CSSLs) in pearl millet
PLoS ONE, Volume 14, No. 8, Article e0218916, Year 2019
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Description
Pearl millet is an important crop for arid and semi-arid regions of the world. Genomic regions associated with combining ability for yield-related traits under irrigated and drought conditions are useful in heterosis breeding programs. Chromosome segment substitution lines (CSSLs) are excellent genetic resources for precise QTL mapping and identifying naturally occurring favorable alleles. In the present study, testcross hybrid populations of 85 CSSLs were evaluated for 15 grain and stover yield-related traits for summer and wet seasons under irrigated control (CN) and moisture stress (MS) conditions. General combining ability (GCA) and specific combining ability (SCA) effects of all these traits were estimated and significant marker loci linked to GCA and SCA of the traits were identified. Heritability of the traits ranged from 53–94% in CN and 63–94% in MS. A total of 40 significant GCA loci and 36 significant SCA loci were identified for 14 different traits. Five QTLs (flowering time, panicle number and panicle yield linked to Xpsmp716 on LG4, flowering time and grain number per panicle with Xpsmp2076 on LG4) simultaneously controlled both GCA and SCA, demonstrating their unique genetic basis and usefulness for hybrid breeding programs. This study for the first time demonstrated the potential of a set of CSSLs for trait mapping in pearl millet. The novel combining ability loci linked with GCA and SCA values of the traits identified in this study may be useful in pearl millet hybrid and population improvement programs using marker-assisted selection (MAS). © 2019 Basava et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Authors & Co-Authors
Basava, Ramana Kumari
India, Patancheru
International Crops Research Institute for the Semi-arid Tropics
Hash, Charles Tom
India, Patancheru
International Crops Research Institute for the Semi-arid Tropics
Mahendrakar, Mahesh D.
India, Patancheru
International Crops Research Institute for the Semi-arid Tropics
Kavi Kishor, Polavarapu Bilhan
India, Hyderabad
Osmania University
Tara Satyavathi, Chellapilla
India, New Delhi
Indian Council of Agricultural Research
Kumar, Suśhil
India, Patancheru
International Crops Research Institute for the Semi-arid Tropics
India, Anand
Anand Agricultural University
Singh, Ram Baran
India, Patancheru
International Crops Research Institute for the Semi-arid Tropics
Yadav, Rattan S.
United Kingdom, Aberystwyth
Aberystwyth University
Gupta, Rajeev R.
India, Patancheru
International Crops Research Institute for the Semi-arid Tropics
Srivastava, Rakesh Kumar
India, Patancheru
International Crops Research Institute for the Semi-arid Tropics
Statistics
Citations: 8
Authors: 10
Affiliations: 5
Identifiers
Doi:
10.1371/journal.pone.0218916
ISSN:
19326203
Research Areas
Genetics And Genomics
Health System And Policy
Study Design
Cross Sectional Study