Fall Dormancy of Five F 1 Medicago sativa L. Populations, Two Reciprocal F 1 Populations, and Respective Parents 1

Crop Science ◽  
1977 ◽  
Vol 17 (2) ◽  
pp. 327-328 ◽  
Author(s):  
W. J. Knipe ◽  
L. M. Stockton
Keyword(s):  
Medicago Sativa ◽  
Fall Dormancy ◽  
Medicago Sativa L

Root and crown characteristics of alfalfas varying in fall dormancy

1994 ◽  
Vol 74 (1) ◽  
pp. 125-127 ◽  
Author(s):  
N. A. Juan ◽  
C. C. Sheaffer ◽  
D. K. Barnes
Keyword(s):  
Medicago Sativa ◽  
Key Words ◽  
Dry Weight ◽  
Nonstructural Carbohydrate ◽  
Shoot Number ◽  
Fall Dormancy ◽  
Crown Morphology ◽  
Medicago Sativa L ◽  
Crown Characteristics ◽  
Alfalfa Root

We compared root and crown characteristics of five alfalfa (Medicago sativa L.) entries which differed in fall dormancy. Alfalfas were subjected to bud or mid-bloom harvests. The most consistent entry effect occurred for root and crown dry weight and root total nonstructural carbohydrate (TNC) concentrations. Root TNC concentration was highest and root and crown weight were greatest for the nondormant and least in the most dormant entries. Entries did not consistently differ in crown bud numbers, shoot number, or shoot origin. In October, the number of elongated crown buds were greater for a non-fall dormant alfalfa Nitro than for the most fall dormant alfalfa. Key words: Alfalfa, root and crown morphology, fall dormancy, root carbohydrates

Relation between level of autumn dormancy and salt tolerance in lucerne (Medicago sativa)

2018 ◽  
Vol 69 (2) ◽  
pp. 194 ◽  
Author(s):  
Kunyong Huang ◽  
Xiaoxia Dai ◽  
Yiquan Xu ◽  
Shibing Dang ◽  
Tianran Shi ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Medicago Sativa ◽  
Comprehensive Evaluation ◽  
Germination Rate ◽  
Shoot Length ◽  
Salt Treatment ◽  
Fall Dormancy ◽  
Medicago Sativa L ◽  
Subordinate Function ◽  
The Relationship

Experiments were conducted to study the relationship between autumn (fall) dormancy rating (FDR) and salt tolerance of lucerne (alfalfa, Medicago sativa L.). Seeds of eight cultivars with different FDRs (range 2.0–10.2) were germinated in a growth chamber under five concentrations of NaCl (range 0–1.2%). A subordinate function value method was adopted for comprehensive evaluation of salt tolerance of the lucerne cultivars. Seed germination rate and germination potential, and seedling electrolyte leakage, shoot length, root length, fresh weight, root : shoot length ratio, Na+ and K+ concentrations and K+ : Na+ ratio were used as the indices of evaluation. Under 1.2% salt treatment, salt-tolerance ranking of the cultivars was WL656HQ > WL440HQ > WL712HQ > WL525HQ > WL343HQ > WL319HQ > WL363HQ > WL168HQ, with respective FDRs of 9.3, 6.0, 10.2, 8.2, 3.9, 2.8, 4.9 and 2.0. The results of this study show that non-dormant cultivars were generally more salt tolerant than dormant cultivars.

scholarly journals Genome-Wide Identification of Different Dormant Medicago sativa L. MicroRNAs in Response to Fall Dormancy

PLoS ONE ◽  
2014 ◽  
Vol 9 (12) ◽  
pp. e114612 ◽  
Author(s):  
Wenna Fan ◽  
Senhao Zhang ◽  
Hongqi Du ◽  
Xiaoge Sun ◽  
Yinghua Shi ◽  
...  
Keyword(s):  
Medicago Sativa ◽  
Genome Wide ◽  
Fall Dormancy ◽  
Medicago Sativa L

