scholarly journals Gains in recurrent selection cycles for grain yield and resistance to head smut in maize

2020 ◽  
Vol 39 (1) ◽  
Author(s):  
Gelasino Díaz-Ramírez ◽  
Carlos De León-García de Alba ◽  
Daniel Nieto-Ángel ◽  
Ma. del Carmen Mendoza-Castillo
Keyword(s):  
Grain Yield ◽  
Recurrent Selection ◽  
Head Smut ◽  
Sporisorium Reilianum ◽  
Para Determinar

El basidiomiceto <em>Sporisorium reilianum</em> f. sp. <em>zeae</em> infecta al cultivo de maíz y causa importantes pérdidas en regiones donde existen condiciones propicias para el desarrollo de la enfermedad. En este trabajo se evaluó la respuesta a la selección de seis ciclos de selección recurrente de maíces de endospermo blanco y cinco ciclos de maíces de endospermo amarillo para caracteres agronómicos deseables, rendimiento de grano y resistencia al carbón de la espiga. Los diferentes ciclos en las dos poblaciones se obtuvieron siguiendo el método de selección recurrente de familias S1, los cuales fueron evaluados para determinar el avance genético. En un ensayo anexo, las poblaciones fueron inoculadas artificialmente para medir el progreso de la resistencia a la enfermedad y evaluar un nuevo método de inoculación. Se utilizó un diseño experimental de bloques completos al azar con tres repeticiones para el ensayo de rendimiento y dos repeticiones para el ensayo inoculado. Los ciclos evaluados en las dos poblaciones mostraron un incremento en la resistencia de 0.94 y 1.2% ciclo-1, una ganancia genética para rendimiento de grano de 272.9 y 620 kg ha-1 ciclo-1 para la población blanca y amarilla, respectivamente. Los resultados mostraron que la selección recurrente de familias S1 fue eficiente para mejorar el rendimiento de grano y resistencia al carbón de la espiga en ambas poblaciones.

scholarly journals Selección para calidad fisiológica de la semilla y rendimiento en líneas S2 derivadas de cuatro poblaciones tropicales de maíz (Zea mays L.)

2016 ◽  
Vol 7 (1) ◽  
pp. 58
Author(s):  
Enrique Navarro ◽  
Cristina Vega ◽  
Fernando Narváez ◽  
Hugo Córdova
Keyword(s):  
Genetic Variability ◽  
Grain Yield ◽  
Recurrent Selection ◽  
Zea Mays L ◽  
Agronomic Traits ◽  
Reciprocal Recurrent Selection ◽  
Laboratory Conditions ◽  
Flower Plant ◽  
Ear Height ◽  
Field And Laboratory Conditions

This study was carried out in 1993 to evaluate S2 lines from four maize tropical populations improved by reciprocal recurrent selection. These lines were evaluated under field and laboratory conditions, the latter one to determine physiology quality. The main goal was to measure genetic variability within and among populations for traits such as grain yield, vigor and germination and to select the best lines under field and laboratory conditions. The combined analysis of variance showed great genetic variability among the S2 lines within and among populations for grain yield, days to flower, plant and ear height, among others. The maximum genetic variability was observed on the lines from population 43 and pool 23 for most of the traits, although the latter showed a greater genetic variability for grain yield. Besides, it is important to mention that the above populations included the best genotypes for grain yield, germination and vigor. Taking into account the above mentionel agronomic traits, fifteen lines were selected; 2 belong to population 43* pool 20, 2 from pool 19* pool 23, 8 from population 43, and 3 from pool 23. These results confirm the genetic superiority of the lines from populations 43 and pool 23, so that these populations should be recommended for future genetic improvement by reciprocal recurrent procedures.

Breeding for Grain Yield Stability Using Full‐Sib Family Recurrent Selection in Sorghum

Crop Science ◽  
1996 ◽  
Vol 36 (5) ◽  
pp. 1083-1087 ◽  
Author(s):  
M. Chisi ◽  
P. J. Bramel‐Cox ◽  
M. D. Witt ◽  
M. M. Claassen ◽  
D. J. Andrews
Keyword(s):  
Grain Yield ◽  
Recurrent Selection ◽  
Yield Stability

Recurrent Selection for Grain Yield in Durum Wheat

Crop Science ◽  
1995 ◽  
Vol 35 (3) ◽  
pp. 714-719 ◽  
Author(s):  
O. B. Olmedo‐Arcega ◽  
E. M. Elias ◽  
R. G. Cantrell
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Recurrent Selection ◽  
Selection For

