Download or read book Studies on Heterosis Combining Ability and Fertility Restoration of A2 Male Sterile Cytoplasm in Sorghum written by Desta Gebre and published by . This book was released on 1998 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on Fertility Restoration Heterosis and Combining Ability of A3 Male Sterile Cytoplasm in Sorghum sorghum Bicolor L Moench written by D. Narsaiah and published by . This book was released on 1994 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on Combining Ability Heterosis and Fertility Restoration in Sweet Stalk Sorghum Sorghum Bicolor L Moench written by NAIK S. B and published by . This book was released on 1993 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on Combining Ability Heterosis Fertility Restroation in Sweet Stalk Sorghum Sorghum Bicolor L Moench written by B. Naik Sunil and published by . This book was released on 1993 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Heterotic Relationships in Sorghum written by Krishnamoorthy Gabriel and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In sorghum, a predominantly self-pollinated crop, hybrid seed production relies exclusively on the cytoplasmic-genetic male sterility system. The system of hybrid development has caused sorghum breeding programs to develop two breeding groups: a male-parent group (R-line/ fertility-restorer) and a female-parent group (an A/B line, lacking the fertility-restoring gene of the A1 male-sterility system). These have served as heterotic groups in the absence of more information with reference to genetic diversity. Efforts to determine heterotic groups in sorghum have not been successful in clearly delineating any patterns. However, in a recent molecular marker-based study of 50 elite sorghum parental lines, groups similar to the working group system were observed, as was an absence of a consistent delineation, characteristic of heterotic groups, between the A/B- and R-lines. This study was conducted with the objective of evaluating the groups observed and assessing their potential as heterotic groups. Two parental lines from each of the five groups, and two lines from those not conforming to any group, were chosen and crossed in a half-diallel. The twelve parents, sixty-six diallel hybrids and three commercial hybrid checks were evaluated for grain yield and other agronomic traits in five environments' College Station, TX in 2003 and 2004, Weslaco, TX in 2003, and Halfway, TX in 2003 and 2004. Within-group crosses exhibited inferior heterotic expression, for grain yield and other traits, in comparison with across-group crosses. Furthermore, genetic similarity estimates for parental line pairs obtained from the molecular study were significantly correlated with specific combining ability and heterosis for yield of the corresponding hybrid combinations, revealing a pattern of correspondence between molecular data and heterosis. Hybrids made among R-lines and among B-lines were significantly lower in yield compared to AxR hybrids, likely to be a result of decades of breeding efforts to develop inbreds within the mutually isolated groups, rather than a consequence of phylogenetic divergence. An examination of the heterotic effects manifested in hybrid combinations reveals a pattern of interactions broadly in agreement with the molecular data, but differential responses between individual members of the proposed groups make it difficult to define distinct heterotic groups.
Download or read book Plant Male Sterility Systems for Accelerating Crop Improvement written by Abhishek Bohra and published by Springer Nature. This book was released on 2022-10-11 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers all aspects of hybrid breeding technologies applied for crop improvement in major field crops. The different male sterility systems such as genetic male sterility (GMS), cytoplasmic male sterility (CMS), cytoplasmic and genetic male sterility (CGMS), and male sterility induced by the photoperiod (PGMS), temperature (TGMS), and chemicals are discussed in detail. The different chapters in this book provide a timeline of the key breakthroughs witnessed in the field of plant male sterility technologies, their application in hybrid breeding, and the relevance to the current need for food security. In-depth insights into the genetic and regulatory mechanisms of plant male sterility have been presented. This includes discussion on a variety of molecular players that induce male sterility and rescue male fertility in the hybrid plants. To enhance this book’s appeal, more emphasis has been given on the modern emerging approaches such as construction of heterotic pools that could boost hybrid breeding for enhanced crop performance amid climate change and growing population worldwide. This book is a guide for growers and industries related to field and horticultural crops. Further, it is a useful reference for plant breeders, researchers and extension workers, and students. The material can also be used for teaching undergraduate and postgraduate courses.
