Genetic divergence studies in Indian and exotic accessions of pearl millet

Lakshmana, D. and Biradar, B.D. and Deshapande, S.K. (2009) Genetic divergence studies in Indian and exotic accessions of pearl millet. Karnataka Journal of Agricultural Sciences, 22 (5). pp. 1080-1083.

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A study was conducted in Bijapur, Karnataka, India, during kharif 2005 to determine the genetic diversity among 105 accessions of pearl millet (26 from India and 79 from African countries, i.e. Togo, Sudan, Tanzania, Mali, Cameroon, Zimbabwe, Namibia, Nigeria, Burkina Faso, Ghana and 9 from ICRISAT) using cluster analysis based on 12 quantitative traits. Based on D2 values, the 105 genotypes were grouped in 22 clusters, indicating the presence of large amount of diversity among the genotypes. The maximum number of genotypes (63) was in cluster II; 10 were grouped in cluster III, 4 each in cluster I, XV and XVII. The most important traits contributing to the divergence was productive tillers per plant followed by days to maturity, grain yield per plant and 1000-seed weight. Genotypes in cluster VII, XIII, X, XV and VIII were the early maturing and cluster IX had the dwarf genotype. The cluster mean for ear length ranged from 15.67 to 29.80 cm, which were attained by group XXII and VI respectively. The maximum ear girth was noticed in cluster XVII (9.20) and more number of productive tillers per plant was seen in cluster XVIII (2.90). The highest mean grain yield per plant was recorded by the genotypes in cluster XIII (86.00 g), while the lowest in cluster IV (32.67 g). With respect to 1000-grain weight, cluster XIII had the highest mean value (13.70 g) followed by cluster X (12.63 g) and cluster I (11.28 g). The maximum diversity was observed between IP-9416 vs. ICTP-8203 followed by IP-5275 vs. IP-14644 and IP-8276 and IP-18742. These divergent pairs will make 'B' and 'R' line combinations at least on any one of the cytoplasmic male sterility sources. If such hybrids are good, the corresponding cytoplasmic sources can be used for developing male sterile version and utilized in hybridization programme for developing hybrids

Item Type: Article
Author Affiliation: Regional Agricultural Research Station, Bijpaur - 586 101, India
Subjects: Crop Improvement
Crop Improvement > Genetics/Genomics
Divisions: Millet
Depositing User: Mr B Krishnamurthy
Date Deposited: 14 Jul 2011 08:00
Last Modified: 14 Jul 2011 08:00
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