糯玉米雄穗性狀的配合力及遺傳相關性研究

食品科學論文編號:SP022 論文字數:9051,頁數:19

目錄
1  前言 1
2　實驗材料與研究方法 2
2.1　實驗材料 2
2.2　田間試驗方法 2
2.3　雄穗長和分枝數測定 2
2.4　營養品質的測定 2
2.5　支鏈淀粉的測定方法 3
2.6　統計方法 3
3　結果與分析 3
3.1　雄穗性狀與主要品質性狀間相關性 3
3.2　配合力分析 4
3.2.1　配合力方差分析 4
3.2.2　一般配合力效應分析 5
3.2.3　特殊配合力效應分析 6
3.2.4　總配合力的效應分析 7
3.3　雄穗性狀遺傳參數分析 8
4　結論與討論 9
參考文獻 11
Abstract 12
附表 13

摘        要
 本研究以8個糯玉米自交系為親本，按照雙列雜交GriffingⅣ配制了28個組合，進行了雄穗主軸長度和分枝數2個性狀與主要品質性狀的遺傳相關性分析和配合力效應及相應的遺傳參數的研究。研究結果表明：（1）雄穗分枝數與支鏈淀粉呈顯著負相關（-0.44038*），支鏈淀粉與雄穗長度呈極顯著正相關（0.55459**）。（2）雄穗分枝數負向總配合力效應最高的是N7×N23，而雄穗長度總配合力效應最高的是N7×N28；（3）雄穗長度和分枝數的廣義遺傳力都較低分別為66.03%，60.25%；從狹義遺傳力是雄穗長度較高為57.87%，而雄穗分枝數較低為31.28%，這說明雄穗長度在早代進行選擇較好，而雄穗分枝數應在晚代選擇為好；（4）適度增長雄穗主軸長，減少雄穗分枝數，有助于提高糯玉米支鏈淀粉的含量。
關鍵詞：  糯玉米  配合力  雄穗性狀  遺傳參數  遺傳相關性

 Study on the Combining Ability and Genetic Correlation
 of Tassel Traits in Waxy corn

 Abstract:Eight inbred lines of waxy corn according to the Griffing diallel method Ⅳwere designed experiment and 28 hybrid combination. The combining ability effect and genetic parameters of tassel length and tassel branch number were studied, and the genetic correlation between tassel traits and main qualitative Traits were also studied. The results shown as follow:   (1)negative significant correlation was found between tassel branch number and amylopectin content(-0.44038*); there was very significant positive correlation between tassel length and amylopectin content(0.55459**). (2)The analysis of combining ability effect shown that N7×N23 had the highest negative value of TCA on tassel branch number, N7×N28 had the highest positive value of TCA on tassel length. (3)The generalized heritability was low both on tassel length and tassel branch number were 66.03%and 60.25%; The narrow heritability valueof tassel length was 57.87% higher than tassel branch number was 31.28%. It shown that the tassel length had better choose effect in low generation, and tassel branch number had better choose effect in late generation. (4)Moderately increase the tassel length, reduce the tassel branch number, could improve the amylopeatin content of waxy corn.
Key words:Waxy corn; Combining ability; Genetic parameters; Genetic correlation; Tassel traits