APICA ALFALFA

1983 ◽  
Vol 63 (2) ◽  
pp. 547-549 ◽  
Author(s):  
R. MICHAUD ◽  
C. RICHARD ◽  
C. WILLHMOT ◽  
H. GASSER
Keyword(s):  
Medicago Sativa ◽  
Plant Height ◽  
Food Production ◽  
Winter Survival ◽  
Research Station ◽  
Eastern Canada ◽  
Stem Size ◽  
Fall Dormancy ◽  
Medicago Sativa L

Apica is a new cultivar of alfalfa (Medicago sativa L.) developed at the Agriculture Canada Research Station in Sainte-Foy. License no. 2200 was issued for Apica by the Food Production and Inspection Branch of Agriculture Canada on 26 Feb. 1982. It is similar to Saranac in leaf and stem size, plant height, maturity, regrowth and fall dormancy. It was extensively tested across Eastern Canada and was found to be superior to Saranac, Iroquois, and Thor for yield, persistence and winter survival.Key words: Alfalfa, cultivar, persistence, Medicago sativa, winter survival

Relations between photoperiod, temperature, abscisic acid, and fall dormancy in alfalfa (Medicago sativa)

1988 ◽  
Vol 66 (12) ◽  
pp. 2491-2498 ◽  
Author(s):  
Tony H. H. Chen ◽  
Frank S. C. Chen
Keyword(s):  
Abscisic Acid ◽  
Medicago Sativa ◽  
Acid Content ◽  
Peak Level ◽  
Fresh Weight ◽  
Endogenous Abscisic Acid ◽  
Fall Dormancy ◽  
Medicago Sativa L ◽  
Temperature Interaction ◽  
Abscisic Acid Content

Three alfalfa (Medicago sativa L.) cultivars differing in fall dormancy were examined for endogenous abscisic acid content in relation to fall dormancy. The alfalfa cultivars studied were 'Beaver' (dormant type), 'Lahonton' (semidormant type), and 'Moapa 69' (nondormant type). Alfalfa seedlings were grown in controlled-environment chambers set at a 16-h photoperiod (16 h light: 8 h dark) and 20:15 °C (light:dark) for 55 days. They were cut and then regrown under environmental conditions simulating summer and fall in western Canada. In leaf samples, the ABA level increased from about 200 in 3-week-old plants to more than 1200 ng/g fresh weight in 8-week-old plants. After cutting, abscisic acid levels dropped abruptly and then increased gradually, reaching a peak level at the stage of the appearance of flower buds. The peak of abscisic acid content was highest in 'Beaver', next highest in 'Lahontan', and lowest in the nondormant type, 'Moapa 69'. At the 6th week of regrowth, abscisic acid content in 'Beaver' was found to be 2200 ng/g fresh weight, which is the highest reported level in nonstressed plants of any species. The analysis of variance suggests photoperiod, temperature, and photoperiod × temperature interaction all have a significant effect on alfalfa regrowth and on abscisic acid content. Under long days and cool temperatures, the amount of foliage regrowth and the characteristic of fall dormancy are manifestly correlated. There is no apparent link between endogenous abscisic acid content and fall dormancy.

scholarly journals De Novo Characterization of Fall Dormant and Nondormant Alfalfa (Medicago sativa L.) Leaf Transcriptome and Identification of Candidate Genes Related to Fall Dormancy

PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0122170 ◽  
Author(s):  
Senhao Zhang ◽  
Yinghua Shi ◽  
Ningning Cheng ◽  
Hongqi Du ◽  
Wenna Fan ◽  
...  
Keyword(s):  
Medicago Sativa ◽  
Candidate Genes ◽  
De Novo ◽  
Leaf Transcriptome ◽  
Fall Dormancy ◽  
Medicago Sativa L

Estimación de biomasa aérea de forrajes de invierno bajo riego a través de un dron

2019 ◽  
Vol 12 (4) ◽  
Author(s):  
Francisco Gavi Reyes ◽  
César Botello-Aguillón ◽  
Leonardo Tijerina-Chávez ◽  
Arturo Galvis-Spíndola ◽  
Rodrigo Roblero-Hidalgo
Keyword(s):  
Medicago Sativa ◽  
Avena Sativa ◽  
Medicago Sativa L

