Variation and genetic studies on selected sweet corn inbred lines.
Variation and genetic studies on selected sweet corn inbred lines.
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选定甜玉米自交系的变异和遗传研究。
DOI：
10.3923/ajcs.2010.78.84
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
S. Abdullah
中科院分区：
文献类型：
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作者：
P. Kashiani;G. Saleh;N. Abdullah;S. Abdullah
对9个热带甜玉米优良自交系的表现、广义遗传力和表型相关进行了评价。这些自交系在去皮鲜穗产量及其构成因素上表现出广泛的表现。综合表现和早熟性，巴克提-1-S7、TSS马六甲-S5、泰国-S6、MM x印度尼西亚-S4和玛尼斯马杜-S7等自交系表现较优，可作为进一步进行一般配合力和特殊配合力分析的候选材料，用于杂交品种的选育。用方差分方法估计的广义遗传力(H_2B)较高的是抽穗天数(80.5%)、株高(79.9%)、抽穗天数(66.9%)和穗高(63.7%)，其次是去壳穗产量(56.7%)、总可溶性固形物浓度(54.2%)、每穗粒行数(53.9%)、穗粗(46.7%)、去壳穗产量(43.1%)，行粒数(42.6%)和每公顷穗数(34.5%)，而去壳穗长(12.9%)和去壳穗长(0.3%)最低。与去壳穗产量相关最大的性状是去壳穗产量(0.97)、每穗粒行数(0.71)、株高(0.69)、去壳穗长(0.67)、穗高(0.66)、去壳穗长(0.63)、穗粗(0.55)、行粒数(0.50)和每公顷穗数(0.49)。因此，在选择自交系时，应重点考虑每穗粒行数、株高和穗长等性状，以提高自交系的产量。
Nine advanced tropical sweet corn (Zea mays L.saccharata) inbred lines were evaluated to determine their performance, to estimate broad-sense heritability of the traits measured and to determine phenotypic correlations among the traits. The inbred lines showed a wide range of performance for husked fresh ear yield and its components. Based on performance and earliness, inbred lines Bakti-1-S7, TSS Melaka-S5, Thailand-S6, MM x Indonesia-S4 and Manis Madu-S7 were found to be superior and could be short-listed for further testing for general and specific combining ability analysis towards development of hybrid varieties. Broad-sense heritability (h2B) estimates obtained from the variance components method were found to be high for number of days to silking (80.5%), plant height (79.9%), number of days to tasseling (66.9%) and ear height (63.7%), moderate for husked ear yield (56.7%), total soluble solid concentration (54.2%), number of kernel rows per ear (53.9%), ear diameter (46.7%), dehusked ear yield (43.1%), number of kernels per row (42.6%) and number of ear per hectare (34.5%), while lowest estimates for dehusked ear length (12.9%) and husked ear length (0.3%). Traits found to be highly correlated with husked ear yield were dehusked ear yield (0.97), number of kernel rows per ear (0.71), plant height (0.69), husked ear length (0.67), ear height (0.66), dehusked ear length (0.63), ear diameter (0.55), number of kernels per row (0.50) and number of ears per hectare (0.49). For selection purposes, it is therefore suggested that emphasis should be given on traits like number of kernel rows per ear, plant and ear height and ear length for yield improvement among the inbred lines.