Seed Vigour of Parental Lines and its Hybrid in Maize (Zea mays L.)

Inheritance of grain yield, heterosis and combining ability were investigated in maize populations obtained from half-diallel crossing among six inbred parental lines. General (GCA) and specific (SCA) combining ability effects were significantly different among parental lines. The grain yield was under the partial gene effect. The parents P1, P3 and P5were considered suitable according to their yield contributing attributes couple with general combining ability effects. The midparentheterosis values ranged from -27.246 (P2 xP5) to 15.209% (P1 xP2) whereas the better parent heterosis values varied between 22.375(P2x P3) to 40.363% (P2 x P5) only seven crosses had higher grain yields. Of those crosses, P1×P2, P2×P5 and P1×P3 were considered most promising hybrids yielding heterosis as 15.880%, 20.363% and 40.363 respectively over their parents. The Agriculturists 2020; 18(1) 18-25

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Investigation on direct and reciprocal crosses in maize ( Zea mays L.)

Acta Agronomica Hungarica ◽

10.1556/aagr.56.2008.2.7 ◽

2008 ◽

Vol 56 (2) ◽

pp. 179-185

Author(s):

Z. Bódi ◽

P. Pepó ◽

A. Kovács

Keyword(s):

Zea Mays ◽

Plant Height ◽

Seed Production ◽

Zea Mays L ◽

Side Branch ◽

Reciprocal Crosses ◽

Positive Correlation ◽

Stalk Diameter ◽

Parental Lines ◽

Medium Correlation

Seven traits of twelve hybrids derived from direct and reciprocal crosses of four parental lines were examined during three years in Hungary. No significant differences were found between the direct and reciprocal crosses for stalk diameter or leaf number over the average of three years in any of the hybrids. Significant differences in the number of primary tassel branches were observed between UDH5 and its reciprocal UDH8, and between UDH6 and its reciprocal UDH11. It was evident in both instances that the degree of heterosis in the reciprocal crosses far exceeded that in the direct ones. A high number of tassel branches was dominant over a low number, so this trait was preferentially inherited in the hybrids. A positive correlation was observed between plant height and main ear attachment height (r = 0.67**). A positive correlation (r = 0.89**) was also found between the length of the main tassel axis above the lowest and above the uppermost side-branch. A medium correlation was observed between the number of primary tassel branches and the plant height (r = −0.42**). The number of primary tassel branches exhibited the highest heterosis. These results can be utilized in practical selection and seed production.

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Influence of sub-optimal imbibition temperatures on seed vigour and respiration in maize (Zea mays L.)

South African Journal of Plant and Soil ◽

10.1080/02571862.1985.10634170 ◽

1985 ◽

Vol 2 (4) ◽

pp. 203-206 ◽

Cited By ~ 6

Author(s):

H. A. van de Venter ◽

N. Grobbelaar

Keyword(s):

Zea Mays ◽

Zea Mays L ◽

Seed Vigour

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Increase in photosynthesis of maize hybrids (Zea mays L.) at suboptimal temperature (15 °C) by selection of parental lines on the basis of chlorophyll a fluorescence measurements

Photosynthetica ◽

10.1007/s11099-005-5134-0 ◽

2005 ◽

Vol 43 (1) ◽

pp. 125-134 ◽

Cited By ~ 8

Author(s):

J. Koscielniak ◽

F. Janowiak ◽

Z. Kurczych

Keyword(s):

Zea Mays ◽

Chlorophyll A ◽

Chlorophyll A Fluorescence ◽

Zea Mays L ◽

Maize Hybrids ◽

Suboptimal Temperature ◽

Fluorescence Measurements ◽

Parental Lines ◽

Selection Of

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Genetic dissection of seed vigour traits in maize (Zea mays L.) under low-temperature conditions

Journal of Genetics ◽

10.1007/s12041-016-0714-2 ◽

2016 ◽

Vol 95 (4) ◽

pp. 1017-1022 ◽

Cited By ~ 4

Author(s):

YONG SHI ◽

GUOHUI LI ◽

ZHIQIANG TIAN ◽

ZHIYONG WANG ◽

XIAOBO WANG ◽

...

Keyword(s):

Zea Mays ◽

Low Temperature ◽

Zea Mays L ◽

Genetic Dissection ◽

Seed Vigour ◽

Temperature Conditions

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Mejoramiento de la línea MLS4-1 de maíz (Zea mays L.) a través del método de retrocruza.

Agronomía Mesoamericana ◽

10.15517/am.v7i1.24791 ◽

2016 ◽

Vol 7 (1) ◽

pp. 62

Author(s):

Jesús Arreola ◽

Gustavo Burciaga ◽

José Gutiérrez ◽

Cristina Vega ◽

Enrique Navarro

Keyword(s):

Zea Mays ◽

Combining Ability ◽

Zea Mays L ◽

Agronomic Traits ◽

Research Work ◽

Source Population ◽

Male Line ◽

Parental Lines ◽

Original Line

This research work involves the improvement of the male line MLS4-1 of the hybrid AN-388 which was released by the Instituto Mexicano del Maíz of the Universidad Autónoma Agraria “Antonio Narro”. This line has excellent combining ability with other parental lines; however, it is susceptible to some diseases so that we are interested in improving it by using the backcross procedure. The Nepo population was used as a source population which is resistant to mildew spp. Three backcrosses and two recombinations were practiced before deriving lines and cross them with some testers. The objectives of this work were: 1. To evaluate the performance of recovered lines in combination with the original line MLS4-1, and with un-related testers, taking into account their combining ability and agronomic traits in relation to the hybrid AN-388, 2. To now the effectiveness of the backcross method to improve the MLS4-1 line. The results of this study allowed us to identify superior recovered lines that, in combination with the diverse testers, exceeded the agronomic value of thehybrid AN-388. Some recovered lines crossed with the MLS4-1 line produced excellent single crosses, indicating the possibility of getting new versions of the hybrid AN-388. Finally, we conclude that the improvement of the MLS4-1 line has permitted us to identify the best lines with higher combining ability and better agronomic traits.

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