Home » Agriculture » QUALITY AND GENETIC EVALUATION OF SOME GENOTYPES OF RICE (Oryza sativa L.) USING...
QUALITY AND GENETIC EVALUATION OF SOME GENOTYPES OF RICE (Oryza sativa L.) USING DIALLEL METHOD
Sold By: Joe Project Store | Item Type: Project Material | Report this? | Attributes: 50 pages | 1-5 chapters | Amount: ₦5,000 | Marked useful: 4,935 times
Delivery: Within 24 hours
QUALITY AND GENETIC EVALUATION OF SOME GENOTYPES OF RICE (Oryza sativa L.) USING DIALLEL METHOD
ABSTRACT
The patterns of gene effects on agronomic and some quality traits of eight genotypes of
rice (Oryza sativa L.) and their progenies were studied using Diallel analysis method 1
involving parents, F1 hybrids and their reciprocals. The eight genotypes studied were
selected for their agronomic performance and protein content from thirty genotypes
evaluated in a randomized complete block design and replicated three times at the
Teaching and Research Farm of the Federal University of Technology, Owerri, Nigeria
during the planting seasons of 2005 and 2006. The results of the Diallel analysis
conducted during the 2007 planting season indicated larger magnitude of additive
components of variance in attributes like number of tillers per plant, number of days to
anthesis, panicle length , number of secondary branches per panicle, 1000-seed weight,
grain width and grain length/grain width ratio. Non-additive variance was more important
for plant height at flowering, number of seeds per secondary branch of panicle, grain
length and percentage protein content. The nature and magnitude of general combining
ability(GCA) and specific combining ability(SCA) effects, as well as the direction of
heterosis assessed by the SCA effects, seemed to differ for different traits and various
cross combinations. No parental line consistently had negative SCA effects for all the
traits.
Additive gene effects with high GCA values could be exploited in WITA 4 and
Max for higher tillering ability, NERICA 1, Fofifa 16 and WAB 96-1-1 for earliness;
WITA 4 and NERICA 1 for production of hybrids for greater number of secondary
branches per panicle; CT 7127-49 and EMPASC 105 for development of hybrids with
greater number of spikelets per panicle; NERICA 1, CT7127-49 and EMPASC 105 for
producing hybrids with more fertile grains; CT7127-49 and NERICAI for developing
progenies with more seeds per secondary branch of panicle; IR57689-73 and Fofifa 16
for 1000-seed weight and CT 7127-49 and WITA 4 for developing long and fine grains.
WITA 4 and EMPASC 105 were observed to be semi-dwarfs and offer themselves as
candidate genotypes for reduction of plant height to reduce stem lodging and increase
yield. The phenotypic generation means of the parental lines (P1 and P2), F1 and
reciprocal cross and the BC1 and BC2, evaluated during the 2009 planting season for the
study on genetic effects of the characters on the breeding lines generated, indicated that
the F1 generation means were higher than their mid-parent values especially for
percentage protein content. The F1 and F2 generation means were not significantly
different in the majority of the cases except for lowland x upland and upland x lowland
hybrids for percentage fertile spikelets and numbers of spikelets per panicle. Varied
genetic effects were observed on the characters for generation mean analysis on six
parameter model. Additive and dominance as well as epistatic gene effects were involved
in the inheritance of most characters. Digenic interactions were significant for most of the
traits. Presence of significant dominance effect combined with duplicate epitasis
restricted the scope for simple selection for most of the characters. Reciprocal and
maternal effects were also implicated for most of the traits.
This material content is developed to serve as a GUIDE for students to conduct academic research
Delivery: Within 24 hours
Advertise Here
Not what you were looking for? Perform a search
What's your project topic?
Comment on Facebook:
Related Project Materials
- 1.
ASSESSMENT OF INDIGENOUS FARMERS PERCEPTION OF CLIMATE CHANGE IN NORTH CENTRAL PART OF NIGERIA
CHAPTER ONE INTRODUCTION 1.1 Background of the Study One of the continents most susceptible to both climate variability and change is Africa. Farme...More »
Item Type: Project Material | 54 pages | 675 engagements |
- 2.
THE IMPACT OF AGRICULTURAL POLICIES ON NIGERIAN ECONOMY
THE IMPACT OF AGRICULTURAL POLICIES ON NIGERIAN ECONOMY CHAPTER ONE INTRODUCTION 1.1 Background to the Problem Agriculture in the context of the eco...More »
Item Type: Project Material | 55 pages | 0 engagements |
- 3.
THE IMPACT OF AGRICULTURAL DEVELOPMENT PROGRAMMES ON THE ECONOMY
THE IMPACT OF AGRICULTURAL DEVELOPMENT PROGRAMMES ON THE ECONOMY CHAPTER ONE INTRODUCTION 1.1 Background of the Study Agriculture is the foundation an...More »
Item Type: Project Material | 60 pages | 0 engagements |
- 4.
THE EFFECT OF MONETARY POLICY ON AGRICULTUTRAL OUTPUT IN NIGERIA
THE EFFECT OF MONETARY POLICY ON AGRICULTUTRAL OUTPUT IN NIGERIA CHAPTER ONE INTRODUCTION 1.1 Background of the Study The...More »
Item Type: Project Material | 55 pages | 1,677 engagements |
- 5.
THE ECONOMIC PROBLEMS OF CASSAVA PRODUCTION
THE ECONOMIC PROBLEMS OF CASSAVA PRODUCTION CHAPTER ONE INTRODUCTION 1.1 Background of the study This study is aimed at finding out the c...More »
Item Type: Project Material | 50 pages | 0 engagements |
- 6.
THE CONTRIBUTION OF AGRICULTURE COOPERATIVE SOCIETIES TO FOOD PRODUCTION (A Case Study Selected Agr...
THE CONTRIBUTION OF AGRICULTURE COOPERATIVE SOCIETIES TO FOOD PRODUCTION (A Case Study Selected Agricultural Cooperative Societies In Enugu North Lo...More »
Item Type: Project Material | 55 pages | 1,773 engagements |