Improved Livelihoods, Genetic Diversity and Farmer Participation: A Strategy for Rice Breeding in Rainfed Areas of India

1988 ◽  
Vol 24 (3) ◽  
pp. 311-320 ◽  
Author(s):  
D. M. Maurya ◽  
A. Bottrall ◽  
J. Farrington
Keyword(s):  
Genetic Diversity ◽  
Plant Breeding ◽  
Alternative Strategy ◽  
Central Feature ◽  
Rice Breeding ◽  
Farmer Participation ◽  
Rice Varieties ◽  
New Varieties ◽  
On Farm ◽  
Traditional Rice

SUMMARYThe present structure of plant breeding and seed multiplication in India is highly centralized. Furthermore, only a small number of new varieties is officially released each year. The system therefore appears inappropriate for the requirements of the large proportion of Indian farmers located in risk-prone and highly diverse environments. An alternative strategy is described whose central feature is close matching of the characteristics of farmers' traditional rice varieties with those of advanced breeders' lines. A selection from these lines is then distributed in small quantities for on-farm trials managed by farmers themselves. If the success of these initial efforts is to be sustained, a more decentralized approach to breeding and multiplication will be necessary.

Analysis of On-farm Rice Yield Data from India

1992 ◽  
Vol 28 (3) ◽  
pp. 325-329 ◽  
Author(s):  
N. W. Simmonds ◽  
M. Talbot
Keyword(s):  
Plant Breeding ◽  
Rice Yield ◽  
Uttar Pradesh ◽  
Rice Varieties ◽  
Yield Data ◽  
Regression Slope ◽  
Rainfed Conditions ◽  
New Varieties ◽  
On Farm ◽  
Better Than

SummaryData recently published in this journal on grain yields of new rice varieties, grown under rainfed conditions on-farm in two villages in Uttar Pradesh, were analysed. The new varieties were spectacularly better than the landraces with which they were compared and showed a high regression slope (>2) against the landraces. If supported by further studies, such experiments could provide an appropriate, but hitherto unexplored, approach to plant breeding for poor, small farmers operating with low inputs.

PARTICIPATORY VARIETAL SELECTION IN LOWLAND SORGHUM IN EASTERN ETHIOPIA: IMPACT ON ADOPTION AND GENETIC DIVERSITY

2001 ◽  
Vol 37 (2) ◽  
pp. 211-229 ◽  
Author(s):  
E. MULATU ◽  
K. BELETE
Keyword(s):  
Genetic Diversity ◽  
Sorghum Bicolor ◽  
Selection Criteria ◽  
Farming System ◽  
Participatory Varietal Selection ◽  
Eastern Ethiopia ◽  
New Varieties ◽  
Seed System ◽  
Locally Grown ◽  
On Farm

Farmers' Participatory Varietal Evaluation (PVE) was conducted on sorghum (Sorghum bicolor) crops in the Kile-Bisidimo plains of eastern Ethiopia for three consecutive years, 1995–1997. The study aimed at providing farmers with alternatives to their landrace to enable them to overcome crop losses and to identify farmers' varietal selection criteria for inclusion in future breeding work. In 1995 constraints and opportunities in sorghum growing and farmers' varietal matching characteristics were identified through an informal survey. This was followed by a search for varieties and acquisitions of seed. Subsequently, eight varieties were evaluated of which five varieties were released and three were at the pre-release stage.In 1996 and 1997 farmer-managed on-farm trials were conducted and farmers evaluated the performance of the experimental varieties against a locally grown cultivar. Through pairwise and matrix ranking, farmers' selection criteria were listed, preferred varieties identified and initiatives taken to diffuse the varieties through the local seed system. Out of the eight varieties that research workers considered the best, farmers selected only three. The study negated the generally accepted view that farmers in lowland areas of eastern Ethiopia are reluctant to grow short-duration varieties. The selection and introduction of three new varieties into a farming system where farmers were growing only one local variety reconfirmed PVE to be a means for enhancing adoption and increasing genetic diversity. The study also confirmed that increasing farmers' access to their preferred varieties would result in a faster rate of diffusion through farmer-to-farmer seed exchange.

scholarly journals Evaluation of genetic diversity and DNA fingerprinting of 19 standard reference rice varieties using SSR markers

2020 ◽  
Vol 16 (4) ◽  
pp. 603-609
Author(s):  
Tran Long ◽  
Luu Minh Cuc ◽  
Nguyen Quang Sang ◽  
Pham Xuan Hoi
Keyword(s):  
Genetic Diversity ◽  
Dna Fingerprinting ◽  
Genetic Similarity ◽  
Similarity Coefficient ◽  
International Union ◽  
Rice Varieties ◽  
Reference Marker ◽  
High Uniformity ◽  
New Varieties ◽  
Group 2

