Effects of nuclear restorer genes on the cytochrome content of corn pollen mitochondria

1976 ◽  
Vol 54 (23) ◽  
pp. 2718-2725 ◽  
Author(s):  
L. S. Watrud ◽  
J. R. Laughnan ◽  
S. J. Gabay ◽  
D. E. Koeppe
Keyword(s):  
Zea Mays ◽  
Cytochrome Oxidase ◽  
Zea Mays L ◽  
Pollen Grains ◽  
Inbred Lines ◽  
Difference Spectroscopy ◽  
Male Sterile ◽  
Restorer Genes ◽  
Male Sterile Cytoplasm ◽  
Cytochrome Content

Mitochondria were isolated from mature pollen grains of corn (Zea mays L.) having normal (N) or restored Texas male-sterile (TRf) cytoplasm. Comparison of the cytochrome content of the two sources by low-temperature difference spectroscopy indicates that inbred lines carrying nuclear restorer genes and T cytoplasm have an increased cytochrome oxidase content. A lower cytochrome oxidase concentration was found in mitochondria isolated from anthers of nonrestored Texas (cms-T) male-sterile cytoplasm corn than from those isolated from nonexserted anthers of N or TRf plants. Mitochondria in nonsporogenous tissue of cms-T anthers collected just before the time of anthesis of N plants had fewer well defined cristae than mitochondria in comparable anther tissue of N or TRf plants.

STEM MORPHOLOGY AND ANATOMY IN ZEA MAYS AS INFLUENCED BY CYTOPLASMIC MALE STERDLITY AND RESTORER GENES

1976 ◽  
Vol 56 (2) ◽  
pp. 249-255 ◽  
Author(s):  
PATRICIA SARVELLA ◽  
C. O. GROGAN
Keyword(s):  
Zea Mays ◽  
Histological Examination ◽  
Cross Sections ◽  
Vascular Bundle ◽  
Zea Mays L ◽  
Cell Number ◽  
Normal Male ◽  
Male Sterile ◽  
Restorer Genes

The stem morphology of three versions (normal, male-sterile, and restored) of five lines of corn (Zea mays L.) was examined. Corn stems in both the male-sterile (Texas cytoplasm) and restored versions of line Mp466 were shorter than the normal version. Stem diameters were less in the male-sterile version in two of the five lines examined. Histological examination of the three versions in line CI21 showed that vascular bundle radial diameters in cross sections were less in the male-sterile tassel culms than the normal. Reduction in the amount of phloem appeared to be the cause. Cells in longitudinal sections appeared to be about the same length in all versions, or shorter in the normal; therefore, shortening of the male-sterile stems apparently results from a reduction in cell number.

The Influence of the Phosphorus and Zinc Fertilization on Some Morphological Characteristics of Maize Inbred Lines (Zea mays L.)

1999 ◽  
Vol 27 (3) ◽  
pp. 307-314
Author(s):  
Gordana Bukvić ◽  
Tihana Teklić ◽  
Mirta Marketić
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Morphological Characteristics ◽  
Inbred Lines ◽  
Maize Inbred Lines ◽  
Zinc Fertilization

scholarly journals Biplot Analysis of Line × Tester Data of Maize (Zea mays L.) Inbred Lines under Stress and Nonstress Environments

2019 ◽  
Vol 47 (3) ◽  
pp. 518-530 ◽  
Author(s):  
B. Badu-Apraku ◽  
R.O. Akinwale
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Inbred Lines ◽  
Biplot Analysis

Test Cross Mean Performance and Combining Ability Study of Elite Lowland Maize (Zea mays L.) Inbred Lines at Melkassa, Ethiopia

2014 ◽  
Vol 02 (04) ◽  
Author(s):  
Tessema Tamirat Sentayehu Alamerew ◽  
Dagne Wegary Temesgen Menamo
Keyword(s):  
Zea Mays ◽  
Combining Ability ◽  
Zea Mays L ◽  
Inbred Lines ◽  
Test Cross

THE GENETICS OF FERTILITY RESTORATION IN CYTOPLASMIC MALE-STERILE RYE

1979 ◽  
Vol 21 (3) ◽  
pp. 417-422 ◽  
Author(s):  
G. J. Scoles ◽  
L. E. Evans
Keyword(s):  
Secale Cereale ◽  
Fertility Restoration ◽  
Inbred Lines ◽  
Male Sterile ◽  
Male Sterile Line ◽  
Cytoplasmic Male Sterile ◽  
Restorer Genes ◽  
Secale Cereale L ◽  
Partial Fertility

Three inbred lines of rye (Secale cereale L.) known to be capable of restoring fertility to a cytoplasmic male-sterile line were crossed with the sterile line. The proportions of male fertile, partially male fertile and male sterile plants in F2 and backcross progenies indicated that three dominant restorer genes were present in each line. These were designated Rf1, Rf2 and Rf3, their relative expressivity was Rf1>Rf2>Rf3. Expressivity was dependent upon environment. Partial fertility occurred when certain genotypes carried two of the three alleles as dominant, but was dependent upon genotype and environment.

Genetic improvement of cell-wall digestibility in forage maize (Zea mays L.). I. Performance of inbred lines and related hybrids

Euphytica ◽  
1992 ◽  
Vol 65 (3) ◽  
pp. 187-194 ◽  
Author(s):  
O. Dolstra ◽  
J.H. Medema ◽  
A.W. de Jong
Keyword(s):  
Cell Wall ◽  
Zea Mays ◽  
Genetic Improvement ◽  
Zea Mays L ◽  
Inbred Lines ◽  
Forage Maize ◽  
Cell Wall Digestibility

Somatic Embryogenesis and Plant Regeneration from Immature Embryos of Tropical Maize (Zea mays L.) Inbred Lines

2008 ◽  
Vol 7 (2) ◽  
pp. 224-232 ◽  
Author(s):  
O. Ombori ◽  
N.M. Gitonga ◽  
J. Machuka
Keyword(s):  
Zea Mays ◽  
Somatic Embryogenesis ◽  
Plant Regeneration ◽  
Zea Mays L ◽  
Inbred Lines ◽  
Immature Embryos ◽  
Tropical Maize
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