十和田/丽粳2号回交重组自交系糙米Zn含量与其他元素和农艺性状间相关性

Correlation between Brown Rice Zinc Content with Other Elememnts and Agronomic Traits in Backcross Recombinant Inbred Lines(BRILs)for Towada/Lijing2

用ICP-AES法测定了十和田/丽粳2号/十和田BC4F5回交重组自交系264个株系糙米Zn含量及其在株型间的遗传变异,分析了糙米Zn含量与16种元素(K、P、S、Mg、Ca、Mo、Ni、Fe、Cr、Na、Al、Cu、Sn、B、Mn和Sr)、9个农艺性状(结实率、实粒数、秕粒数、穗长、有效穗、花药长度、花药宽度、穗茎节间长和倒2叶长)、MDA(丙二醛)含量、3种酶(POD、SOD、CAT)活性间相关性,旨在揭示糙米Zn与其他元素、稻米产量、稻耐冷性等关联性。结果表明:回交重组自交群体糙米Zn含量为正态分布,有超亲优势株系;糙米Zn含量与8种元素(K、S、P、Mg、Ca、Fe、B、Mn)含量呈极显著相关,与5种元素(S、Mg、Ni、Cr、Al)含量呈显著偏相关;初步认为糙米Zn含量与稻米产量及耐冷性为负相关,与酶活性相关性不显著。

Brown rice zinc content and it＇ s variation in 264 plant lines in BRILs（Towada/Lijing2/ Towada BC4F5 ）were determined by ICP-AES technique. Correlations between brown rice znic content with sixteen elements （ K, P, S, Mg, Ca, Mo, Ni, Fe, Cr, Na, Al, Cu, Sn, B, Mn and Sr） content, nine agronomic traits （ seed setting rate, full grains, blighted grains, panicle length, effective tillering, anther length, anther width, uppermost internode length, and reciprocal secondary leaf length ） , MDA content and three enzyme activity （POD, SOD and CAT）were analysed. The aim of that were to open out association between zinc in brown rice with other mineral element, yield and cold tolerane et al traits of rice. The results showed that brown rice zinc content distribution in BRILs were normal and some lines had more zinc content than parents. Brown rice zinc content significant correlated with eight elements （ K, S, P, Mg, Ca, Fe, B, Mn） content at 0.01 level and significantly partial correlated with five elements （ S, Mg, Ni, Cr, A1） content at 0.05 level. Brown rice zinc content were deemed primary to correlate negatively with yield and cold tolerane of rice. Correlation between brown rice zinc content with menzyme activity were not significant.