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[1]LIU Li-sheng,ZHANG Sui-qi,WANG Zheng-hong.Response of Different Ploidy Wheat to Moisture and Density Conditions[J].Research of Soil and Water Conservation,2009,16(05):203-209.

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Response of Different Ploidy Wheat to Moisture and Density Conditions

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 16 Number of periods: 2009 05 Page number: 203-209 Column: Public date: 2009-10-20

Title:: Response of Different Ploidy Wheat to Moisture and Density Conditions

Author(s):: LIU Li-sheng¹, ZHANG Sui-qi^1,2, WANG Zheng-hong¹; 1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: different ploidy wheat; yield; moisture; density; response

CLC:: S512.1;S311

DOI:: -

Abstract:: The adaptive change of different ploidy wheat materials to density and water conditions were studied under rain-out shelter experiment condition.The results showed that in the evolution of wheat from diploid to tetraploid and hexaploid,yield,grain weight,water use efficiency and harvest index were increased gradually under drought conditions.The maximum yield of different material appear in the medium,low and high-density groups,the yield variance coefficients of different material from 2n to 6n were 6.73%,1.98% and 9.07% respectively; grain weight increased,and ear number and grain number per ear gradually decreased with the ploidy increased; grain weight decreased and ear number increased with the density increased for the same material.The grain number per ear was the highest for Diploid in Medium density population,and it increased for tetraploid wheat with the population density increased but it was decreased for hexaploid wheat.Water use efficiency and harvest index gradually increased with the increase of ploidy.Under irrigation conditions,the yield,grain weight,grain number per ear,water use efficiency and harvest index were increased gradually with the increase of ploidy.The maximum yield of different material appear in the high,low and low-density population,and the yield variance coefficients of different material from 2n to 6n were 6.01%,17.12%,2.46% respectively; the highest grain weight appear in medium-density population and the lowest appear in high-density population for the same material; the highest grain number per ear appear in low-density population and the ear number increased with the density increases for same material; the maximum WUE of diploid appear in high-density population,WUE of tetraploid and hexaploid wheat decreased with the increase of density; the maximum harvest index of diploid appear in low-density,and they were decreased with density increase for tetraploid and hexaploid wheat.The results of the study provides a theoretical basis on the cultivation and breeding of arid and semi-arid region water-saving and high-yield of wheat.

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