Yields of mixtures of single-cross hybrid field beans (<i>Viciafaba L.</i>) with one of the parental inbred lines

Bond, D. A.; Fyfe, J. L.; Toynbee-Clarke, Gillian

doi:10.1017/s0021859600068325

Cited by 8 publications

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References 3 publications

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“…In order to establish whether the mitochondrial inheritance hypothesis of the cytoplasmic male sterility can be generalized to other species, we have characterized the two male-sterile cytoplasms presently available in faba beans (Viciu faba L.). The cytoplasm 447, first described by Bond et al [9] expresses the male-sterile phenotype when associated with a recessive maintainer gene. In these conditions, the male-sterile plant cells contain cytoplasmic spherical bodies [lo] made of a circular unit membrane containing a high-molecular-weight RNA [I 1,121.…”

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Mitochondrial Modifications Associated with the Cytoplasmic Male Sterility in Faba Beans

Boutry

Briquet

1982

Eur J Biochem

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Isolated mitochondria of faba beans carrying two different determinisms of the cytoplasmic male sterility (cytoplasms 447 and 350) have been compared to fertile lines.1. In addition to the major mitochondrial DNA, five small DNA species (in the range of 1000-2000 base pairs) were detected by agarose gel electrophoresis in the four cytoplasms. An additional small D N A species was found specifically in the cytoplasm 350. After endonuclease restriction of the mitochondrial DNA, the patterns obtained for both male-sterile cytoplasms were identical to each other but distinct by two to four fragments from the patterns obtained for male-fertile cytoplasms.2.[3sS]Methionine labeling in situ of the mitochondrial protein synthesis revealed an additional polypeptide (M, = 25000) detected only in the two male-sterile cytoplasms.3. The male-sterile cytoplasm 350 showed a decrease of the respiratory state 3 of oxygen uptake during oxidation of NADH or malate + pyruvate. This decrease is thought to reflect a smaller capacity of the respiratory chain. These specific mitochondrial modifications support the hypothesis of a mitochondrial localization of the cytoplasmic male sterility determinant in faba beans.Little is known concerning the molecular interactions between the nuclear and the cytoplasmic genetic information in plants. One of the best studied systems is that of cytoplasmic male sterility, a powerful tool for the commercial production of hybrids. The mitochondrial inheritance of cytoplasmic male sterility is well supported in maize by different biochemical observations. (a) Restriction analysis of the isolated mitochondrial D N A shows specific modifications in malesterile cytoplasms [1,2]. (b) Kemble and Bedbrook have reported the presence in mitochondria of small linear and circular DNA molecules, the number and the size of which are specific for each cytoplasm [3]. (c) Radioactive labeling of the mitochondrial protein synthesis shows that each malesterile cytoplasm contains an additional polypeptide of a specific molecular weight [4], the synthesis of which is under the control of nuclear restorer genes that suppress the malesterile phenotype [5]. (d) The toxin produced by Helminthosporium muydis (race T), responsible for the blighting of the plants carrying the cytoplasmic male sterility of T-type, affects specifically the functions of the mitochondria isolated from that cytoplasm [6].Modifications of the restriction patterns of mitochondrial DNA from cytoplasmic male-sterile lines of wheat [7] and tobacco [S] also suggest the involvement of mitochondria in the species analyzed. In order to establish whether the mitochondrial inheritance hypothesis of the cytoplasmic male sterility can be generalized to other species, we have characterized the two male-sterile cytoplasms presently available in faba beans (Viciu faba L.). The cytoplasm 447, first described by Bond et al. [9] expresses the male-sterile phenotype when associated with a recessive maintainer gene. In these conditions, the male-sterile plant cells cont...

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Mitochondrial Modifications Associated with the Cytoplasmic Male Sterility in Faba Beans

Boutry

Briquet

1982

Eur J Biochem

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“…It would be necessary to determine the proportion of male-fertile plants in the mixture which would allow adequate pollination of the male-steriles and minimum loss of yielding ability in the hybrid due to dilution by inbreds. Bond, Fyfe & Toynbee-Clarke (19666) have shown that in one hybrid, 30% of an inbred parent can be tolerated without measurable loss of yield.…”

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Behaviour of bees visiting male-sterile field beans (Vicia faba)

Bond¹,

Hawkins²

1967

J. Agric. Sci.

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“…In fact the spring-wheat results from trial 1 suggested that high yields of wheat mixtures are dependent not on large inter-plant competition effects as in pearl millet but on the reverse, since mixtures only outyielded their mid-component values at low seed rates where inter-plant competition was at a minimum. Bond, Fyfe & Toynbee Clarke (1966) investigated mixtures made up of different proportions of a single cross hybrid field bean and the selfed fertile phase of its female parent. Two such series of mixtures were investigated and it was noted that the contrast in vegetative vigour was greater between one female parent and the hybrid derived from it than between the other female parent and its hybrid derivative.…”

Section: Competition and F X Hybrid Varietiesmentioning

confidence: 99%

Inter-varietal competion and its possible consequences for the production of F₁ hybrid wheat

Sage

1971

J. Agric. Sci.

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SUMMABYThe graphical and statistical analyses of competition diallels devised by Durrant were applied to an experiment investigating competition between four spring-wheat varieties. The results indicated that at low seed rates mixtures between varieties having a wide phenotypic difference between them in competitive characters, such as height and early maturity, could significantly outyield pure-stands of the component varieties. However, the results of a second experiment, in which these mixtures were grown at a range of seed rates, indicated that the yield advantage of mixtures over pure-stands was unlikely to occur at normal seed rates.

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Yields of mixtures of single-cross hybrid field beans (Viciafaba L.) with one of the parental inbred lines

Cited by 8 publications

References 3 publications

Mitochondrial Modifications Associated with the Cytoplasmic Male Sterility in Faba Beans

Mitochondrial Modifications Associated with the Cytoplasmic Male Sterility in Faba Beans

Behaviour of bees visiting male-sterile field beans (Vicia faba)

Inter-varietal competion and its possible consequences for the production of F₁ hybrid wheat

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Yields of mixtures of single-cross hybrid field beans (Viciafaba L.) with one of the parental inbred lines

Cited by 8 publications

References 3 publications

Mitochondrial Modifications Associated with the Cytoplasmic Male Sterility in Faba Beans

Mitochondrial Modifications Associated with the Cytoplasmic Male Sterility in Faba Beans

Behaviour of bees visiting male-sterile field beans (Vicia faba)

Inter-varietal competion and its possible consequences for the production of F1 hybrid wheat

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Inter-varietal competion and its possible consequences for the production of F₁ hybrid wheat