| 摘要: |
| 【目的】评价新麦草（Psathyrostachys juncea）种质在不同试点、不同年份的丰产性和稳产性，筛选出适应性强的优良新麦草种质，为新麦草种质的鉴定及推广提供理论依据。【方法】以21份新麦草种质各自建立的2个克隆群体为材料，采用联合方差分析和GGE模型,对2个试验点连续2年的8个种子产量相关性状的适应性、丰产性和稳产性及试验点鉴别力和代表性进行分析。【结果】在不同环境、不同年份，21份新麦草种质的种子产量性状均表现出较大变异，其中单株种子产量变异系数最大，为72.41%，且连续2年在包头试验点种子产量性状均高于呼和浩特试验点。方差分析结果表明，生殖枝数、穗宽、穗节数、千粒质量、单穗种子质量和单株种子产量，在年份、环境（试验点）和基因型（新麦草种质）及其互作效应下均达到了极显著水平（P<0.01），环境和年份效应对新麦草的种子产量性状影响占主导因素。综合新麦草8个种子产量性状的适应性结果显示，在呼和浩特生态区适应性较强的种质是PI 549118、PI 502573、PI 531827、PI 598610、PI 565052和CF 005043；在包头生态区适应性较强的种质是PI 549118、PI 619565、PI 502577、PI 598610、PI 531827和PI 578854。高产性和稳产性结果显示，新麦草种子产量性状的稳产性和丰产性表现较好的种质为PI 549118和PI 502572。试点间相关性结果显示，2个试验点之间存在着密切正相关关系。综合考虑鉴别力和适应性，比较理想的试验点是包头。【结论】综合新麦草种子产量性状的GGE双标图，筛选出在内蒙古局部地区有推广价值的新麦草种质为PI 549118、PI 502572和PI 598610，具有代表性和适应性的理想试验点为包头。 |
| 关键词: 新麦草 种子产量性状 种质鉴定 GGE双标图 |
| DOI：10.13207/j.cnki.jnwafu.2025.02.003 |
| 分类号: |
| 基金项目:内蒙古自治区自然科学基金重点项目（2023ZD07）；国家自然科学基金面上项目（32371762） |
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| Comprehensive evaluation of fertility yield and stability of Psathyrostachys juncea germplasm in different environments |
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LI Zhen1, YUN Lan1,2, WANG Tian3, REN Xiaomin1, JIA Xiaodi1, LÜ Yuru1
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1.College of Grassland Resource and Environment,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010018,China;2.Key Laboratory of Grassland Resources of Education Ministry,College of Grassland Resource and Environment,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010011,China;3.Bayannur City Animal Husbandry Service Center,Bayannur,Inner Mongolia 015000,China
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| Abstract: |
| 【Objective】The study aimed to evaluate the yield and stability of Psathyrostachys juncea germplasm in different locations and years, screen out the excellent P. juncea germplasm with strong adaptability, and provide theoretical basis for the identification and promotion of P. juncea germplasm.【Method】In this study,two clonal populations were established from each of the 21 P. juncea germplasms as experimental materials.The adaptability,yielding ability,stability,discrimination ability and representativeness of eight seed yield-related traits at two locations for two consecutive years were analyzed by ANOVA analysis and GGE biplot model.【Result】In different environments and different years,the seed yield-related traits of 21 P. juncea germplasms showed significant variation.Among them,the coefficient variation of seed yield per plant was the highest.The seed yield-related trait indicators at the Baotou experimental site were higher than those at the Hohhot experimental site for two consecutive years.The ANOVA analysis showed that reproductive tiller numbers,spike width,spike node numbers,thousand kernel weight,seed weight per spike and seed yield per plant reached extremely significant level,affected by genotype,environment,year and their interactions (P<0.01).The effects of environment and year on seed yield traits of P. juncea were dominant.The results of adaptability analysis of eight seed yield related traits of P. juncea showed that the most adaptable germplasms in Hohhot were PI 549118,PI 502573,PI 531827,PI 598610,PI 565052 and CF 005043;the most adaptable germplasms in Baotou were PI 549118,PI 619565,PI 502577,PI 598610,PI 531827 and PI 578854.The results of yielding ability and stability analysis showed that PI 549118 and PI 502572 had better performance.The results of correlation analysis between the two locations showed that there was a close positive correlation between the two sites.Combining the discrimitiveness and adaptability analysis,the ideal pilot was Baotou.【Conclusion】Based on the GGE biplot of seed yield traits of P. juncea,PI 549118,PI 502572 and PI 598610 of P. juncea germplasms with promotion value in Inner Mongolia,as well as Baotou,an ideal experimental site with representativeness and adaptability were screened. |
| Key words: Psathyrostachys juncea seed yield related traits germplasm identification GGE biplot |