Molecular markers are advanced-tools for identifying new varieties at DNA levels. According to the International Union for the Protection of New Varieties ofPlants,  new breeded varieties need to be tested for the Distinctness, Uniformity and Stability (DUS), before being recognized as the new ones. Traditional DUS criteria based on 62 - 65 morphological and biochemical characteristics, which evaluated on comparison of new varieties with 19 standard reference varieties for traits of interest.  Study on the genotypic polymorphism of 19 standard reference rice varieties provides genotypic information of these varieties for the evaluation of new rice varieties based on genotyping analysis.  The reference marker set (30 markers) was used to evaluate the genetic diversity and DNA fingerprinting of 19 standard reference rice varieties. The results showed the similarity coefficient of 19 varieties varied from 0.04 to 0.548. At the genetic similarity coefficient of 0.1, the 19 rice varieties divided into two main groups. Group one included 3 varieties: DH1, DH5, DH13. Group 2 included the remaining 16 varieties. Inside group two, phylogenetic tree divided into two main branches at the genetic similarity coefficient of 0.3. Branch 1 includes 5 varieties including DH2, DH6, DH10, DH11 and DH7. The 11 remaining varieties were in the branch 2. The most closely varieties were DH6 and DH10 with the genetic similarity coefficient of 0.548. This study shows that, the standard reference varieties have high uniformity and high genotypic polymorphism, could used for testing new varieties based on genotyping by DNA fingerprinting combining with phenotype.

Development of a core collection from Sri Lankan traditional rice (Oryza sativa) varieties for phenotypic and genetic diversity

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Shyama Weerakoon ◽  
Seneviratne Somaratne
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Sri Lanka ◽  
Core Collection ◽  
Morphological Characters ◽  
Morphological Features ◽  
Sri Lankan ◽  
Rice Varieties ◽  
Traditional Rice ◽  
Phenotypic And Genetic Diversity

Abstract. Weerakoon SR, Somaratne S. 2021. Development of a core collection from Sri Lankan traditional rice (Oryza sativa) varieties for phenotypic and genetic diversity. Nusantara Bioscience 13: 61-67. A collection of over 2000 traditional rice varieties are conserved at Gene Bank, Plant Genetics Resource Center, Sri Lanka. Oryza sativa varieties grown in Sri Lanka from ancient times to the middle of the last century are known as traditional rice. These varieties show adaptability to biotic and abiotic stresses and, an important component of biodiversity of Sri Lanka. A detailed understanding of the diversity of traditional rice varieties is essential for effective utilization of rice genetic resources and identification of potential parents possessing valuable genetic traits for future crop improvement. Study objectives were phenotypic and molecular characterization of one-hundred traditional rice varieties and to identify a core collection for phenotypic and genetic diversity. Rice varieties were grown in a plant house following RCBD with 4 replicates and 5 plants per replicate. Thirty-two agro-morphological characters were observed/collected. Genomic DNA was extracted from 20-days-old seedlings. Thirty?three microsatellite (Simple Sequence Repeat-SSR) primer pairs were used to assay genetic variation and PCR products were subjected to fragment analysis by capillary electrophoresis. Descriptive statistics and basic inferential statistical analyses were performed to access variation of agro-morphological characters among rice varieties. Cluster analysis and Multidimensional scaling produced 07 groups which were further analyzed using Classification and Regression Analysis to extract the diagnostic agro-morphological features. Groups of rice varieties were characterized by lemma palea color, awn color at maturity, seedling height, and flag-leaf angle. Traditional varieties represent distant clusters on agro-morphological features. Molecular analyses revealed all 33 loci displayed polymorphism (66.7-96.9%) among 100 traditional rice varieties with a total of 387 alleles identified with an average of 11.72 alleles per variety. All varieties were genetically structured into fifteen well-separated groups. UPGMA analysis based on Jaccard's similarity separated varieties into 05 major clusters. Genetic diversity information is useful in the efficient use of Sri Lankan rice germplasm and managing in situ and ex situ germplasm collections in conserving traditional rice varieties.

