Genetic control of voltinism characteristics in European corn borer races assessed with a marker gene
Genetic control of voltinism characteristics in European corn borer races assessed with a marker gene
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用标记基因评估欧洲玉米螟品种的伏丁性特征的遗传控制
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发表时间：
1992
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影响因子：
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通讯作者：
W. Roelofs
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作者：
T. Glover;P. Robbins;C. Eckenrode;W. Roelofs
一化型玉米螟在滞育破灭条件下的滞育发育时间平均约为44天，而二化型玉米螟在相同条件下的滞育后发育时间约为15天。这种差异是生命周期的主要组成部分，它决定了夏季可能发生的世代数量。以前的工作人员已经证明了一些遗传控制种群之间的卷积差异，包括明显的性别连锁(Z连锁)基因的控制。
在本研究中，该酶的等位基因磷酸丙糖异构酶(TPI)被用作二化性菌落(TPI-1)和一化性菌落(TPI-2)杂交的Z染色体的标记。单性雌株(Z2W)与二化性雄株(Z1Z1)杂交产生的F1由TPI-1半合子雌株(Z1W)和杂合TPI-1/TPI-2雄株(Z1Z2)组成，平均PDD时间为34天。F2代包括TPI-1雌性(Z1W)(平均PDD时间=15天)、TPI-2雌性(Z2W)(平均PDD时间=40天)、纯合子TPI-1雄性(Z1Z1)(平均PDD时间=16天)和杂合子TPI-1/TPI-2雄性(Z1Z2)(平均PDD时间=25天)。在这些杂交组合中，TPI表型与PDD时间的密切相关，以及母本和父本回交的相似结果，表明PDD时间主要由Z染色体上的基因控制，杂合子雄性表现出这些基因的不完全或部分显性。©1992 Wiley-Liss，Inc.
The post-diapause development (PDD) time for univoltine European corn borers (ECB) under diapause breaking conditions averages approximately 44 days, whereas the PDD time for bivoltine ECB under the same conditions is approximately 15 days. This difference is the principal component of the life cycle that determines the number of generations possible in a summer. Previous workers have demonstrated some genetic control of differences in voltinism among populations, including apparent control by sex-linked (Z-linked) genes.
In the present study allozymes of the enzyme, triose phosphate isomerase (TPI), were used as markers of the Z chromosomes in crosses of a bivoltine colony (Tpi-1) and a univoltine colony (Tpi-2). The F1 resulting from a cross of univoltine females (Z2W) and bivoltine males (Z1Z1) consisted of hemizygous Tpi-1 females (Z1W) with a mean PDD time of 19 days and heterozygous Tpi-1/Tpi-2 males (Z1Z2) with a mean PDD time of 34 days. The F2 progeny consisted of Tpi-1 females (Z1W) (mean PDD time = 15 days), Tpi-2 females (Z2W) (mean PDD time = 40 days), homozygous Tpi-1 males (Z1Z1) (mean PDD time = 16 days), and heterozygous Tpi-1/Tpi-2 males (Z1Z2) (mean PDD time = 25 days). The close correlation of TPI phenotypes and PDD times in these crosses, along with similar results for the maternal and paternal backcrosses of the F1 individuals, indicates that the PDD time is principally controlled by genes on the Z chromosome and that heterozygous males exhibit incomplete or partial dominance of these genes. © 1992 Wiley-Liss, Inc.