Using survey dataset collected from nearly 9000 farmers along with pedigree and evaluation data, this study measures the contribution of the International Rice Genebank (IRG) to varietal improvement and rice productivity of farmers in Eastern India. We empirically test the relationship of ancestry to productivity changes while controlling for the effects of other farm inputs and environmental factors. Estimated coefficients indicate that a 10% increase in the genetic contribution of IRG accessions to an improved rice variety is associated with a yield increase of 27%. Through pedigree analysis, we also confirm that 45 to 77% of the genetic composition of improved rice varieties is derived from the genes of IRG accessions. Peta, Dee Geo Woo Gen, and Fortuna are the three most popular progenitors with definite IRG contribution. High genealogical diversity likely results from the crossing of germplasm received from multiple countries of origin, which also confer multiple, functional trait combinations in a released variety. Further, our calculations reveal that the average coefficient of parentage of all pairwise combinations among the 10 most adopted rice varieties is 0.0973, indicating a high degree of latent genetic diversity. Findings demonstrate the valuable contribution of the genetic resources conserved and distributed by IRG to the development of improved rice varieties.

中文翻译：

---

国际水稻基因库对印度东部品种改良和作物生产力的贡献

本研究使用从近 9000 名农民收集的调查数据集以及谱系和评估数据，衡量国际水稻基因库 (IRG) 对印度东部农民的品种改良和水稻生产力的贡献。我们在控制其他农场投入和环境因素的影响的同时，凭经验测试了祖先与生产力变化的关系。估计系数表明，IRG 种质对改良水稻品种的遗传贡献增加 10% 与产量增加 27% 相关。通过系谱分析，我们还确认改良水稻品种的遗传组成中有 45% 到 77% 来自 IRG 种质的基因。Peta、Dee Geo Woo Gen 和 Fortuna 是三个最受欢迎的具有明确 IRG 贡献的祖先。高谱系多样性可能源于从多个原产国获得的种质杂交，这也赋予已发布品种多种功能性状组合。此外，我们的计算表明，10 个最常用的水稻品种中所有配对组合的平均亲本系数为 0.0973，表明潜在的遗传多样性程度很高。调查结果表明，IRG 保存和分配的遗传资源对水稻改良品种的开发做出了宝贵贡献。我们的计算表明，10 个最受采用的水稻品种中所有配对组合的平均亲本系数为 0.0973，表明潜在的遗传多样性程度很高。结果表明，IRG 保存和分配的遗传资源对水稻改良品种的开发做出了宝贵贡献。我们的计算表明，10 个最受采用的水稻品种中所有配对组合的平均亲本系数为 0.0973，表明潜在的遗传多样性程度很高。调查结果表明，IRG 保存和分配的遗传资源对水稻改良品种的开发做出了宝贵贡献。