ASSESSING THE IMPACT OF PARTICIPATORY RESEARCH IN RICE BREEDING ON WOMEN FARMERS: A CASE STUDY IN EASTERN UTTAR PRADESH, INDIA

2008 ◽  
Vol 44 (1) ◽  
pp. 97-112 ◽  
Author(s):  
THELMA R. PARIS ◽  
ABHA SINGH ◽  
AMELIA D. CUENO ◽  
V. N. SINGH
Keyword(s):  
Participatory Research ◽  
Uttar Pradesh ◽  
Women Farmers ◽  
Rice Varieties ◽  
Participatory Varietal Selection ◽  
Farmer Adoption ◽  
New Varieties ◽  
Eastern Uttar Pradesh ◽  
On Farm ◽  
The Impact

SUMMARYThis paper assesses farmer adoption of rice varieties and new genotypes introduced through participatory varietal selection (PVS) in villages which represent submergence- and drought/submergence-prone villages in eastern Uttar Pradesh, India. It focuses on the involvement of women farmers in participatory research for screening improved varieties for areas which suffer from abiotic stresses. It further assesses the impact on the decision-making authority (or women's empowerment) on rice varietal choice, seed acquisition and disposal, and crop management after participating in PVS trials. It suggests strategies to empower women farmers in making sound and timely decisions on farm-related matters and to enhance their roles in accelerating the adoption of new varieties.

Protection of Indian Traditional Rice Varieties

2020 ◽  
pp. 158-181
Author(s):  
Moghanraj Yadhav G. ◽  
Balaguru Balakrishnan ◽  
Nagamurugan N.
Keyword(s):  
Genetic Diversity ◽  
Tamil Nadu ◽  
Delta Region ◽  
Indian Government ◽  
Rice Varieties ◽  
Crop Genetic Diversity ◽  
Patent Rights ◽  
Uniformity Test ◽  
Traditional Crops ◽  
Traditional Rice

The crop genetic diversity has been sustainably maintained by the farmers of different regions for generations through cross-breeding. Competition among commercial ventures has placed these traditional varieties under severe exploitation and pilferage. The Indian government, to preserve these traditional varieties, has established PPV and FRA (Protection of Plant Varieties and Farmers Rights Act), which are on par with Intellectual Patent Rights (IPR). This gives the rights and ownership of the crop breed and its characterization to the traditional farmers who developed it. The researchers along with VAANGHAI, an NGO, have represented the traditional farmers, who are growing and maintaining traditional crops in Cauvery River's coastal delta region in Tamil Nadu to characterize and register their varieties under PPV and FRA. This study has identified around 69 rice varieties and characterized them based on their uniqueness, distinctiveness, stability, uniformity, test trials, and adaptability potential. Most potential rice varieties were registered under this act.

scholarly journals Stress Tolerant Rice And On-Farm Seed Production Ensure Food Security And Livelihood To Small And Marginal Farmers Of Sundarbans (Indian Site)

2020 ◽  
Vol 17 (2) ◽  
pp. 127-139 ◽  
Author(s):  
K Chattopadhyay ◽  
S Gayan ◽  
I Mondal ◽  
SK Mishra ◽  
Ak Mukherjee ◽  
...  
Keyword(s):  
Food Security ◽  
Adverse Effects ◽  
Rice Cultivation ◽  
Great Promise ◽  
Seed Systems ◽  
Rice Varieties ◽  
The Poor ◽  
New Varieties ◽  
On Farm ◽  
Improve Food Security

Natural calamities have adverse effects on the life of marginal and small farmer practicing rice cultivation in Sundarban areas. Through discussion and questionnaires opinion of farmers were obtained that was applied to mitigate the problem of rice cultivation. Rice varieties tolerant to stagnant flooding, submergence and salinity had great promise to improve food security and livelihoods of the poor farmers of Sundarban area. The study revealed that small and marginal farmers accepted the new varieties very readily if seeds were produced locally. Informal seed systems had better promise for small and marginal farmers live in fragile ecosystem of Sundarban. SAARC J. Agri., 17(2): 127-139 (2019)

Rethinking the Farmer's Role in Plant Breeding: Local Bean Experts and On-station Selection in Rwanda

1993 ◽  
Vol 29 (4) ◽  
pp. 509-519 ◽  
Author(s):  
Louise Sperling ◽  
Michael E. Loevinsohn ◽  
Beatrice Ntabomvura
Keyword(s):  
Genetic Diversity ◽  
Plant Breeding ◽  
Breeding Programme ◽  
Research Station ◽  
Heterogeneous Environments ◽  
Home Environments ◽  
On Farm

SummaryVarietal selection is particularly difficult for very heterogeneous environments where farmers have a range of preferences. To address these issues in Rwanda, local bean experts, generally women, are invited to the research station to assess cultivars and to select those they prefer for their plots. Farmers use observed yield as only one of several criteria to predict varietal performance in their more stressed home environments. The varieties they choose are often higher yielding on-farm and are retained longer by farmers than those selected by the breeders. The results of early farmer involvement also compare favourably with those of the standard breeding programme in terms of enhanced genetic diversity and reduced research costs. There are few pre-conditions for developing such a client-driven breeding programme.Papel del agricultor en la selección de variedades para una estación inaestigación

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