摘要
为高抗性淀粉小麦品种的选育提供理论依据,利用抗性淀粉含量较高的小麦品种M344和抗性淀粉含量较低的小麦品种武春3号重组自交得到F2∶3家系,对F2∶3家系抗性淀粉含量与总淀粉含量、直链淀粉含量及膨胀势进行了相关、回归及通径分析,分析了小麦抗性淀粉与其它淀粉性状之间的关系。结果表明:小麦抗性淀粉含量与直链淀粉含量呈极显著正相关(r=0.18,P≤0.01),通径分析表明直链淀粉含量对小麦抗性淀粉含量存在正向影响,直接通径系数达0.169;小麦抗性淀粉含量与总淀粉含量呈显著正相关(r=0.151,P≤0.05),但与膨胀势间呈不显著负相关(r=-0.57)。小麦抗性淀粉含量(Y)与总淀粉含量(X1)、直链淀粉含量(X2)及膨胀势(X3)间的回归方程为Y=0.289+0.007X1+0.037X2-0.033X3,该方程可解释抗性淀粉7%的表型变异,说明抗性淀粉含量与直链淀粉含量的关系最密切,其次为总淀粉含量。
A wheat cultivar（M344） with higher resistant starch content and the other wheat cultivar（Wuchun 3） with lower resistant starch content were selected to recombinant inbred to obtain F2,3 Lines,which was used to determine the relationship between the resistant starch content and the other starch quality characters in wheat. The relationship between the resistant starch content and other starch quality characters （total starch content,amylose content and swelling power） in wheat was analyzed by correlation, regression and path analyses. The result showed that resistant starch content positively correlated with amylase content extremely significantly（r= 0.18, P≤0.01）, which also positively correlated with total starch content significantly（r=0. 151 ,P≤0.05） and negatively correlated with swelling power （r=-0.57）. Path analysis showed total starch content could improve resistant starch content and the direct path modulus between them was 0. 169. The regression equation among resistant starch content（Y）, total starch content （X1） ,amylose content（X2 ）and swelling power（X3 ） was Y=0. 289＋0. 007X1 ＋0. 037X2 -0. 033X3 ,which could provide a 7% explanation for the phenotypic variations and also explained that resistant starch content extremely related with amylase content and then was total starch content.
出处
《石河子大学学报（自然科学版）》
CAS
2010年第2期147-151,共5页
Journal of Shihezi University(Natural Science)
基金
新疆兵团博士基金项目(ZD2007JC05)
关键词
小麦
抗性淀粉
相关分析
通径分析
wheat
resistant starch
correlation analysis
path analysis
