This book covers the various aspects such as morphological characterization and evaluation of mungbean germplasm, laboratory evaluation of PHS resistance using various pod and seed parameters, Identification of PHS resistance/tolerant germplasm, study of association and direct and indirect effect of various characters on pre-harvest sprouting.
Mungbean [Vigna radiata (L.) Wilczek] is one of the important grain legumes of global economic importance. It requires hot and dry climate. Among the three seasons, kharif is most important and in this season pre-harvest sprouting (PHS) is a big problem causing huge losses in production. Nearly 60-70% of yield losses have been reported in green gram and black gram due to PHS. In view of the substantial losses caused by PHS, it is imperative to develop PHS tolerant varieties for yield improvement in mungbean. However, the information on these aspects is lacking because little work has been done on this crop.
Table of Contents
1. INTRODUCTION
2. REVIEW OF LITERATURE
3. MATERIALS AND METHODS
4. EXPERIMENTAL RESULTS
5. DISCUSSION
6. SUMMARY AND CONCLUSION
Research Objectives & Key Topics
This scientific investigation aims to evaluate the resistance of mungbean (Vigna radiata) germplasm to pre-harvest sprouting (PHS) by analyzing morphological, pod, and seed characteristics of 112 diverse genotypes to identify tolerant varieties for crop improvement.
- Morphological characterization of mungbean germplasm lines.
- Laboratory assessment of PHS resistance using pod and seed parameters.
- Identification of PHS-resistant or tolerant mungbean genotypes.
- Study of trait associations and path coefficient analysis for breeding effectiveness.
Excerpt from the Book
Screening of Mungbean (Vigna radiata) Germplasm for Pre-harvest Sprouting (PHS) Resistance
Keeping the above facts in mind, the present investigation entitled “Screening of Mungbean (Vigna radiata) Germplasm for Pre-harvest Sprouting (PHS) Resistance” was undertaken with the following objectives:
1) Morphological characterization and evaluation of mungbean germplasm.
2) Laboratory evaluation of PHS resistance using various pod and seed parameters.
3) Identification of PHS resistance/tolerant mungbean germplasm.
4) Study of association of pre-harvest sprouting with other characters and their direct and indirect effect on pre-harvest sprouting.
Summary of Chapters
1. INTRODUCTION: Provides an overview of the economic importance of mungbean, its origin, nutritional profile, and the significant yield losses caused by pre-harvest sprouting.
2. REVIEW OF LITERATURE: Examines previous research on pre-harvest sprouting mechanisms, moisture absorption traits, and the influence of pod characteristics on sprout resistance in legumes.
3. MATERIALS AND METHODS: Details the experimental design (Augmented Block Design) and laboratory methodologies used to evaluate 112 mungbean genotypes for various morphological and physiological traits.
4. EXPERIMENTAL RESULTS: Presents the statistical data, including ANOVA, variability estimations, trait associations, and path coefficient analyses regarding mungbean resistance.
5. DISCUSSION: Interprets the experimental findings, focusing on the genetic determinants of PHS resistance and the implications for future mungbean breeding programs.
6. SUMMARY AND CONCLUSION: Synthesizes the primary findings and identifies specific resistant and tolerant genotypes suitable for further development of pre-harvest sprouting resistant varieties.
Keywords
Mungbean, Vigna radiata, Pre-harvest sprouting, PHS resistance, Germplasm, Genetic variability, Path coefficient analysis, Crop improvement, Seed germination, Pod characteristics, Water absorption, Trait association, Augmented block design, Legumes, Agronomic traits.
Frequently Asked Questions
What is the primary scope of this work?
The research focuses on the genetic screening of mungbean germplasm to identify genotypes that show resistance to pre-harvest sprouting, a key factor causing significant losses in crop yield.
What are the central thematic fields covered?
The book covers morphological characterization, laboratory evaluation of resistance parameters, statistical assessment of genetic variability, and the study of trait association through correlation and path analysis.
What is the main objective of this study?
The primary objective is to select high-yielding mungbean germplasm with inherent resistance to pre-harvest sprouting to aid in future breeding and varietal development programs.
Which scientific methods are applied?
The study utilizes Augmented Block Design (ABD) and Randomized Block Design (RBD) for statistical evaluation, complemented by path coefficient analysis and correlation studies to determine trait contributions.
What does the main body consist of?
The main body comprises a detailed review of extant literature, comprehensive descriptions of field and laboratory materials and methods, the presentation of experimental results, and a critical discussion of the genetic findings.
What keywords characterize the study?
The study is characterized by terms such as Mungbean, Pre-harvest sprouting, Germplasm, Genetic variability, and Path coefficient analysis.
Why is the genotype Vigna radiata var sublobata specifically mentioned?
This wild progenitor was identified as the most highly resistant genotype among those tested, displaying significantly lower germination percentages in pod environments compared to others.
How does pod puberty influence sprouting?
The study indicates that higher pod pubescence acts as a physical barrier that minimizes water contact with the pod wall, thereby reducing water absorption and increasing resistance to pre-harvest sprouting.
What role does the residual factor play in the path analysis?
The residual factor represents the contribution of characters not included in the model; its value suggests that while key traits have been analyzed, additional variables could further clarify the complexity of PHS resistance.
- Quote paper
- Sarfraz Ahmad (Author), Vikas Belwal (Author), 2011, Pre-Harvest Sprouting in Mungbean. Screening Vigna radiata Germplasm and Correlation Study, Munich, GRIN Verlag, https://www.grin.com/document/1245070
