Selection for Vegetative Phase and Actual Filling Period Duration in Short Season Maize

Crop Science ◽  
1989 ◽  
Vol 29 (3) ◽  
pp. 607-612 ◽  
Author(s):  
H. Corke ◽  
L. W. Kannenberg
Keyword(s):  
Vegetative Phase ◽  
Short Season ◽  
Selection For ◽  
Period Duration

Selecting for earliness and yield in sorghum at different sites

1991 ◽  
Vol 71 (1) ◽  
pp. 191-194 ◽  
Author(s):  
S. Plett ◽  
L. A. Nelson ◽  
M. D. Clegg
Keyword(s):  
Sorghum Bicolor ◽  
Key Words ◽  
Early Maturity ◽  
Early Maturing ◽  
Short Season ◽  
Selection For ◽  
Different Origins ◽  
Sorghum Bicolor L ◽  
Selection Of

Feasibility of selection of sorghum [Sorghum bicolor (L.) Moench] lines in a long–season environment for early maturity and yield was studied. Fifty-seven male lines from three different origins and F1 progenies produced by crossing the lines to three early-maturing female lines were used for these evaluations. Lines selected for yield had highest yield in a long-season environment but showed no yield advantage in short-season areas. There were lines from all three origins which should be useful in the locations tested. Selection for earliness and yield appeared feasible in a long season area. Key words: Heritability, correlation

scholarly journals Response to Selection for the Timing of Vegetative Phase Transition in a Maize Population

Crop Science ◽  
2002 ◽  
Vol 42 (5) ◽  
pp. 1471-1474 ◽  
Author(s):  
P. Revilla ◽  
R. A. Malvar ◽  
A. Butrón ◽  
W. F. Tracy ◽  
B. G. Abedon ◽  
...  
Keyword(s):  
Phase Transition ◽  
Response To Selection ◽  
Vegetative Phase ◽  
Maize Population ◽  
Selection For

The superokra leaf gene and short-season cotton breeding

1979 ◽  
Vol 19 (100) ◽  
pp. 575
Author(s):  
NJ Thomson
Keyword(s):  
New South ◽  
Row Spacing ◽  
Research Station ◽  
Recurrent Parent ◽  
Normal Leaf ◽  
Backcross Population ◽  
South Wales ◽  
The Mean ◽  
Short Season ◽  
Selection For

The performance of superokra leaf backcross progenies was compared with their normal leaf recurrent parent in two experiments in two successive seasons at Narrabri Research Station in the Namoi River Valley of New South Wales. The first experiment used standard 1 m row spacing and the second both standard and twin-row spacing (two rows sown 25 cm apart on 1 m beds). Other varietal comparisons including short-season and standard types, and normal and superokra leaf types were also made. The mean yield of 220 superokra progenies was 8.4% less than their recurrent parent in the first experiment. The mean yield of 14 of these was 1.2% greater in the second experiment. The superokra leaf progenies were earlier maturing and had a higher lint percentage. Strength and fineness of the progenies compared with the parent varied between experiments. Although mean staple length of the superokra leaf progenies was shorter than the recurrent parent it was demonstrated that selection for longer staple without yield sacrifice was feasible in the backcross population. All short season varieties tested had deficiencies of yield or quality compared with desired standards. The normal leaf Tamcot SP-37 and the superokra leaf M8 variety appeared to have the best combination of earliness and other attributes. There were no significant variety interactions with row spacing. Further study is needed to clarify the usefulness of the superokra leaf gene, because of quality deficiencies and apparent greater instability of varietal performance associated with the gene.

Effect of the year on the vegetative and generative phases in the growing period of maize

2005 ◽  
Vol 53 (2) ◽  
pp. 133-141 ◽  
Author(s):  
L. C. Marton ◽  
T. Szundy ◽  
I. Pók
Keyword(s):  
Diallel Cross ◽  
Grain Filling ◽  
Inbred Lines ◽  
Vegetative Phase ◽  
Late Flowering ◽  
Growing Period ◽  
Dry Conditions ◽  
The Mean ◽  
Selection For ◽  
Generative Phase

The evaluation of an 8 × 8 diallel cross revealed that the mean length of the growing period was the same for inbred lines and their hybrids. However, the vegetative phase was 7-8% shorter and the generative phase 7-8% longer for the hybrids than for the inbred lines. The generative phase of the growing period, unlike the vegetative phase, proved to be extremely variable. Under dry conditions the length of the generative phase was negatively correlated with the length of the vegetative phase. The later a genotype flowered the less time remained for grain filling, due to the stress which curtailed the growing period. The shorter generative phase of late-flowering hybrids was the reason for the weakening of the growing period-yield correlation under dry conditions. This vulnerability of late-flowering hybrids makes selection for stress tolerance particularly important.

