Download or read book Genetic Variation and Covariation in Hybrids of New Restorer and Cytoplasmic Male Sterile Lines of Sorghum Sorghum Bicolor L Moench from the World Collection written by R. de P. NUNES and published by . This book was released on 1976 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetic varation was investigated among 16 new restorer lines (R-lines) selected from the World Sorghum Collection, and one chemically induced mutant and its normal sib, used as male parents, and 14 newly developed cytoplasmic male sterile lines (A-lines) and four standard commercial A-lines, used as female parents. The 18 R-lines were divide in two groups. The 16 lines from the World Sorghum Colletion were first randomly subdivided into two groups of eight. The two ramaining R-lines were added to each of the two groups of eight so that each of the two groups of males was composed of 10 lines. The eight new R-lines were referred to as random males because they were regarded as a random sample from a much larger number of phenotypically desirable R-lines that could be identified in the World Sorghum Collection. The induced mutant and its normal sib were called fixed males. Similarly, the 14 new A-lines were divided at random into two groups of seven. The four standard male sterile lines were added to each of the groups so that both groups of females had 11 lines. The 14 newly developed A-lines were called random females because they were regarded as a random sample from a much larger number of phenotypically desirable A-lines that could be developed from the World Sorghum Colletions. The four standard A-lines were called fixed females because they were deliberately closen. Each of the two groups of males was matched at random with one of the two groups of famales. As a result, two "AB" overall mating (...).
Download or read book Maintainer and Restorer Reaction with A1 A2 and A3 Cytoplasms of Lines from the Sorghum Converstion Program written by A. Bosques-Vega and published by . This book was released on 1989 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Diversity and Combining Ability Among Sorghum Conversion Lines written by Rafael Arturo Mateo Moncada and published by . This book was released on 2006 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of AFLP markers allowed the identification of five strong clusters through estimates of genetic similarities. This classification did not group the lines by either their genetic background or their fertility reaction. This study provides information to identify specific combinations that would help to understand heterotic relationships in sorghum, and support the suggestions made by Menz and Gabriel that races in sorghum are not well defined.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1977 with total page 756 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 1979 with total page 1244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Relationship Between Phenotypic Values in Male sterile Sorghum Parents and in Their F1 Hybrids written by R.R. Muyco and published by . This book was released on 1985 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirty grain sorghum (Sorghum bicolor (L.) Moench) hybrids were generated by crossing each of ten cytoplasmic male-sterile lines with three diverse tester lines. The parents and their hybrids were grown in four replications at the Central Experiment Station during the 1983-1984 dry season. The study aimed to determine the relationship between the male-sterile parents and their F1 hybrids, identify the appropriate male testers for evaluating the combinig ability of male-seterile parents, and identify sorghum hybrids with potential for comercial use. Agronomic characters measured included grain yield, days to 50% bloming, plant height, 1000-seed weight and average number of seeds per head. The analysis of vriance showed that parental lines as well as their F1 hybrids were all significantly different for the five characters measured. Parental lines contributed a major portion of the total variation. Grain yield was found to be the most heterotic character. Male-sterilie parents were highly correlated with their F1 hybrids for days to 50% blooming, plant height and average number of seeds per head. But F1 hybrids approached their male parent in days to 50% blooming and were generally taller than their parental lines. Correlation values for grain yield and 1000-seed weight were positive but not high enough to be significant. The top yielding male-sterilie lines were positive for general combining ability effects for yield, days to 50% blooming, and average number of seeds per head. These lines were ATX622, (...).
Download or read book Research Progress Report on Inheritance and Improvement of Protein Quality and Content in Sorghum Bicolor L Moench written by and published by . This book was released on 1973 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Studies Involving Diverse Sources of Cytoplasmic genetic Male Sterility in Sorghum Sorghum Bicolor L Moench written by BIRADAR B. D and published by . This book was released on 1995 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report on Inheritance and Improvement of Protein Quality and Content in Sorghum Bicolor L Moench written by and published by . This book was released on 1975 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agriculture Agronomy written by University Microfilms International and published by . This book was released on 1977 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A New Factor for Genetic Male Sterility in Sorghum Bicolor L Moench written by D. J. Andrews and published by . This book was released on 1972 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1975 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantitative Trait Loci Affecting the Agronomic Performance of a Sorghum Bicolor L Moench Recombinant Inbred Restorer Line Population written by Jorge Luis Moran Maradiaga and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Lately the rate of genetic gain in most agronomic crop species has been reduced due to several factors that limit breeding efficiency and genetic gain. New genetic tools and more powerful statistical analyses provide an alternative approach to enhance genetic improvements through the identification of molecular markers linked to genomic regions or QTLs controlling quantitative traits. The main objective of this research was to identify genomic regions associated with enhanced agronomic performance in lines per se and hybrid combination in Sorghum bicolor (L.) Moench. A population composed of 187 F5:6 recombinant inbred lines (RIL) was derived from the cross of restorer lines RTx430 and RTx7000. Also, a testcross hybrid population (TCH) was developed by using each RIL as a pollinator onto ATx2752. A linkage map was constructed using 174 marker loci generated from AFLP and SSR primer combinations. These markers were assigned to 12 different linkage groups. The linkage map covers 1573 cM with marker loci spaced at an averaged 9.04 cM. In this study, 89 QTL that control variation in seven different morphological traits were identified in the recombinant inbred line population, while in the testcross hybrid population, 79 QTL were identified. These traits included grain yield, plant height, days to mid-anthesis, panicle number, panicle length, panicle exsertion and panicle weight. These putative QTL explained from 4 to 42% of the phenotypic variation observed for each trait. Many of the QTL were not consistent across populations and across environments. Nevertheless, a few key QTL were identified and the source of the positive additive genetics isolated. RTx7000 was consistently associated with better agronomic performance in RIL, while in testcrosses, RTx430 was. Some genomic regions from RTx7000 may be utilized to improve RTx430 as a line per se. However, it is very unlikely that such regions will have a positive effect on the combining ability of RTx430 since testcross results did not reveal any transgressive segregants from the RIL population.
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 Analysis of Seed Set and Stigma Receptivity Among Cytoplasmic Male Sterile Sorghum Sorghum Bicolor L Moench Cultivars written by John Robert Jaster and published by . This book was released on 1985 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Stability Parameters Genetic Effects and Prediction of Performance in Single Three way and Double cross Hybrids of Sorghum Sorghum Bicolor L Moench written by George Anthony Ombakho and published by . This book was released on 1994 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Analysis of Yield and Its Components in Sorghum Sorghum Bicolor L Moench I Heterosis Combining Ability and the Nature of Genetic Variation in 9x9 Diallel Set II Heterosis Combining Ability and Components of Generation Means in A4x5 Line X Tester Set written by Patil R C. and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
