Characterizing traits that enhance the competitiveness of winter wheat (Triticum aestivum) against jointed goatgrass (Aegilops cylindrica)

被引:60
作者
Ogg, AG
Seefeldt, SS
机构
[1] AgRes, Ruakura Agr Res Ctr, Hamilton, New Zealand
[2] Natl Jointed Goatgrass Res Program, Ten Sleep, WY 82442 USA
关键词
Bromoxynil; ethyl-metribuzin; thifensulfuron; tribenuron; jointed goatgrass; Aegilops cylindrica Host AEGCY; winter wheat; Triticum aestivum L; growth rate; height; path analysis; tillers; water use; AEGCY;
D O I
10.1017/S0043174500090688
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Our objective was to identify traits in winter wheat important to competitiveness against jointed goatgrass, measured as increased wheat yields and reduced jointed goatgrass seed production. Jointed goatgrass is an important winter annual grass weed that cannot be controlled selectively in winter wheat. Seven cultivars of soft white winter wheat were grown with and without competition From jointed goatgrass over two growing seasons. Measurements of numerous traits of winter wheat and jointed goatgrass were recorded throughout each growing season. The data were analyzed using path analysis with latent variables to determine which traits most enhanced competitiveness. In a drier year, increased rate of height development was important in maintaining wheat yields when wheat was growing in competition with jointed goatgrass. Increased rare of height development also was an important trait in reducing jointed goatgrass seed production. In a wet year compared to a dry year, the number of wheat heads per plant, the rate of water use, and weight gain were positively correlated to maintaining winter wheat yields. Jointed goatgrass seed production in the wet year was reduced overall compared to the dry year, but From the cultivars tested, there were no trails identified that were critical in enhancing this loss of seed production. This study suggests that cultivars with greater height development rates will be more competitive when growing in fields infested with jointed goatgrass.
引用
收藏
页码:74 / 80
页数:7
相关论文
共 14 条
[1]  
CHALLAIAH OC, 1986, WEED SCI, V34, P689
[2]  
Donald C. M., 1981, Wheat science - today and tomorrow., P223
[3]  
DONALD WW, 1987, WEED SCI, V35, P149
[4]   BIOLOGY AND CONTROL OF JOINTED GOATGRASS (AEGILOPS-CYLINDRICA) - A REVIEW [J].
DONALD, WW ;
OGG, AG .
WEED TECHNOLOGY, 1991, 5 (01) :3-17
[5]   Canada thistle (Cirsium arvense) effects on yield components of spring wheat (Triticum aestivum) [J].
Donald, WW ;
Khan, M .
WEED SCIENCE, 1996, 44 (01) :114-121
[6]   CHARACTERIZATION OF ROOT AND SHOOT DEVELOPMENT OF JOINTED GOATGRASS (AEGILOPS-CYLINDRICA) [J].
DOTRAY, PA ;
YOUNG, FL .
WEED SCIENCE, 1993, 41 (03) :353-361
[7]  
FENSTER CR, 1976, 75210 G NEBR U COOP
[8]   COMPETITIVE RELATIONSHIPS AMONG WINTER-WHEAT (TRITICUM-AESTIVUM), JOINTED GOATGRASS (AEGILOPS-CYLINDRICA), AND DOWNY BROME (BROMUS-TECTORUM) [J].
FLEMING, GF ;
YOUNG, FL ;
OGG, AG .
WEED SCIENCE, 1988, 36 (04) :479-486
[9]   BREEDING IMPLICATIONS OF RELATIONSHIP BETWEEN COMPETITIVE ABILITY AND PURE CULTURE YIELD IN SELF-POLLINATED GRAIN CROPS [J].
HAMBLIN, J ;
ROWELL, JG .
EUPHYTICA, 1975, 24 (01) :221-228
[10]  
HATCHER L, 1994, STEP BY STEP APPROAC