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Diversity and gaps in Pennisetum glaucum subsp. monodii (Maire) Br. germplasm conserved at the ICRISAT genebank

Published online by Cambridge University Press:  16 December 2013

H. D. Upadhyaya ,
K. N. Reddy ,
Sube Singh ,
C. L. L. Gowda ,
M. Irshad Ahmed  and
Vinod Kumar
H. D. Upadhyaya*
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Grain Legumes Program, Genetic Resources, Patancheru, Andhra Pradesh502 324, India
K. N. Reddy
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Grain Legumes Program, Genetic Resources, Patancheru, Andhra Pradesh502 324, India
Sube Singh
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Grain Legumes Program, Genetic Resources, Patancheru, Andhra Pradesh502 324, India
C. L. L. Gowda
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Grain Legumes Program, Genetic Resources, Patancheru, Andhra Pradesh502 324, India
M. Irshad Ahmed
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Grain Legumes Program, Genetic Resources, Patancheru, Andhra Pradesh502 324, India
Vinod Kumar
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Grain Legumes Program, Genetic Resources, Patancheru, Andhra Pradesh502 324, India
*
* Corresponding author. E-mail: [email protected]
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Abstract

The International Crops Research Institute for the Semi-Arid Tropics conserves 335 accessions of Pennisetum glaucum subsp. monodii originated in 13 countries. In the present study, the collection was evaluated and assessed for diversity and geographical gaps. A wide variation was observed in the collection for total tillers per plant (16 to 609), productive tillers per plant (12 to 368), leaf length (21.3 to 58.8 cm) and leaf width (8.1 to 33.1 mm), indicating high fodder yield potential of the collection. The accessions of cluster 3 flowered late, grew tall with thick stems and long and broad leaves, and differed significantly from those of cluster 1 and cluster 2. The accessions of cluster 2 were found to be promising for tillering. The highly significant positive correlation (r= 0.944) between total and productive tillers per plant suggests that the selection for total tillers will result in selection for productive tillers. A total of 354 districts located in 86 provinces of eight countries in the primary centre of origin for pearl millet were identified as geographical gaps. The probability map generated using FloraMap in the present study matched quite closely to the origin of pearl millet, supporting the prediction of P.glaucum subsp. monodii occurrence in the primary centre of diversity for pearl millet. The high fodder yield potential of P.glaucum subsp. monodii germplasm and low intensity of collection in countries under study suggest the need for launching germplasm collection missions, exclusively for pearl millet wild relatives to fill taxonomic and geographical gaps in the collection.

Keywords

crop wild relativesdiversitygermplasmprobabilityvariation
Type
Research Article
Information
Plant Genetic Resources , Volume 12 , Issue 2 , August 2014 , pp. 226 - 235
Copyright
Copyright © NIAB 2013 

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