墨西哥春小麦品种熟期与穗部经济性状的遗传通径分析  

Path analysis on maturing and economical character of vernal wheat germplasm resources from Mexico

作　　者：伍绍云[1] 奉有壁[1] 

机构地区：[1]云南省农科院品资站,中国昆明650205

出　　处：《西南农业学报》2000年第3期28-32,共5页Southwest China Journal of Agricultural Sciences

摘　　要：对３５份墨西哥春小麦品种的拔节期、抽穗期、开花期、成熟期和稳粒数、千粒重、穗粒重及小区产量等８个性状的遗传相关和通径关系进行分析研究，结果表明：①墨西哥小麦品种的抽穗期、开花期与成熟期呈极显著表型正相关（ｒ=０．５９和０．５６９）和遗传正相关（ｒ＝０．６７和０．７１２）；②抽穗期、开花期和成熟期与穗粒数呈显著遗传正相关（ｒ＝０．３８９、０．４４２和０．４１８）；③拔节期、抽穗期、开花期及成熟期与千粒重呈显著或极显著表型负相关（ｒ＝－０．４９５、－０．３８１、－０．４６３和－０．２９８）和遗传负相关（ｒ＝－０．７８、－０．６６、－０．７７和－０．３７４）；④拔节期与小区产量呈显著或极显著表型正相关和遗传正相关（ｒ＝０．３９６和０．５１９）；⑤开花期对成熟期、拔节期和开花期对穗粒数和千粒重、拔节期和穗粒数对小区产量具有真实的通径关系。Genetic relationship of 8 character, e.g. shooting period, heading period, flowering stage, mature period and grains per spike, 1000-seed weight, grain weight per spike, yield per plot etc. were studied by means of path analysis. The results indicated that positive phenotype and genetic correlation of heading period and flowering to mature period were significant or highly significant, positive genetic correlation of heading period and flowering to grains per spike were significant, negative phenotype and genetic correlation of shooting period and heading peroid and flowering and mature period to 1000-seed weight were significant or highly significant, positive phenotype and genetic correlation of shooting period to yield per plot were significant or highly significant, relationship of path of flowering peri od to mature period, heading period and flowering to grains per spike and 1000-seed weight, shooting period and grain number per spike to yield per plot were real.

关 键 词：墨西哥春小麦 品种 熟期 穗部经济性状 通径分析 

分 类 号：S512.120.2[农业科学—作物学] S512.120.3