Associations among Forage Quality Traits, Vigor, and Disease Resistance in Alfalfa

Several linkage maps, mainly based on anonymous markers, are now available for Lolium perenne . The saturation of these maps with markers derived from expressed sequences would provide information useful for QTL mapping and map alignment. Therefore, we initiated a study to develop and map DNA markers in genes related to self-incompatibility, disease resistance, and quality traits such as digestibility and sugar content in two L. perenne families. In total, 483 and 504 primer pairs were designed and used to screen the ILGI and CLO-DvP mapping populations, respectively, for length polymorphisms. Finally, we were able to map 67 EST markers in at least one mapping population. Several of these markers coincide with previously reported QTL regions for the traits considered or are located in the neighbourhood of the self-incompatibility loci, S and Z. The markers developed expand the set of gene-derived markers available for genetic mapping in ryegrasses.

Download Full-text

Genome-Wide Association Mapping and Genomic Selection for Alfalfa (Medicago sativa) Forage Quality Traits

PLoS ONE ◽

10.1371/journal.pone.0169234 ◽

2017 ◽

Vol 12 (1) ◽

pp. e0169234 ◽

Cited By ~ 44

Author(s):

Elisa Biazzi ◽

Nelson Nazzicari ◽

Luciano Pecetti ◽

E. Charles Brummer ◽

Alberto Palmonari ◽

...

Keyword(s):

Association Mapping ◽

Medicago Sativa ◽

Genomic Selection ◽

Forage Quality ◽

Genome Wide Association ◽

Quality Traits ◽

Genome Wide ◽

Selection For

Download Full-text

Floricultural Quality Traits and Probing Mechanisms of Silicon Mediated Disease Resistance of Dendrobium

OUSL Journal ◽

10.4038/ouslj.v10i0.7333 ◽

2016 ◽

Vol 10 (0) ◽

pp. 23

Author(s):

Darshani Weerahewa

Keyword(s):

Disease Resistance ◽

Quality Traits

Download Full-text

Genetic Variance and Correlation of Forage Yield and Quality Traits in Tropically Adapted Maize

Sains Malaysiana ◽

10.17576/jsm-2021-5001-05 ◽

2021 ◽

Vol 50 (1) ◽

pp. 45-52

Author(s):

Nazatul Shima Naharudin ◽

Maizura Abu Sin ◽

Ghizan Saleh

Keyword(s):

Selection Criteria ◽

Biomass Yield ◽

Lignin Content ◽

Forage Quality ◽

Yield Traits ◽

Quality Traits ◽

Broad Sense Heritability ◽

Genetic Advance ◽

Plant Yield ◽

Acid Detergent Lignin

Two F2 populations segregating for biomass yield and forage quality traits were developed from two separate crosses of tropically adapted maize inbred lines. The parental, F1 and F2 generations of both crosses were evaluated to estimate broad sense heritability, genetic advance and correlations for these traits to suggest the best traits as selection criteria towards breeding forage maize with high yield and quality.In Cross 1, biomass yield trait with the highest broad-sense heritability was plant height (70.03%), whereas forage quality trait with the highest heritability estimate was crude protein content (66.60%). Heritability estimates in Cross 2 were high for all biomass yield traits and forage quality traits (>50% for all traits). Indigestible cell wall component represented by acid detergent lignin content was found to be highly heritable in both populations. High genetic advance as percent of mean were found for fresh and dry plant yield as well as for lignin content in both populations. Correlation analysis on all traits showed that all biomass yield components were significantly correlated. All traits related to cell wall content were positively correlated and acid detergent lignin was positively correlated with dry plant yield. Traits with high to moderate heritability and high predicted genetic advance, namely plant height, fresh plant yield and protein content can be used as selection criteria to improve maize biomass yield and nutritive quality for forage utilization. Selecting for higher biomass yield would also result in selecting individuals with higher lignin content as shown by the correlation analysis.

Download Full-text

Impact of Abiotic Stress on Quality Traits of Maize Forage at Two Growth Stages

Journal of Horticulture and Plant Research ◽

10.18052/www.scipress.com/jhpr.7.60 ◽

2019 ◽

Vol 7 ◽

pp. 60-68

Author(s):

S.H. Mohammed ◽

Maarouf I. Mohammed

Keyword(s):

Abiotic Stress ◽

Nutritive Value ◽

Salt Water ◽

Forage Quality ◽

Stress Conditions ◽

Forage Yield ◽

Growth Stages ◽

Stressed Condition ◽

Quality Traits ◽

Compound Effect

Maize (Zeamays L.) forage quality traits are reported to show varying responses to abiotic stress. Four trials were conducted in Sudan (Africa) during the summer and winter seasons (2013 – 2014) at two locations: Shambat (normal soils) and Soba (salt affected soils) to investigate the effects of abiotic stress on the nutritive value of maize forage. In each trial nine maize genotypes were studied under two watering regimes arranged in split plot experiment in randomized complete block design. The compound effect of salt, water and heat stresses created by the combination of locations, seasons and watering regimes were used to investigate the effect of abiotic stress on forage quality at silk initiation and dough growth stages. Character associations under stressed and none stressed conditions were studied. NDF, ADF, CP, forage yield and related traits were measured. Abiotic stress significantly lowered the nutritive value in terms of crude protein, digestibility and intake potential. Digestibility under stressed condition was slightly improved as growth stage advanced from silk initiation to dough stage. Correlations under non stress conditions between forage yield and quality traits were either favorable with NDF and weak or insignificant with ADF and CP. Under stress conditions, similar trend generally exists apart from the unfavorable correlation of CP with each of yield and ADF, in addition to earliness with NDF. The compound effect of salt, water and heat stresses have adverse impact on the nutritive value of maize forage. Varieties combining high performance in quality and forage yield could be developed under non-stressed or stressed conditions.

Download Full-text