周得寶 王娟 王五洲 吳蘭云 徐茂林 李明兵 周言虎 竇樂
摘要[目的]研究淮北地區夏玉米品系(種)的產量與主要農藝性狀關聯度。[方法]運用灰色關聯度分析方法,研究14個夏玉米品系(種)的產量與10個主要農藝性狀間關聯的主次關系及各性狀間的相互關聯程度。[結果]有76.9%品系的產量顯著高于對照鄭單958;主要農藝性狀與產量關聯度大小依次為禿尖長、株高、穗行數、穗長、行粒數、穗位高、百粒重、倒伏倒折率、出籽率、穗粗。[結論]在育種實踐中應盡可能選擇禿尖短、株高中等偏上、穗行數較多和穗長較長的品系。
關鍵詞玉米;關聯度分析;產量;農藝性狀
中圖分類號S513文獻標識碼A文章編號0517-6611(2017)26-0048-04
Comparison of Yield and Correlation Degree between Main Agronomic Traits of Summer Maize Lines(Varieties)
ZHOU Debao1,WANG Juan2,WANG Wuzhou3 et al
(1.Suzhou Academy of Agricultural Sciences,Suzhou,Anhui 234000;2.Anhui Huacheng Seed Industry Co.,Ltd.,Suzhou,Anhui 234000;3.Lingbi County Agriculture Committee,Suzhou,Anhui 234200)
Abstract[Objective]The yield of summer maize and correlation degree of agronomic traits in Huaibei region were studied.[Method] Based on the grey relational analysis method,the relationship between the yield of 14 summer maize lines(varieties) and 10 main agronomic traits and the correlation between the traits were studied.[Result] The yield of 76.9% lines was significantly higher than that of control Zhengdan 958. The correlation degree order of main agronomic traits and yield was as follows:bare top length,plant height,ear row number,ear length,row grains,ear height,100seed weight,lodging and stem broken rates,seedproducing percentage,ear diameter.[Conclusion]In the breeding practice, we should choose the long lines of the bald tip shorter,plant height higher,ear rows more.
Key wordsMaize;Correlation degree analysis;Yield;Agronomic traits
玉米是重要的糧食作物、飼料作物和經濟作物,在我國農業生產和國民經濟發展中占有重要的地位。根據玉米種植結構調整規劃,到2020年我國玉米種植面積將減少333萬hm2。提高單產水平將是進一步增加玉米產量的重要途徑。產量是一個復雜的數量性狀,受多個性狀因素共同影響,弄清各個因素對產量的影響,將對育種家選育優良品系有極大的參考價值。目前,評價作物產量與性狀關系的方法大體上有方差分析、決定系數分析、回歸分析、通徑分析等,但各有優缺點。而灰色關聯度分析法是研究作物多元性狀相對重要性的良好方法[1],該方法是在20世紀80年代提出的一種分析理論,能較好地反映事物的本質,具有所需樣本小、方法簡便、信息量大的優點。在玉米產量與性狀的關系上,運用灰色關聯度分析法進行分析此前報道較多并取得一定的結果。……