Genetic Advance in Grain Yield and Other Traits in Two Tropical Maize Composites Developed via Reciprocal Recurrent Selection

Crop Science ◽  
2018 ◽  
Vol 58 (6) ◽  
pp. 2360-2369
Author(s):  
Adesike O. Kolawole ◽  
Abebe Menkir ◽  
Essie Blay ◽  
Kwadwo Ofori ◽  
Jennifer G. Kling
Keyword(s):  
Grain Yield ◽  
Recurrent Selection ◽  
Genetic Advance ◽  
Reciprocal Recurrent Selection ◽  
Tropical Maize

scholarly journals Inhibition of the spread of endophytic Sporisorium reilianum renders maize resistance to head smut

2015 ◽  
Vol 3 (2) ◽  
pp. 87-95 ◽  
Author(s):  
Xianrong Zhao ◽  
Jianrong Ye ◽  
Lai Wei ◽  
Nan Zhang ◽  
Yuexian Xing ◽  
...  
Keyword(s):  
Head Smut ◽  
Sporisorium Reilianum ◽  
Maize Resistance

A recurrent selection programme for grain yield in winter barley

Euphytica ◽  
1988 ◽  
Vol 37 (2) ◽  
pp. 105-110 ◽  
Author(s):  
G. Delogu ◽  
C. Lorenzoni ◽  
A. Marocco ◽  
P. Martiniello ◽  
M. Odoardi ◽  
...  
Keyword(s):  
Grain Yield ◽  
Recurrent Selection ◽  
Winter Barley ◽  
Selection Programme

scholarly journals Performance and grain yield stability of maize populations developed using marker-assisted recurrent selection and pedigree selection procedures

Euphytica ◽  
2015 ◽  
Vol 208 (2) ◽  
pp. 285-297 ◽  
Author(s):  
Yoseph Beyene ◽  
Kassa Semagn ◽  
Stephen Mugo ◽  
Boddupalli M. Prasanna ◽  
Amsal Tarekegne ◽  
...  
Keyword(s):  
Grain Yield ◽  
Recurrent Selection ◽  
Yield Stability ◽  
Selection Procedures ◽  
Maize Populations ◽  
Pedigree Selection

Future progress in drought tolerance in maize needs new secondary traits and cross combinations

2008 ◽  
Vol 146 (3) ◽  
pp. 287-300 ◽  
Author(s):  
P. MONNEVEUX ◽  
C. SANCHEZ ◽  
A. TIESSEN
Keyword(s):  
Drought Tolerance ◽  
Grain Yield ◽  
Recurrent Selection ◽  
Selection Index ◽  
Gene Pyramiding ◽  
Dry Weight ◽  
Continuous Selection ◽  
Optimal Choice ◽  
Secondary Traits ◽  
The Relationship

SUMMARYThe use of secondary traits such as number of ears per plant, grains per ear, the interval from anthesis to silking, leaf senescence and leaf rolling, together with management of water stress and recurrent selection, have permitted a considerable increase in drought tolerance in the CIMMYT maize source germplasm populations Drought Tolerant Population (DTP) and La Posta Sequía (LPS). Inbred lines were extracted from DTP C9 and LPS C7 cycles and then used for generating single and three-ways hybrids. These were evaluated under normal irrigation and managed drought conditions. A weak, and in some cases no longer significant, correlation was found between grain yield and the traits initially used for selection. Most prominently, the relationship between anthesis-silking interval and grain yield became much weaker in these hybrids. Conversely, significant negative correlations were found between tassel dry weight and grain yield. Three-way hybrids involving two DTP lines yielded more than those involving one only, indicating the feasibility of gene pyramiding for drought tolerance. Overall, the results suggested that the relationship between grain yield and secondary traits has been modified due to continuous selection in the LPS and DTP populations. Some long-established secondary traits have become less important, while others have become more relevant. Mean grain weight, previously not used within a drought selection index, was strongly correlated with yield in the present study. The importance of traits related to the availability in C products for the development of ears and grains are discussed. The results indicate that the traits of source organs contribute marginally to drought tolerance; variation of leaf or root traits seems to be less important than variation in tassel parameters for increasing drought tolerance. For ensuring further progress in drought tolerance in maize, the solution might reside in the manipulation of sink organs. It is therefore suggested that selection for even greater number of ears, bigger grains and smaller tassels may help to increase grain yield under water limited environments in the near future. A short discussion on the optimal choice of parental lines for developing hybrids with maximum expression of drought tolerance concludes the paper.

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