scholarly journals Genetic variability studies involving maintainers on maldandi and milo source of male sterility in rabi sorghum [Sorghum bicolor (L.) Moench]

2020 ◽  
Vol 11 (02) ◽  
Keyword(s):  
Genetic Variability ◽  
Sorghum Bicolor ◽  
Male Sterility ◽  
Sorghum Bicolor L

scholarly journals Comportamiento agronómico de dos sistemas de androesterilidad en sorgo (Sorghum bicolor L. Moench).

2016 ◽  
Vol 6 ◽  
pp. 104
Author(s):  
Víctor Pecina ◽  
Enrique Navarro ◽  
Héctor Williams ◽  
Raúl Rodríguez
Keyword(s):  
Experimental Design ◽  
Genetic Variability ◽  
Grain Yield ◽  
Sorghum Bicolor ◽  
Male Sterility ◽  
Plant Height ◽  
Agronomic Traits ◽  
Fertility Restoration ◽  
Similar Response ◽  
Sorghum Bicolor L

The limited genetic variability of sorghum and the use of only one type of malesterility system (Milo-Kafir, cytoplasm A1) for the production hybrid seed, make this crop susceptible to diseases, thus its importance to look for new male sterility sources, as the cytoplasm A2 reported in 1977. This systems was introduced to the elite lines of the sorghum program at the Rio Bravo Experiment Station (INIFAP-CIRNE), in Tamaulipas, Mexico. The objective of this assay was to: a) compare the agronomic traits of two male-sterility systems (A1 and A2 cytoplasms), and b) determine if there are differences of the fertility restoration in the isocytoplasmic hybrids. The experimental design was a 7 x 7 lattice with four replications. The results indicate that there are no differences among the two male-sterility systems (Al and A2 cytoplasms) in grain yield, plant height and panicIe length; whereas in days to blooming. the A2 cytoplasm was a day late than the Al cytoplasm. Different restoration responses were found in the hybrids, as the R LRB-63 line which partially restored fertility in the two types of cytoplasms, while CS-3541 showed a similar response with the LRB-l02A, LRB-104A and LRB- 1l0A lines in the A2 cytoplasm.

scholarly journals Combining ability and heterosis as influenced by male-sterility inducing cytoplasms in sorghum [Sorghum bicolor (L.) Moench]

Euphytica ◽  
2006 ◽  
Vol 154 (1-2) ◽  
pp. 153-164 ◽  
Author(s):  
Belum V. S. Reddy ◽  
S. Ramesh ◽  
P. Sanjana Reddy ◽  
B. Ramaiah
Keyword(s):  
Sorghum Bicolor ◽  
Male Sterility ◽  
Combining Ability ◽  
Sorghum Bicolor L

GENETIC VARIABILITY OF YIELD IN F2 POPULATIONS OF GRAIN SORGHUM SORGHUM BICOLOR (L.) MOENCH

1971 ◽  
Vol 13 (1) ◽  
pp. 101-104
Author(s):  
C. R. Reddy ◽  
George H. Liang
Keyword(s):  
Genetic Variability ◽  
Grain Yield ◽  
Sorghum Bicolor ◽  
Variance Components ◽  
Grain Sorghum ◽  
Environmental Variance ◽  
Population Means ◽  
Effective Selection ◽  
Sorghum Bicolor L

Plant-to-plant genetic variability was estimated for F2 grain yield from 10 sorghum populations. The higher-yielding parents tended to produce greater genetic variability in F2, with larger population means, possibly because of the accumulation of desirable genes. The genetic variability in most populations did not seem to be sufficient for effective selection as evidenced by the ratio between estimated genetic and environmental variances. Incorporating diverse exotic materials in the current germplasm is suggested. Using heritability without examining the magnitudes of genetic and environmental variance components may be misleading in certain cases.

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