Maize (Zea mays L.)

Quantitative trait locus analysis for kernel width using maize recombinant inbred lines

G. Q. Hui, Wen, G. Q., Liu, X. H., Yang, H. P., Luo, Q., Song, H. X., Wen, L., Sun, Y., and Zhang, H. M., “Quantitative trait locus analysis for kernel width using maize recombinant inbred lines”, vol. 14, pp. 14496-14502, 2015.

Maize (Zea mays L.) kernel width is one of the most important traits that is related to yield and appearance. To understand its genetic mechanisms more clearly, a recombinant inbred line (RIL) segregation population consisting of 239 RILs was used for quantitative trait locus (QTL) mapping for kernel width. We found four QTLs on chromosomes 3 (one), 5 (two), and 10 (one). The QTLs were close to their adjacent markers, with a range of 0-23.8 cM, and explained 6.2-19.7% of the phenotypic variation.

Genetic analysis of maize kernel thickness by quantitative trait locus identification

S. S. Wen, Wen, G. Q., Liao, C. M., and Liu, X. H., “Genetic analysis of maize kernel thickness by quantitative trait locus identification”, vol. 14, pp. 9858-9864, 2015.

Kernel thickness is one of the most important traits in kernel structure, and is related to yield. To ascertain its genetic information more clearly, an immortal recombinant inbred line segregation population was used to map the quantitative trait loci (QTLs) for kernel thickness. As a result, two QTLs were identified on chromosome 9; both of them had negative additive effects, and could decrease kernel thickness to some extent. The QTLs explained 25.8% of the total phenotypic variation.

Descriptive statistics and correlation analysis of agronomic traits in a maize recombinant inbred line population

H. M. Zhang, Hui, G. Q., Luo, Q., Sun, Y., and Liu, X. H., “Descriptive statistics and correlation analysis of agronomic traits in a maize recombinant inbred line population”, vol. 13, pp. 457-461, 2014.

Maize (Zea mays L.) is one of the most important crops in the world. In this study, 13 agronomic traits of a recombinant inbred line population that was derived from the cross between Mo17 and Huangzao4 were investigated in maize: ear diameter, ear length, ear axis diameter, ear weight, plant height, ear height, days to pollen shed (DPS), days to silking (DS), the interval between DPS and DS, 100-kernel weight, kernel test weight, ear kernel weight, and kernel rate.

Quantitative trait locus analysis for ear height in maize based on a recombinant inbred line population

Z. Q. Li, Zhang, H. M., Wu, X. P., Sun, Y., and Liu, X. H., “Quantitative trait locus analysis for ear height in maize based on a recombinant inbred line population”, vol. 13, pp. 450-456, 2014.

Maize (Zea mays L.) is among the crops with the greatest worldwide economic importance. Ear height is a very important trait that is considered necessary in maize and is related to morphology, lodging, and yield. To realize its genetic basis, an F9 recombinant inbred line population and a genetic map consisting of 101 simple sequence repeat markers were used to detect the quantitative trait locus (QTL) for ear height, and the result showed that one QTL on chromosome 1 was identified with a mapping interval of 5 cM to its linked marker Umc1358.

Quantitative trait loci mapping for kernel row number using chromosome segment substitution lines in maize

F. Li, Jia, H. T., Liu, L., Zhang, C. X., Liu, Z. J., and Zhang, Z. X., “Quantitative trait loci mapping for kernel row number using chromosome segment substitution lines in maize”, vol. 13, pp. 1707-1716, 2014.

Unveiling the genetic architecture of grain yield and yield-related traits is useful for guiding the genetic improvement of crop plants. Kernel row number (KRN) per ear is an important yield component, which directly affects the grain yield of maize. In this study, we constructed a set of 130 chromosome segment substitution lines (CSSLs), using Nongxi531 as the donor parent and H21 as recipient parent, by continuous backcrossing and selfing.

QTLs for days to silking in a recombinant inbred line maize population subjected to high and low nitrogen regimes

Z. P. Zheng, Liu, X. H., Huang, Y. B., Wu, X., He, C., and Li, Z., “QTLs for days to silking in a recombinant inbred line maize population subjected to high and low nitrogen regimes”, vol. 11, pp. 790-798, 2012.

Days to silking (DTS) is one of the most important traits in maize (Zea mays). To investigate its genetic basis, a recombinant inbred line population was subjected to high and low nitrogen (N) regimes to detect quantitative trait loci (QTLs) associated with DTS. Three QTLs were identified under the high N regime; these explained 25.4% of the phenotypic variance.

Genetic analysis of two new quantitative trait loci for ear weight in maize inbred line Huangzao4

X. - H. Liu, Zheng, Z. - P., Tan, Z. - B., Li, Z., and He, C., “Genetic analysis of two new quantitative trait loci for ear weight in maize inbred line Huangzao4”, vol. 9, pp. 2140-2147, 2010.

Ear weight is one of the most important agronomic traits considered necessary in maize (Zea mays L.) breeding projects. To determine its genetic basis, a population consisting of 239 recombinant inbred lines, derived from the cross Mo17 x Huangzao4, was used to detect quantitative trait loci (QTLs) for ear weight under two nitrogen regimes. Under a high nitrogen fertilization regime, one QTL was identified in chromosome bin 2.08-2.09, which explained 7.46% of phenotypic variance and an increase in ear weight of about 5.79 g, owing to an additive effect.

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