E Objetivo: Desarrollar un procedimiento para estimar biomasa con imágenes digitales captadas desde un dron y modelación 3D (ID-Dron-3D) aplicable en alfalfa (Medicago sativa L.) y avena forrajera (Avena sativa L.). Diseño/metodología/aproximación: Con una cámara digital acoplada al dron se obtuvieron imágenes antes de la cosecha de los cultivos, que fueron procesadas con software para luego estimar volumen de biomasa. En cada cultivo se midió altura de la planta y área cosechada, volumen aparente y real de biomasa, y peso de biomasa fresca y seca. Resultados: Con base en el análisis de regresión se obtuvieron modelos lineales a una p<0.05 para predecir: biomasa fresca en avena (R2=0.70) y alfalfa (R2 =0.47); y biomasa seca en avena (R2=0.78) y en alfalfa (R2=0.31) mediante ID-Dron-3D. Limitaciones del estudio/implicaciones: Considerando las R2 de los modelos obtenidos, los resultados en la avena forrajera fueron mejores, respecto a los detectados en alfalfa, lo cual se puede deber a la mayor variabilidad de la cobertura vegetal, ya que, en algunas unidades de muestreo, las plantas de alfalfa no cubrían completamente el suelo. Hallazgos/conclusiones: El rendimiento de biomasa fresca y seca de ambos cultivos se correlacionó significativamente con su respectivo volumen aparente estimado con imágenes digitales tomadas desde un dron y su procesamiento 3D (ID-Dron-3D).

ALFALFA (Medicago sativa L.) CULTIVADA EN CAMPECHE, MÉXICO Y SU INTEGRACIÓN LOCAL EN LA ALIMENTACIÓN DE CORDEROS EN CONFINAMIENTO

2018 ◽  
Vol 11 (9) ◽  
Author(s):  
CC. Castillo-Águilar
Keyword(s):  
Medicago Sativa ◽  
Pennisetum Purpureum ◽  
Medicago Sativa L

Se comparó el uso de diferentes dietas con base en heno de alfalfa cultivada (Medicago sativa L.) en Campeche y su relación con un concentrado comercial y pasto Taiwán (Pennisetum purpureum), T1=concentrado comercial, T2=T1+heno de alfalfa, T3=T1+pasto Taiwán, T4=heno de alfalfa. Se evaluó el comportamiento productivo y metabólico de corderos en sistema intensivo utilizando 20 corderos machos con encaste de Pelibuey, Dorper y Black Belly de 12.5±1 kg de peso vivo (PV). Se midió el consumo de materia seca total (CMS), la ganancia diaria de peso (GDP), la conversión alimenticia (CA), y la digestibilidad in situ de la materia seca (DISMS). También fueron evaluados el pH, nitrógeno amoniacal (NH3) y la concentración de ácidos grasos volátiles (AGV) en líquido ruminal. La mejor GDP en gramos por día, de 234 g (p?0.05) se obtuvo en el T2; en contraste, el T3 mostró la menor GDP. La dieta que incluyó la mezcla de heno de alfalfa y concentrado mejoró significativamente las condiciones de las variables pH, NH3 y AGV (p?0.05).

ALFALFA VARIETIES ZONED IN THE CENTRAL CHERNOZEM ZONE OF THE RUSSIAN FEDERATION

2020 ◽  
Author(s):  
Galina Stepanova
Keyword(s):  
Medicago Sativa ◽  
Dry Matter ◽  
Maximum Yield ◽  
The State ◽  
Average Yield ◽  
State Register ◽  
Independent Evaluation ◽  
Medicago Sativa L ◽  
Alfalfa Varieties ◽  
Central Chernozem

