Seed pod shattering in the genus Lotus (Fabaceae): A synthesis of diverse evidence

1996 ◽  
Vol 76 (3) ◽  
pp. 447-456 ◽  
Author(s):  
William F. Grant
Keyword(s):  
Management Practices ◽  
Recurrent Selection ◽  
Somatic Hybridization ◽  
Lotus Corniculatus ◽  
Birdsfoot Trefoil ◽  
Pod Shattering ◽  
Seed Loss ◽  
High Heritability ◽  
Bridge Species ◽  
Interspecific Somatic Hybridization

Birdsfoot trefoil (Lotus corniculatus L.) is a perennial dehiscent species with an indeterminate growth habit. Pod shattering has been a major problem as seed loss is high due to the continuous flowering and time of pod maturity. The anatomy of the pod plays a role in pod shattering. A change in the orientation of the cells in the pericarp in which unequal swelling and shrinkage occur and a lower lignification of the mesocarp have been considered as major causes. The relative humidity (RH) at the time of harvest is also a major factor. The critical RH for dehiscence varies with genotypes between 35 and 49%. Pod dehiscence is uncorrelated with plants grown to maturity under green house conditions and the same plants grown in the field. Management practices (timing of the harvest, clipping early in the season, misting, mowing and turning the windrow during drying, desiccants) have not been successful to control pod shattering. Shattering resistance is a character of high heritability and in Lotus is considered to be controlled by more than one gene. Breeding to reduce shattering through recurrent selection has been unsuccessful. Attempts to transfer the indehiscent seed pod trait from distantly related indehiscent species via interspecific hybridization, diploid bridge species, amphidiploidy, and backcrossing to birdsfoot trefoil, or similarly by interspecific somatic hybridization, have shown promise. The molecular approach has so far not been attempted but since genetic transformation can be carried out in Lotus, this avenue should be investigated. Key words: Birdsfoot trefoil, Lotus corniculatus, indehiscence, dehiscence, pod shattering, interspecific and somatic hybridization

OAC Bright birdsfoot trefoil

1997 ◽  
Vol 77 (2) ◽  
pp. 251-253 ◽  
Author(s):  
B. E. Twamley ◽  
D. T. Tomes ◽  
S. R. Bowley
Keyword(s):  
Key Words ◽  
Seed Yield ◽  
Recurrent Selection ◽  
Lotus Corniculatus ◽  
Birdsfoot Trefoil ◽  
Science Department ◽  
Seedling Vigour ◽  
Herbage Yield ◽  
Cultivar Description ◽  
Selection For

OAC Bright is a birdsfoot trefoil (Lotus corniculatus L.) cultivar developed by the Crop Science Department, University of Guelph. It was developed by within and among half-sib progeny recurrent selection for seedling vigour and seed yield. OAC Bright has 2% higher seedling vigour and 0.8% higher herbage yield than Leo. It has similar maturity and persistence to Leo. Key words: Birdsfoot trefoil, cultivar description, seedling vigour, seed yield, recurrent selection

RECURRENT SELECTION FOR SEED YIELD IMPROVEMENT IN LOTUS CORNICULATUS, CULT LEO

1973 ◽  
Vol 53 (4) ◽  
pp. 811-815 ◽  
Author(s):  
G. S. SANDHA ◽  
B. E. TWAMLEY
Keyword(s):  
Seed Yield ◽  
Recurrent Selection ◽  
No Reduction ◽  
Lotus Corniculatus ◽  
Birdsfoot Trefoil ◽  
Phenotypic Method ◽  
Coefficient Of Variability ◽  
Selection For ◽  
Phenotypic Methods ◽  
Seed Yields

Birdsfoot trefoil (Lotus corniculatus L.), cult Leo, was used as a base population for a recurrent selection program for seed yield. Objectives were: (1) improvement of seed yield, and (2) comparison of a genotypic and a geno-phenotypic method of selection. Two cycles were completed and evaluated. Seed yields for the genotypic and geno-phenotypic methods were 132 and 158%, respectively, of Leo after two cycles of selection. The geno-phenotypic method proved superior to the genotypic after each cycle. The broad sense heritability (61% for cycles 1 and 2), genotypic standard deviation, and genotypic coefficient of variability estimates (16.9 and 15.0% for cycles 1 and 2) indicated no reduction in genotypic variability with the geno-phenotypic method. However, the variability was practically exhausted with the genotypic method after cycle 2. Thus, further improvement with additional cycles of selection should be possible with the geno-phenotypic method but not with the genotypic method.

Birdsfoot trefoil (Lotus corniculatus) and greater lotus (Lotus uliginosus) in perennial pastures in eastern Australia. 2. Adaptation and applications of lotus-based pasture

2006 ◽  
Vol 46 (4) ◽  
pp. 521 ◽  
Author(s):  
J. F. Ayres ◽  
M. J. Blumenthal ◽  
L. A. Lane ◽  
J. W. O'Connor
Keyword(s):  
Management Practices ◽  
Lotus Corniculatus ◽  
Low Fertility ◽  
Annual Rainfall ◽  
North Coast ◽  
Birdsfoot Trefoil ◽  
Severe Drought ◽  
Learning Study ◽  
Eastern Australia ◽  
Lotus Uliginosus

This co-learning study with greater lotus (Lotus uliginosus Schukr.) and birdsfoot trefoil (Lotus corniculatus L.) was undertaken in the Perennial Pasture Zone of New South Wales (NSW), Australia, in conjunction with 14 community groups. The overall study combined a field experiment investigating grazing management practices with a co-learning study assessing the adaptation and potential applications of these 2 Lotus species. The present paper reports on the co-learning study. Seventeen sites were established on farms situated in the North Coast, Northern Tablelands, North West Slopes, South Coast and Southern Tablelands regions of NSW. Of the 17 co-learning sites, greater lotus or birdsfoot trefoil was established successfully and yielded useful findings at 9 of 10 sites in northern NSW and 3 of 7 sites in southern NSW. Establishment failure of greater lotus or birdsfoot trefoil at the 5 remaining sites was associated with severe drought conditions at, or shortly following, sowing. Results from across the 4 regions are collated to report on the adaptation of the 2 Lotus species to a diversity of climatic, edaphic and management applications. The study has confirmed that greater lotus is a valuable perennial legume for high rainfall coastal plains, coastal low-lands, coastal hill-country and niche tablelands environments where the average annual rainfall (AAR) exceeds 1000 mm. Significantly, the study shows that birdsfoot trefoil has important potential for low fertility acidic soils on tablelands and slopes where the AAR is 650–1000 mm, especially in northern NSW.

PRIMING AS THE FACTOR OF INCREASE OF EFFICIENCY SEED PRODUCTION OF BIRDSFOOT TREFOIL

2020 ◽  
Author(s):  
Vladimir Zolotarev
Keyword(s):  
Seed Production ◽  
Characteristic Property ◽  
Seed Priming ◽  
Lotus Corniculatus ◽  
Birdsfoot Trefoil ◽  
Germination Energy ◽  
Field Germination

A characteristic property of legumes is the formation of hard-stone seeds. To use such seeds for sowing, it is necessary to carry out measures to increase their seeding indicators. The article provides an overview of methods of pre-sowing preparation of seeds, priming (Seed Priming). The harvest of Birdsfoot trefoil (Lotus corniculatus L.) can contain up to 90% or more hard-stone seeds. Mechanical priming of hard-stone seeds of Birdsfoot trefoil increases their germination energy and field germination.

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