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Latitudinal patterns of diversity in the world collection of pearl millet landraces at the ICRISAT genebank

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Relation http://oar.icrisat.org/7068/
http://dx.doi.org/10.1017/S1479262113000348
10.1017/S1479262113000348
 
Title Latitudinal patterns of diversity in the world collection of pearl millet landraces at the ICRISAT genebank
 
Creator Upadhyaya, H D
Reddy, K N
Singh, Sube
Gowda, C L L
Irshad Ahmed, M
Ramachandran, S
 
Subject Millets
Genetics and Genomics
 
Description The genebank at ICRISAT, Patancheru, India conserves a total of 19,063 pearl millet landraces from latitudes ranging from 33.00° in the Southern Hemisphere (SH) to 34.37° in the Northern Hemisphere (NH). In the present study, the NH was found to be the major region for growing pearl millet landraces (80.5%). More landraces were found at lower latitudes ( < 20°) in both hemispheres than at higher latitudes. The latitude range of 10°–15° in the NH and 15°–20° in the SH were found to be important source regions for the prevalence of pearl millet, with 39.6% and 13.1% in the world collection of landraces, respectively. Landraces from lower-latitude regions on either side of the equator varied widely for all traits. Landraces from the 5°–10°N latitude region flowered late and grew tall in the rainy and post-rainy seasons and produced more tillers. Landraces from the 10°–15°N latitude region produced few tillers and had long and thick panicles with larger seeds. Long-bristled bird-resistant landraces were considerable at latitudes of 10°–15°S and 20°–25°S. The minimum temperature at the collection sites was found to be one of the important factors for determining the patterns of the prevalence of pearl millet across the latitudes. Late-maturing, tall and high-tillering landraces from lower-latitude regions were better sources for fodder production. Early-maturing landraces producing long and thick panicles with large seeds from mid-latitude regions (15°–20°) in both hemispheres were useful for developing high-yielding cultivars. Using the latitudinal patterns of diversity in pearl millet landraces, missions may be launched to explore high-diversity, under-collected and threatened areas for the collection of materials of interest at latitudes of 15°–20°.
 
Publisher Cambridge University Press
 
Date 2014
 
Type Article
PeerReviewed
 
Format application/pdf
image/jpeg
application/msword
application/msword
application/pdf
 
Language en
en
en
en
en
 
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Identifier http://oar.icrisat.org/7068/1/Latitudinal_upadhyaya_et.al.pdf
http://oar.icrisat.org/7068/2/Figure%20S1.jpg
http://oar.icrisat.org/7068/3/Tables_1-4.docx
http://oar.icrisat.org/7068/4/Tables-S1-S2.docx
http://oar.icrisat.org/7068/16/Latitudinal%20patterns%20of%20diversity%20in%20the%20world%20col.pdf
Upadhyaya, H D and Reddy, K N and Singh, Sube and Gowda, C L L and Irshad Ahmed, M and Ramachandran, S (2014) Latitudinal patterns of diversity in the world collection of pearl millet landraces at the ICRISAT genebank. Plant Genetic Resources, 12 (1). pp. 91-102. ISSN 1479-263X