The article describes the main morphological and biological features of alfalfa varieties included in the State register of breeding achievements approved for use in the Central Chernozem zone of Russia. A total of 32 alfalfa varieties are included in the State register. This is 9 varieties of blue alfalfa (Medicago sativa L. subsp. Sativa) of domestic selection and 8 foreign, 11 varieties of variable alfalfa (Medicago sativa L. nothosubsp. varia (Martyn) Arcang.) domestic selection and 1 variety of foreign and 3 varieties of yellow alfalfa (Medicago sativa L. subsp. falcata (L.) Arcang.). It shows the average and maximum yield of varieties determined in the process of state variety testing, as well as independent evaluation in research institutions in the region. Varieties of blue alfalfa of domestic selection Kevsala, Elena, Satellite, Vavilovskaya Yubileynaya were the most productive. The average yield of dry matter of these varieties reaches 8.4–9.2 t/ha, the maximum — 15.3–17.7 t/ha. Alfalfa varieties Timbale and Galaxy were the most productive among foreign varieties: the average yield of dry matter was 8.1 and 8.3 t/ha, the maximum – 15.5 and 17.2 t/ha. Varieties of alfalfa variable Vitalina and Vela provided an average yield of dry matter of 7.6 and 9.0 t/ha, the maximum yield reached 15.4 and 18.1 t/ha.

Szennyvíziszappal kezelt Medicago sativa L. növekedésének és rizoszféra tulajdonságainak monitorozása modellkísérletben

2008 ◽  
Vol 57 (1) ◽  
pp. 113-132 ◽  
Author(s):  
Attila Palágyi ◽  
Hamuda Hosam E. A. F. Bayoumi ◽  
Nikoletta Tóth ◽  
Mihály Kecskés
Keyword(s):  
Medicago Sativa ◽  
Medicago Sativa L

A szennyvíziszappal kezelt talajok minőségének meghatározásához elengedhetetlen a biológiai mutatók jellemzése. Jelen tanulmány célja az volt, hogy modellkísérlet segítségével megvizsgáljuk a talajokhoz (barna erdőtalaj és réti csernozjom) különböző arányban (0, 20, 40, 60 és 100% iszap:talaj) hozzáadott szennyvíziszap hatását a talaj pH-értékére, nedvességtartalmára és légzésére, valamint termőképességére (növényi szárazanyag-tartalom), enzimatikus tulajdonságaira és az ott élő mikrobiális közösségekre.Modellkísérletben, eltérő arányú iszap/talaj keveréken termesztettünk lucernát 63 napon keresztül. Mértük a relatív növényi szárazanyag-tartalmat, valamint a talaj pH-értékének és nedvességtartalmának a változását. Megvizsgáltuk továbbá a rizoszféra mikrobiális összetételét (aerob heterotróf baktériumok, aerob heterotróf spórások, cellulózbontók és foszfátoldók, fuorescens Pseudomonas ok, Sinorhizo-biummeliloti , aktinomicéták, fonalas gombák, valamint élesztők csíraszámát) és a különböző enzimek (FDA, dehidrogenáz, kataláz, ureáz, proteáz, foszfatáz, β-glükozidáz és aril-szulfatáz) aktivitását. Ugyancsak meghatároztuk a kibocsátott CO 2 alapján a talajlégzés mértékét.Eredményeink azt mutatják, hogy a szennyvíziszap hozzáadásával a talaj hosszabb ideig megőrizte nedvességtartalmát, mint a kontroll (100% talaj/0% iszap), valamint emelkedett a talaj pH-értéke is. A növények egészséges fejlődésén és növekedésén kívül, a legnagyobb növényi szárazanyag-tömeget is a nagy szennyvíziszap tartalmú minták (60–100% iszap) esetében mértük. A minták szennyvíziszap- koncentrációjának emelésével jelentősen nőtt a tenyészthető mikrobiális populációk sűrűsége is a lucerna rizoszférájában.A leggyakrabban előforduló baktériumok a következő genus okhoz tartoztak: Acinetobacter, Azotobacter, Bacillus, Brevundimonas, Cellulomonas, Chromo-bacterium, Corynebacterium, Enterobacter, Escherichia, Flavobacterium, Klebsiella, Micrococcus, Proteus, Pseudomonas, Sinorhizobium, Serratia, Stenotrophomonas, Streptococcus, Streptomyces és Zooglea . A legmagasabb fonalasgomba-populációkat a barna erdőtalajban mértük, mindkét (hódmezővásárhelyi és nyíregyházi) szennyvíziszap jelenlétében. A leggyakoribb izolátumok az Altenaria, Aspergillus, Cephalosporium, Cladosporium, Fusarium, Geotrichum, Mucor, Penicillium, Rhizopusés _s

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