Genetic and Agro-Morphological Diversity and Genotype by Environment Interaction of Yield and Nutritional Quality Traits in Pearl Millet Germplasm from Sudan


Book Description

Due to its adaptation to extremely harsh environments, pearl millet (Pennisetum glaucum (L) R. Br.) is one of the most important staple cereals cultivated in the arid and semi-arid tropics of Asia and Africa. In these regions pearl millet is mainly produced under low-input, rainfed conditions in traditional farming systems, where several constrains are affecting pearl millet production, such as inter-annual rainfall variability, pests, diseases, Striga and use of low yielding varieties. The majority of the human population in these regions is affected by nutritional deficiencies of essential minerals causing micronutrient malnutrition (so-called ‘hidden hunger’). Plant genetic resources provide basic materials for selection and improvement of crop productivity through the optimal design of breeding programs to meet food security needs of the world’s rapidly rising population. The advent of PCR-based molecular markers such as simple sequence repeats (SSRs) has created an opportunity for fine-scale genetic characterization of germplasm collections. Understanding the structure of diversity and the identification of distinct materials with complementary traits for recombination by crossing provides the foundation for effective and sustained pearl millet population breeding and synthetic and hybrid development, based on the concept of heterotic groups in this allogamous crop.







Genetic Diversity Analysis of Pearl Millet Hybrids Through Markers


Book Description

Pearl millet (Pennisetum glaucum (L.) R. Br.) is commonly known as pearl, cat tail, spiked or bulrush millet in English is world's sixth important and widely grown potential food cereal crop in agriculture in India and Africa. The pearl millet is an annual tillering diploid (2n=14), belongs to Division: magnoliophyta, Class: liliopsida, Order: poales, Family: Poacae, Sub family Paniceidae, Genus: pennisetum, Species: P. glaucum and is believed to be originated in Africa, where the greatest diversity of morphological types exists. The center of diversity for the crop is in the Sahel zone of West Africa.In pearl millet a large number of crosses evaluated in hybrids each year. The characterization and identification of cultivars/hybrids is an urgent requirement. However, all types of marker are not suitable or feasible for the characterization and identification of hybrids. Morphological markers are less useful mainly due to lack of availability of an adequate number of ideal morphological markers in several hybrids.Molecular and biochemical markers are important tool for breeding selection, genotype identification and studying the organization and evolution of plant genomes.




Results ...


Book Description

Twenty pearl millet genotypes representing hybrids, inbreds, popultion bulks,experimental varieties derived from populations and synthetics, along with a local check contributed by the cooperators, were tested in the IPMAT-2, 1976. Results were reported from 26 locations in 7 countries in the semi-arid tropics. The excellent support of cooperators is gratefully acknowledged. Data were received on grain yield, plant height, flowering, and disease incidence. Location summaries with statistical analyses are presented for each reporting site. Summary means over all locations are also presented for yield, plant height, days to 50% bloom and downy mildew. Results o stability analysis over 19 locations are also included. The hybrids with highest grain-yield averages over all locations were ICH 105, BK 560, ICH 13, and ICH 108. Among the populations, experimental varieties, and synthetics, Ex Bornu, WC-CX75, and Syn. 7601 gave good performances. Data from locations in West Africa and India indicate that Ex Bornu, PHB 14, WC-CX75, and NC-SX75 possess more "stable" resistance to downy mildew. The data support the view that this system of international evaluation provids an opportunity to locate areas of adaptation and identification of stable resistances to downy mildew.




Heterosis for Grain Yield Components in Pearl Millet (Pennisetum Glaucum (L.) R. Br.).


Book Description

An experiment comprised of five male sterile lines and 30 inbred testers of pearl millet and their 150 hybrids was conducted at millet breeding station, Center for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore during 2005-2007 for studying the extent of hybrid vigour in F1 for grain yield and its components. Highest and significant negative relative heterosis, heterobeltiosis and standard heterosis was observed in the cross ICMA 94111A x PT 5259 and the same combination showed negative relative heterosis, heterobeltiosis and standard heterosis for the trait plant height. The cross combination ICMA 94111A x PT 5423 showed higher magnitude of positive relative heterosis and heterobeltiosis for the trait total number of tillers. Highest and significant positive standard heterosis was recorded in ICMA 88004A x PT 5164 for total number of tillers. The hybrid cross combination ICMA 94111A x PT 5423 showed highest and significant relative heterosis, heterobeltiosis and standard heterosis for total productive tillers. The hybrid ICMA 88004A x PT 5181 recorded highest and significant positive standard heterosis for ear head length and 100 grain weight, ICMA 88004A x PT 5200 for ear head girth. 13 hybrids recorded highly significant standard heterosis for grain yield per plant. among 150 hybrids studied, seven hybrids namely ICMA 88004 A x PT 5164, ICMA 88004 A x PT 5200, ICMA 88004 A x PT 5232, ICMA 88004 A x PT 5130, ICMA 88004 A x PT 5173, 732 A x PT 5172 and ICMA 88004 A x PT 5809 were selected as best crosses since they expressed high standard heterosis over standard hybrid (MBH163) for many of the traits studied for high grain yield.










Pearl Millet Breeding for Grain Colour


Book Description

After release of first commercial hybrid in 1965, India witnessed a major breakthrough in total grain production and productivity of pearl millet. A large number of hybrids with high productivity potential are now available. However, so far as the grain quality and grain colour is concerned, no headway has been made in this direction. Quality of grain is also a complex character which is determined by genotype but also influenced by the environment. Particularly the environmental conditions during grain filling period affect the grain colour and quality drastically. For breeding white/grey grain coloured hybrids three basic requirements i.e. availability of genetic sources, genetics of grain colour and identification of stable genotypes are the most important ones. Keeping the above points factors into consideration, this book was written describing the genetic mechanisms and nature and magnitude of different types of gene actions involved in the inheritance of grain colour (grey & white) in pearl millet. It also describes the per se performance and stability for yield and its contributing traits in white and grey grain colour hybrids in pearl millet.