Response to indirect selection in ratoon of sugarcane seedlings

Effectiveness of indirect selection criteria for brix yield based on 4 primary characters (number of millable canes per stool, NMC), cane diameter, cane height, and hand refractometer brix (HR Brix) was studied. A general index involving these traits was studied in 3 populations of ratoon seedlings. Selection based on number of millable canes was best, followed by selection based on selection index and cane height in ratoon crop. The differences in mean performance in ratoon crop disappeared at the evaluation stage in the clonal nursery under normal and restricted irrigated conditions. In general, all selection criteria, except selection based on HR Brix, gave similar responses for brix yield. Low repeatability of traits, insignificant regression coecients, and low proportion of clones outyielding the best standard variety CoH 35 at selection and evaluation stages indicated the ineffectiveness of selection at the single-stool ratoon seedlings stage. The reasons for ineffectiveness of selection based on the selection index are discussed.

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Analysis of Direct and Indirect Selection and Indices in Bread Wheat (Triticum aestivum L.) Segregating Progeny

International Journal of Agronomy ◽

10.1155/2018/8312857 ◽

2018 ◽

Vol 2018 ◽

pp. 1-11 ◽

Cited By ~ 6

Author(s):

Zine El Abidine Fellahi ◽

Abderrahmane Hannachi ◽

Hamenna Bouzerzour

Keyword(s):

Bread Wheat ◽

Yield Components ◽

Selection Criteria ◽

Flag Leaf ◽

Selection Index ◽

Triticum Aestivum L ◽

Indirect Selection ◽

Selection Methods ◽

Simultaneous Selection ◽

Selection Of

Three selection methods including direct and indirect selection along with selection index based on the phenotypic values of eleven traits of agronomic interest were assessed for their application in F4 bread wheat progenies. Significant genetic variation existed among parents and crosses for the traits measured. The following were the most efficient indices for simultaneous selection of superior lines for yield and its components: base index of Williams, followed by the sum of ranks index of Smith and Hazel. The selection-based index provided the highest grain yield gains as compared to the other selection criteria, except for flag leaf area, indicating that the direct and indirect monotrait selection were not appropriate in the situation analyzed in this work. PCA identified Ain Abid × Mahon-Demias, Ain Abid × Rmada, and Ain Abid × El-Wifak as the most promising populations. At 5% selection intensity, the top 30 lines selected were distinguished, in comparison with the standard check Hidhab, by significant improvements in yield and yield components.

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A New Approach to Select Doubled Haploid Rice Lines under Salinity Stress Using Indirect Selection Index

Rice Science ◽

10.1016/j.rsci.2021.05.007 ◽

2021 ◽

Vol 28 (4) ◽

pp. 368-378

Author(s):

Muhammad Fuad Anshori ◽

Bambang Sapta Purwoko ◽

Iswari Saraswati Dewi ◽

Sintho Wahyuning Ardie ◽

Willy Bayuardi Suwarno

Keyword(s):

Salinity Stress ◽

Doubled Haploid ◽

Selection Index ◽

Indirect Selection ◽

New Approach

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Spectral Reflectance Indices as a Potential Indirect Selection Criteria for Wheat Yield under Irrigation

Crop Science ◽

10.2135/cropsci2005.0059 ◽

2006 ◽

Vol 46 (2) ◽

pp. 578-588 ◽

Cited By ~ 110

Author(s):

M. A. Babar ◽

M. P. Reynolds ◽

M. van Ginkel ◽

A. R. Klatt ◽

W. R. Raun ◽

...

Keyword(s):

Spectral Reflectance ◽

Selection Criteria ◽

Wheat Yield ◽

Indirect Selection ◽

Reflectance Indices ◽

Spectral Reflectance Indices

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Multivariate analysis and determination of the best indirect selection criteria to genetic improvement the biological nitrogen fixation ability in common bean genotypes (Phaseolus vulgaris L.)

Genetika ◽

10.2298/gensr1202279g ◽

2012 ◽

Vol 44 (2) ◽

pp. 279-284 ◽

Cited By ~ 1

Author(s):

Reza Golparvar

Keyword(s):

Nitrogen Fixation ◽

Common Bean ◽

Biological Nitrogen Fixation ◽

Genetic Improvement ◽

Selection Criteria ◽

Block Design ◽

Indirect Selection ◽

Shoot Number ◽

Biological Yield ◽

Biological Nitrogen

In order to determine the best indirect selection criteria for genetic improvement of biological nitrogen fixation, sixty four common bean genotypes were cultivated in two randomized complete block design. Genotypes were inoculated with bacteria Rhizobium legominosarum biovar Phaseoli isolate L-109 only in one of the experiments. The second experiment was considered as check for the first. Correlation analysis showed positive and highly significant correlation of majority of the traits with percent of nitrogen fixation. Step-wise regression designated that traits percent of total nitrogen of shoot, number of nodule per plant and biological yield accounted for 92.3 percent of variation exist in percent of nitrogen fixation. Path analysis indicated that these traits have direct and positive effect on percent of nitrogen fixation. Hence, these traits are promising indirect selection criteria for genetic improvement of nitrogen fixation capability in common bean genotypes especially in early generations.

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