Welkom bezoeker

**beowulf** · 11 January 2015, 03:00

Re: Stabiele Stressbestendige Strains

Regulier geen optie?

Ik heb tot nu toe nog geen problemen gehad met sweet seeds. Blackjack en wild rose voornamelijk. En eigenlijk nog geen verslag tegengekomen waar ze herma uitdraaien. Ik zit nog op een spaanstalig forum, daar kweken er heel veel sweet seeds. En best in het begin veel kans gehad op herma's. Ik negeer de banaantjes in week 8, die vind je bij feminised wel op bijna elke plant.

**HJM** · 11 January 2015, 03:19

Re: Stabiele Stressbestendige Strains

Santa Maria - http://www.nomercyseeds.eu/

Special Fizz - http://www.growshopmarkt.nl/adverten...zz-omni-seeds/
Daar is trouwens de moeder Special van No Mercy. Met dank aan Cees

En talloze andere reguliere soorten.

Als je geen herma's wil moet je eigenlijk alleen regulier zaad gebruiken en dan kan het nog fout gaan.

Dit bericht is samengevoegd wegens dubbelposting.

Ook leuke info:

Two more explanations:

Strawdog's:

HERE IS HOW TO PRODUCE MOSTLY FEMALES FROM STANDARD SEEDS

As a grower I always believed that the seed was genetically predisposed to its sexual orientation as soon as fertilization of the ovule took place in the female. Basically this means that if you take a single female plant and produced seeds from her that the ratios are already set in the offspring. If a gender detection test could be established the males could be separated from the females there are then. If this where true then the breeder’s packs of ten seeds per pack could easily turn out to be all males or all females because of this genetic predisposition. However this is not the case!

One of the areas of my interest was in the feminized seed programs that so successfully charged through-the-roof prices on seeds that are reported to grow all females. However, as many growers here like myself have experienced - this is not always the case either!

Feminized seeds work on the bases that there is a genetic predisposition for the plant to produce females because of special treatment that it gets in the selfing stages of a unique XX female. I won’t go into this in detail here because there is enough information on the process across the entire internet. Anyhow, in an optimal growing environment it is very easy to produce ALL females from these treated female plants. OPTIMAL is the key word here because in less than optimal growing conditions strange things start to happen to these feminized seeds.

In a single pack of feminized seeds a grower can produce:

Females.
Hermaphrodites.
Males.

Yeah, that’s right. Males! So where are these males coming from and how are they making there way into the feminized seed process. The answer is a very simple one. Sex is not completely determined in the cannabis plant until a few weeks before flowering. We will talk about this in a moment but now back to the feminized seeds.>

In optimal growing conditions feminized seeds will kick out 100% females. This says a lot for growing conditions and the actual role they play on cannabis gender development. How many times have growers seen these effects of multiple genders from Feminized seeds? The answer lies clearly in how well they grow. Growers who are growing in non-stressful conditions will never see the male effect from feminized seeds and so hence it does not exist for them. However over periods time and different growing techniques the grower will eventually see these results when growing in less than optional environments. MALES!

For this reason growers who choose feminized seeds should be forewarned to get their growing environments down to a T. If you prevent stress then you prevent males and hermaphrodites appearing in a feminized seed population. It is as SIMPLY AS THAT.

Now onto the real topic of interest. Boosting those female to male ratios.

As many growers know seed banks are not responsible for male to female ratios. If you get a pack of all males, as many of us have done, then a quick call to your seed bank can maybe help procure some good substitute freebies with your second order. However some will not go along with this. It depends on your relationship with the seed bank. Give a shot anyhow, that is my advice, but be discreet and don’t blame the seed bank or breeder.

A couple of years ago Dutch Passion released an essay on how to increase mostly females from a pack of seeds. This is an excellent piece of work and has helped me to gain more of an interest in this area. In the past few years I have come to develop my own systems to get those ratios on the up and up. Right now I am very happy to report a real increase in my females from standard seeds. Sometimes as high as 90% to 95% on a consistent basis. So how is it done?

I prefer standard seeds for numerous reasons. The first reason being that feminized seeds come from hermie plants. Whichever way you look at it, the specially treated plants are hermed and this trait is often expressed in the offspring where conditions are less than optimal. Even with standard seeds the hermaphrodite condition is still achievable where stress occurs. I seem to have noticed that the two most stressful conditions which can cause the hermaphrodite trait occur before flowering in the vegetative phase of growing is around the 3rd to 4th week of growth before pre-flowering when the plant undergoes either heat stress or a problem with the 24/0 or 18/6 photoperiod (whatever vegetative photoperiod choose doesn’t matter, as long as disruptions occur). Even during the initial stages of calyx development males and females are obvious side by side at the node region. This is hermaphroditism due to vegetative growth problems. In the flowering period, hermaphrodites generally occur quicker because of an irregular photoperiod than anything else and heat stress certainly helps bananas to pop up in with the bud. Now, even Sinsemilla crops will herm towards the end depending on the strain. I don’t class this as a typical case of hermaphrodites. It is just something that some strains naturally do towards the end of the Sinsemilla procedure.