Divergent Selection for Vegetative Phase Change in Maize and Indirect Effects on Response to

Crop Science ◽  
2008 ◽  
Vol 48 (3) ◽  
pp. 992 ◽  
Author(s):  
C. F. Basso ◽  
M. M. Hurkman ◽  
E. S. Riedeman ◽  
W. F. Tracy
Keyword(s):  
Phase Change ◽  
Indirect Effects ◽  
Divergent Selection ◽  
Vegetative Phase ◽  
Vegetative Phase Change ◽  
Selection For

Selection for Cold Tolerance during Flowering in Short-Season Soybean

Crop Science ◽  
2013 ◽  
Vol 53 (4) ◽  
pp. 1356-1365 ◽  
Author(s):  
Elroy R. Cober ◽  
Stephen J. Molnar ◽  
Satish Rai ◽  
John F. Soper ◽  
Harvey D. Voldeng
Keyword(s):  
Cold Tolerance ◽  
Short Season ◽  
Selection For

scholarly journals Transition between vegetative phases in maize: genetic effects and variances and associated markers

2009 ◽  
Vol 147 (5) ◽  
pp. 547-554 ◽  
Author(s):  
B. ORDÁS ◽  
L. SERRANO ◽  
A. ORDÁS ◽  
A. BUTRÓN ◽  
P. REVILLA
Keyword(s):  
Phase Transition ◽  
Late Phase ◽  
Genetic Effects ◽  
Vegetative Phase ◽  
Maize Genetic ◽  
Complex Regulation ◽  
Selection For ◽  
Additive Genetic Effects ◽  
Vegetative Phases ◽  
Simple Sequence

SUMMARYTransition from juvenile to adult vegetative phase in maize is associated with pest and disease resistance. However, reports are not consistent on the significance and relative importance of additive or dominance genetic effects and variances. The purpose of the present research was to elucidate the genetic effects and variances and to identify molecular markers associated with phase transition. Three cycles of divergent selection were carried out in a maize synthetic accelerating and delaying phase transition. Three and four inbred lines were released from the third cycles of late phase transition (LPT) and early phase transition (EPT), respectively. Generation mean analyses were performed from two LPT×EPT crosses in order to calculate genetic effects and variances. Markers associated with vegetative phase transition were identified by contrasting simple sequence repeat (SSR) alleles between LPT and EPT inbreds and selection cycles, and by testing whether drift could explain the allelic changes observed in the respective third cycles of selection. Juvenile traits are mainly regulated by additive genetic effects and variances, whereas adult traits have a complex regulation involving dominance and epistatic effects. Based on error variances, EPT improves phenotypic stability. The SSRs phi028, phi112 and umc1725 were associated with selection for phase transition, suggesting that these genome regions are involved in the regulation of vegetative phase transition of maize, although none of the genes previously associated with phase transition has been located in those regions.

Framework for Selecting Vocabulary for Preliterate Children Who Use Augmentative and Alternative Communication

2019 ◽  
Vol 28 (3) ◽  
pp. 1000-1009
Author(s):  
Allison Bean ◽  
Lindsey Paden Cargill ◽  
Samantha Lyle
Keyword(s):  
Language Impairment ◽  
Augmentative And Alternative Communication ◽  
Developmentally Appropriate ◽  
School Age Children ◽  
Alternative Communication ◽  
School Based ◽  
Selection For ◽  
Nonverbal Children ◽  
Grammatical Structures ◽  
Insufficient Knowledge

Purpose Nearly 50% of school-based speech-language pathologists (SLPs) provide services to school-age children who use augmentative and alternative communication (AAC). However, many SLPs report having insufficient knowledge in the area of AAC implementation. The objective of this tutorial is to provide clinicians with a framework for supporting 1 area of AAC implementation: vocabulary selection for preliterate children who use AAC. Method This tutorial focuses on 4 variables that clinicians should consider when selecting vocabulary: (a) contexts/environments where the vocabulary can be used, (b) time span during which the vocabulary will be relevant, (c) whether the vocabulary can elicit and maintain interactions with other people, and (d) whether the vocabulary will facilitate developmentally appropriate grammatical structures. This tutorial focuses on the role that these variables play in language development in verbal children with typical development, verbal children with language impairment, and nonverbal children who use AAC. Results Use of the 4 variables highlighted above may help practicing SLPs select vocabulary that will best facilitate language acquisition in preliterate children who use AAC.

Sign in / Sign up

Export Citation Format

Share Document