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African and Asian origin pearl millet populations: Genetic diversity pattern and its association with yield heterosis

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Title African and Asian origin pearl millet populations: Genetic diversity pattern and its association with yield heterosis
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Creator K. Sudarshan Patil
Shashi Kumar Gupta
Balram Marathi
Shashibhushan Danam
Ramesh Thatikunta
Abhishek Rathore
Roma Rani Das
Kuldeep Singh Dangi
Om Parkash Yadav
 
Subject African and Asian origin pearl millet populations
Genetic diversity pattern
Yield heterosis
 
Description Not Available
Pearl millet [Pennisetum glaucum (L.) R. Br.] is a staple food crop of arid and semi-arid regions of Asia and Africa. Forty-five pearl millet populations of Asian and African origin were assessed for genetic diversity using 29 simple sequence repeat (SSR) markers. The SSR-based clustering and structure analyses showed that Asian origin–Asian bred (As-As) and African origin–African bred (Af-Af) populations were distributed across seven clusters, indicating no strong rela- tionship among populations with their geographical origin. Most of the African origin–Asian bred (Af-As) populations had a higher average number of alleles per locus than As-As or Af-Af populations, and the majority of them clustered sepa- rately from As-As or Af-Af populations, indicating that introgression of African origin breeding materials led to the development of new gene pools adapted to the Asian region. Fourteen populations representing seven clusters were crossed according to a diallel mating design to generate 91 population hybrids (seeds of direct and reciprocal crosses were mixed) and evaluated at three locations in 2016. All the 91 hybrids when partitioned into three groups based on genetic distance (GD) between parental combinations (low, moderate, and high), revealed no cor- relation between GD and panmictic midparent heterosis in any of the groups, indicating that grain yield heterosis cannot be predicted based on GD. Two pop- ulation hybrids (GB 8735 × ICMP 87307 and Sudan I × Ugandi) exhibited high levels of yield heterosis over standard checks and can be further utilized using different breeding schemes to develop high-yielding pearl millet cultivars
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Date 2021-08-03T05:30:25Z
2021-08-03T05:30:25Z
2020-08-25
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/52443
 
Language English
 
Relation Not Available;
 
Publisher CROP SCIENCE