Download or read book The Journal of the Iowa Academy of Science written by and published by . This book was released on 1989 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Breeding Abstracts written by and published by . This book was released on 1999 with total page 1664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Breeding written by H.K. Jain and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 813 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Indian Society of Genetics and Plant Breeding was established in 1941 in recognition of the growing contribution of improved crop varieties to the country's agriculture. Scientific plant breeding had started inIndia soon after the rediscovery of Mendel's laws of heredity. The Indian Agricultural Research Institute set up in 1905 and a number of Agricultural Colleges in different parts of the country carried out some of the earliest work mostly inthe form of pure-line selections. In subsequent years, hybridization programmes in crops like wheat, rice, oilseeds, grain legumes, sugarcane and cotton yielded a large number of improved cultivars with significantly higher yields. A turning point came in the 1960s with the development of hybrids in several crops including inter-specific hybrids in cotton. And when new germplasm with dwarfing genes became available in wheat and rice from CIMMYT and IRRI, respectively,Indian plant breeders quickly incorporated these genes into the genetic background of the country's widely grown varieties with excellent grain quality and other desirable traits. This was to mark the beginning of modem agriculture in India as more and more varieties were developed, characterized by a high harvest index and response to modem farm inputs like the inorganic fertilizers . India's green revolution which has led to major surpluses offood grains and othercommodities like sugar and cotton has been made possible by the work of one of the largest groups of plant breeders working in a coordinated network.
Download or read book Heterosis written by R. Frankel and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: When trying to solicit authors for this book it became apparent that the causal factors for heterosis at the physiological and biochemical level are today almost as obscure as they were 30 years ago. Though biometrical-genetical analyses point to dispersion of complementary genes - not overdominance - as the major cause of the phenomenon, plant breeders' experience still suggests a cautious, pragmatic approach to the dominance-overdominance controversy in breeding hybrid cultivars. Thus we are faced with a striking discordance between our limited comprehension of the causal factors and mechanism of heter osis on the one hand, and the extensive agricultural practice of utiliza tion of hybrid vigor on the other. Such utilization is the result of the economic value of hybrid combinations displaying superior yields and qualities as well as stability of performance, of benefits derived in breeding programs, and of the enhanced varietal protection of proprietary rights. No comprehensive and critical analysis of the phenomenon of heterosis in economic plants has been published for the last three decades since the now classical book Heterosis, edited by J . W. Gowen (Iowa State College Press, Ames, Iowa, 1952). The present book attempts to fill the gap and to assess the status of our present knowl edge of the concept, the basis, the extent, and the application of heterosis in economic plants.
Download or read book Pearl Millet Breeding written by I. S. Khairwal and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many advances have been made in the genetic improvement of pearl millet and this text is intended to fill the need for a comprehensive document which brings together principles and research results related to breeding and development activities.
Download or read book Sorghum Newsletter written by and published by . This book was released on 1984 with total page 1314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Sorghum and Millets Newsletter written by and published by . This book was released on 2001 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heterosis and Hybrid Rice Breeding written by Sant Singh Virmani and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rice is the most important food crop of the developing world and the demand for it is growing. Provided here is a concise account of hybrid breeding in rice, a newly deployed breeding approach to increase the yield. Research on heterosis, male sterility systems, outcrossing mechanisms, disease/insect management, and grain quality considerations in hybrid rice are reviewed. The book contains a wealth of useful information for practicing hybrid rice breeders, seed producers, researchers, and students of plant breeding.
Download or read book Breeding Oilseed Brassicas written by Kuldeep S. Labana and published by Springer Science & Business Media. This book was released on 2013-11-09 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present status of rapeseed-mustard crops as the third most important source of edible oils is attributable to the success of plant breeders and associate researchers in developing high yielding varieties with improved quality and resistance to biotic and abiotic stresses. However, the need to maximize the production gains and quality at lower economic costis greater than ever before. "Breeding Oilseed Brassicas" was thus conceived to review the past accomplishments in order to identify research gaps and suggest ways and means to meet the challenge of sustainable productivity upgradation. Theoretical and applied aspects ofbreeding, genetics, cytogenetics, crop physiology, and biotechnology are covered. The emphasis is on the application of theoretical knowledge to the solution of problems that confront the Brassica breeders.
Download or read book A Guide to Sorghum Breeding written by Leland R. House and published by . This book was released on 1982 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Plant Breeding written by Robert W. Allard and published by John Wiley & Sons. This book was released on 1999-05-10 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Die Pflanzenzucht enthält Elemente individueller und kultureller Selektion - ein Prozeß, den die langerwartete zweite Auflage hinsichtlich sowohl einzelner Pflanzen als auch kompletter Populationen unter die Lupe nimmt. Im Zuge der Aktualisierung des Stoffes wurden neue Themen aufgenommen: moderne Gewebekulturtechniken, molekularbiologische Verfahren, Aspekte der Wechselwirkung zwischen natürlicher und menschlicher Selektion und zwischen Genotyp und Umwelt sowie eine Reihe von Techniken zur Ertragssteigerung in ungünstigen Anbaugebieten. (05/99)
