Jai S. Rohila, David R. Gealy, Aaron K. Jackson, Lewis H. Ziska
{"title":"评估在干湿交替灌溉管理条件下栽培稻与杂草稻的杂交潜力","authors":"Jai S. Rohila, David R. Gealy, Aaron K. Jackson, Lewis H. Ziska","doi":"10.1002/agj2.21594","DOIUrl":null,"url":null,"abstract":"<p>In recent years, water conservation efforts in rice production have necessitated the use of reduced irrigation input systems such as alternate wetting and drying (AWD) as a substitute to conventional continuous flood-irrigated systems (FLD), but little is known about the role of AWD in altering outcrossing potentials between cultivated rice and weedy rice (WR). In the United States, rice growers often control WR by cultivating varieties that possess herbicide resistance. However, an ongoing concern with such technology is hybridization or outcrossing between herbicide-resistant rice cultivars and WR over time. Such outcrossing may result in transferring of herbicide resistance with increased occurrence of herbicide-resistant WR ecotypes and reduction in the efficacy of herbicide management. This study compared and quantified outcrossing rates between two Clearfield rice varieties (CL142AR and CL261) that are herbicide resistant and two common WR genotypes, strawhull (SH) and blackhull (BH), under FLD and AWD management. Outcrossing was evident in all four genotype combinations (i.e., CL142AR or CL261 cultivated rice and SH or BH weedy rice) in both FLD and AWD; however, outcrossing rates with CL261 averaged about 6.5 times lower than those with CL142AR. Additional analysis revealed that higher outcrossing rates were associated with increased synchrony of flowering times and closer vertical proximity of panicles of WR to CL142AR than with CL261. AWD irrigation reduced outcrossing in SH weedy rice, suggesting that reduced outcrossing of SH weedy rice might be an additional benefit from AWD irrigation management.</p>","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":null,"pages":null},"PeriodicalIF":2.0000,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Assessment of outcrossing potential between cultivated and weedy rice under alternate wetting and drying irrigation management\",\"authors\":\"Jai S. Rohila, David R. Gealy, Aaron K. Jackson, Lewis H. Ziska\",\"doi\":\"10.1002/agj2.21594\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>In recent years, water conservation efforts in rice production have necessitated the use of reduced irrigation input systems such as alternate wetting and drying (AWD) as a substitute to conventional continuous flood-irrigated systems (FLD), but little is known about the role of AWD in altering outcrossing potentials between cultivated rice and weedy rice (WR). In the United States, rice growers often control WR by cultivating varieties that possess herbicide resistance. However, an ongoing concern with such technology is hybridization or outcrossing between herbicide-resistant rice cultivars and WR over time. Such outcrossing may result in transferring of herbicide resistance with increased occurrence of herbicide-resistant WR ecotypes and reduction in the efficacy of herbicide management. This study compared and quantified outcrossing rates between two Clearfield rice varieties (CL142AR and CL261) that are herbicide resistant and two common WR genotypes, strawhull (SH) and blackhull (BH), under FLD and AWD management. Outcrossing was evident in all four genotype combinations (i.e., CL142AR or CL261 cultivated rice and SH or BH weedy rice) in both FLD and AWD; however, outcrossing rates with CL261 averaged about 6.5 times lower than those with CL142AR. Additional analysis revealed that higher outcrossing rates were associated with increased synchrony of flowering times and closer vertical proximity of panicles of WR to CL142AR than with CL261. AWD irrigation reduced outcrossing in SH weedy rice, suggesting that reduced outcrossing of SH weedy rice might be an additional benefit from AWD irrigation management.</p>\",\"PeriodicalId\":7522,\"journal\":{\"name\":\"Agronomy Journal\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.0000,\"publicationDate\":\"2024-05-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Agronomy Journal\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/agj2.21594\",\"RegionNum\":3,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"AGRONOMY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Agronomy Journal","FirstCategoryId":"97","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/agj2.21594","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"AGRONOMY","Score":null,"Total":0}
Assessment of outcrossing potential between cultivated and weedy rice under alternate wetting and drying irrigation management
In recent years, water conservation efforts in rice production have necessitated the use of reduced irrigation input systems such as alternate wetting and drying (AWD) as a substitute to conventional continuous flood-irrigated systems (FLD), but little is known about the role of AWD in altering outcrossing potentials between cultivated rice and weedy rice (WR). In the United States, rice growers often control WR by cultivating varieties that possess herbicide resistance. However, an ongoing concern with such technology is hybridization or outcrossing between herbicide-resistant rice cultivars and WR over time. Such outcrossing may result in transferring of herbicide resistance with increased occurrence of herbicide-resistant WR ecotypes and reduction in the efficacy of herbicide management. This study compared and quantified outcrossing rates between two Clearfield rice varieties (CL142AR and CL261) that are herbicide resistant and two common WR genotypes, strawhull (SH) and blackhull (BH), under FLD and AWD management. Outcrossing was evident in all four genotype combinations (i.e., CL142AR or CL261 cultivated rice and SH or BH weedy rice) in both FLD and AWD; however, outcrossing rates with CL261 averaged about 6.5 times lower than those with CL142AR. Additional analysis revealed that higher outcrossing rates were associated with increased synchrony of flowering times and closer vertical proximity of panicles of WR to CL142AR than with CL261. AWD irrigation reduced outcrossing in SH weedy rice, suggesting that reduced outcrossing of SH weedy rice might be an additional benefit from AWD irrigation management.
期刊介绍:
After critical review and approval by the editorial board, AJ publishes articles reporting research findings in soil–plant relationships; crop science; soil science; biometry; crop, soil, pasture, and range management; crop, forage, and pasture production and utilization; turfgrass; agroclimatology; agronomic models; integrated pest management; integrated agricultural systems; and various aspects of entomology, weed science, animal science, plant pathology, and agricultural economics as applied to production agriculture.
Notes are published about apparatus, observations, and experimental techniques. Observations usually are limited to studies and reports of unrepeatable phenomena or other unique circumstances. Review and interpretation papers are also published, subject to standard review. Contributions to the Forum section deal with current agronomic issues and questions in brief, thought-provoking form. Such papers are reviewed by the editor in consultation with the editorial board.