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

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Relation http://oar.icrisat.org/11578/
https://doi.org/10.1002/csc2.20245
doi:10.1002/csc2.20245
 
Title African and Asian origin pearl millet populations: Genetic diversity pattern and its association with yield heterosis
 
Creator Patil, K S
Gupta, S K
Marathi, B
Danam, S
Thatikunta, R
Rathore, A
Das, R R
Dangi, K S
Yadav, O P
 
Subject Plant Genetics
Plant Breeding
Pearl Millet
 
Description 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 relationship
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 separately
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 crossesweremixed) 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 correlation
between GD and panmictic midparent heterosis in any of the groups,
indicating that grain yield heterosis cannot be predicted based on GD. Two population
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.
 
Publisher Crop Science Society of America
 
Date 2020-06
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11578/1/16814170.pdf
Patil, K S and Gupta, S K and Marathi, B and Danam, S and Thatikunta, R and Rathore, A and Das, R R and Dangi, K S and Yadav, O P (2020) African and Asian origin pearl millet populations: Genetic diversity pattern and its association with yield heterosis. Crop Science (TSI). pp. 1-15. ISSN 0011-183X