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  • 1
    ISSN: 1573-5060
    Keywords: Pennisetum americanum ; pearl millet ; male-sterility ; male-fertility restorer ; male-sterility maintainer ; germplasm ; characterization ; geographic distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary To determine the distribution and geographic specificity of sterility maintainers in pearl millet, Pennisetum americanum (L.) Leeke, 428 diverse pearl millet germplasm accessions representing variation from 12 countries were crossed with a male-sterile line 5141A. The F1 hybrids were classified as male-fertile or male-sterile based on the seed set on bagged ear heads and an other morphology. Among these, 87 (20.3%) were classified as male-fertile, 32 (7.5%) as male-sterile, 282 (65.9%) as segregating for male-fertile/male-sterile and 27 (6.3%) behaved as male-fertile in the rainy and male-sterile in the postrainy season. Restorer lines were distributed in all the countries studied except Cameroon and USSR. Maintainer lines were observed from six countries but were concentrated in India. These maintainer lines differ from one another in several morphological and agronomic characters such as flowering, plant height, spike length and grain size. They may prove to be useful sources of material for generating new male-sterile lines. The restorers can be used to produce commercial hybrids.
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  • 2
    ISSN: 1573-5087
    Keywords: coleoptile length ; dwarf mutants ; gibberellin levels ; gibberellin sensitivity ; pearl millet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The concentrations of endogenous gibberellins (GAs) were determined by combined gas chromatography-mass spectrometry in shoots of five non-allelic dwarfs of pearl millet Pennisetum glaucum (L.) R. Br. One mutant (d3), with an extreme dwarf phenotype, was found to be deficient in all GAs measured; the others (d1, d2, d4 and the quantitatively inherited dwarf) had similar levels of GAs to the tall genotype. Only the GA-deficient dwarf recovered the tall phenotype in response to applying GA3 up to the adult stage, while the others showed slight to moderate responses at the seedling stage, depending on the season, and no response at later stages. The d1, d3 and d4 dwarfs had short coleoptiles. A wide range of coleoptile lengths with a normal distribution pattern was observed in the tall, d2 and the quantitatively inherited dwarf, suggesting that there is polygenic control of this trait.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Genetic resources and crop evolution 43 (1996), S. 173-178 
    ISSN: 1573-5109
    Keywords: Pennisetum glaucum ; collecting ; landraces ; wild relatives ; diversity ; variation ; characterization ; adaptation ; pearl millet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Pearl millet [Pennisetum glaucum (L). R. Br.] (syn. P. americanum (L.) Leeke) germplasm from Cameroon was collected jointly by the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) and the National Cereals Research and Extension Project (NCRE)/Institute of Agronomic Research (IAR), Maroua, Cameroon. Of the 1261 samples collected, 888 are pearl millet and 12 wild relatives of Pennisetums. A total of 918 accessions of pearl millet were evaluated during rainy and postrainy seasons at ICRISAT Asia Center (IAC), Patancheru, India, and 748 at Maroua, Cameroon. Considerable variation was observed for all the characters studies. At IAC, Patancheru, time to flower varied from 56 to 146 days with a mean of 114±0.62 days during the rainy and 46 to 128 days with a mean of 67±0.28 days during the postrainy season. At Maroua, the flowering time ranged from 49 to 112 days with a mean of 81±0.34 days. Plant height ranged from 230 to 450 cm with a mean of 353±1.52 cm. Spike and grain characters were more stable compared to flowering and plant height. The expression of spike characters was comparable to evaluation in postrainy season at IAC, Patancheru. In Cameroon, farmers classify pearl millet as Yadiri and Mouri, which vary for plant canopy, spike and grain characters. Mouri matures in about 95–110 days, extensively grown in the low rainfall areas of Extreme North province. Yadiri matures in 120–140 days, generally grown in the high rainfall areas of the North, Adamaoua provinces, and on the hill slopes of Extreme North province. Millet germplasm from Cameroon is a good source for more number of productive tillers, large compact spikes, and larger ivory and cream colored grain besides its potential for forage.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Genetic resources and crop evolution 43 (1996), S. 303-308 
    ISSN: 1573-5109
    Keywords: diversity ; evaluation ; landraces ; pearl millet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Most of the pearl millet (Pennisetum glaucum (L.) R. Br.) growing areas in Central African Republic (CAR) were explored by the GRD, ICRISAT in collaboration with the Ministry of Rural Development, CAR, Bangui and 129 pearl millet samples were collected during December 1988–January 1989. Considerable diversity was observed for several characters when 146 accessions including 17 collected by Institut francais de recherche scientifique pour le développement en coopération (ORSTOM) were evaluated at ICRISAT Asia Center (IAC), Patancheru. Time to flower ranged from 57 to 140 days with a mean of 128±1.1 days in rainy season and from 57 to 132 days with a mean of 73±0.8 days during postrainy season. Plant height ranged from 140 to 410 cm with a mean of 311±6.1 cm in the rainy season and from 75 to 310 cm with a mean of 155±2.6 cm during the postrainy season. The number of tillers varied between 1 to 6 per plant, spikes were mostly cylindrical and medium sized with a mean length of 20 cm during both seasons. They produced mostly gray or cream colored, globular grain, with partly corneous endosperm. Cluster analysis categorized accessions into similarity groups facilitating sampling a limited number of entries to represent the diversity of the pearl millet germplasm from Central African Republic.
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