Anyhow for starters we better reproduce what Dutch Passion have to say about there feminized seeds first.

"Feminised Cannabis Seeds"
Courtesy of Dutch Passion

In November 1998 we introduced our "Female Cannabis Seed". We did this after our own experiments showed that from female seed, we acquired almost 100% female off-spring.

In the meantime we are six months further on . We have received a lot of feed-back from our customers. The reactions are mostly positive, clients who have successfully produced almost 100% female off-spring. However there have been reactions from customers who found a few hermaphrodites or males plants. Apparently environmental influences affect the sex of the female seeds as well. Because of the fact that Female seeds do not grow into female plants under all circumstances, we changed the name from "Female Cannabis Seeds" into "Feminised Cannabis Seeds".

From literature and from our own findings it appears that the growth of a male or a female plant from seed, except for the predisposition in the gender chromosomes, also depends on various environmental factors. Not only the origination of entirely male or female plants is partly affected by these environmental factors, the number of male and female flowers on a hermaphrodite plant is affected as well. The environmental factors that influence the sex of the plant (or the flower in the case of hermaphrodites), are among other things:

- The quantity of nitrogen and potassium of the seedbed.
- Humidity and moistness of the seedbed.
- Level of temperatures.
- Colour of the light used.
- Length of daylight.
- Stress, any form of stress, makes that more male individuals will originate from seed. Even the taking of cuttings from female plants may produce male or hermaphrodite cuttings.

To optimize the result, changes in one or more of the above-mentioned environmental factors for a certain period during growth, may be applied. During this time these environmental factors will deviate from the standard growing system for maximum harvest and quality, as described in nursery literature. The desired change(s) in the environmental factor(s) are started from the moment that the seedling has three pairs of real leaves (not counting the seed-lobes). This is the moment that male and/or female predisposition in florescence is being formed. After approximately two weeks the standard growing system can be reconverted to.
Of the 5 above-mentioned environmental factors the first three are the most practical:

1. Level of nitrogen and potassium of the seedbed: A heightening of the standard level of nitrogen makes for more female plants originating from the seeds. A lowering of the nitrogen level shows more male plants. A heightening of the level of potassium tends to show more male plants, while a lowering of the potassium level shows more female plants. A combination of a higher nitrogen level for the period of a week or two and a lowering of the potassium level is recommended.
2. Humidity and moistness of the seedbed: a higher humidity makes for an increase in the number of female plants from seed, a lowering for an increase in male plants. The same is valid for the moistness of the seedbed.
3. Level of temperatures: lower temperatures make for a larger number of female plants, higher temperatures for more male plants.
4. Colour of light: more blue light makes for female plants from seed, more red light makes for more male plants.
5. Hours of daylight: few hours of daylight (e.g. 14 hours) makes for more female individuals, a long day (e.g. 18 hours) makes for more male plants.

Now let me just make a few adjustments here to this. You can do whatever you want to your plants in seedling stage and early vegetative stage of growth and it will not effect your final male to female ratios. The time when things should be near perfect is in or around the 3rd to 4th week of vegetative growth. This is the CRITICAL TIME for getting those female ratios up and up. I realized this clearly when noticing how some plants hermed because of problems that occurred around this period of the plants development. If the problems occurred before this time - no herms. So for this reason I surmised that this is when the crucial gender selection is made by the plant. Now I believe that the genders are set in the seed however the environment has a massive impact on how this is expressed in the final phenotypic expression of the plants gender. There are probably many genes that govern this, however lets get into how to up these female ratios.

At the 3rd to 4th week of vegetative growth make sure that your plants are free from stress. No pests attacks, no fungi attacks, no mold, no irregular photoperiod, not underwatered, not overwatered, not pruned or topped, a cannabis friendly soil mix, not recently transplanted, no small pots. If have these basic growing conditions under control then we can move onto the real forces of female production from standard seeds.

N

:K and nutrients. What this simply boils down to is that you have the right nutrients present in the right ratios. A nutrient formulation that has roughly equal parts N, P and K is great but if the P levels go up or the N levels go down you are starting to look at a flowering type food for cannabis. If you do this then your odds of producing mostly females is greatly decreased. Make sure that you get those N, P and K levels to almost run from higher to lower amounts from N to P and K. I have noticed that equal portions of N to P an K can help with the female ratios but the higher N is certainly more helpful. So around the 3rd of 4th week of growth make sure that the ratios are good and that P or K has not gone above the N and P or else more males will occur. Obviously this means to avoid overfeeding your plants around this time too.

Never let your medium dry out completely around the 3rd to 4th week of vegetative growth. If you make sure to water occasionally, but not to overwater your plants, you will get those female ratios on the up and up. Overwatering or drying out of the medium will only produce more males. For consistent results in getting more females keeps those mediums moist.

Humidity. Now this is the tricky one. High humidity levels only promote fungi and mold development and lowering humidity levels is the way to cure most of this rot but by keeping those humidity levels up in or around the 70 rH factor will help to produce more females. If you have a low humidity grow room then you should get to hold of a humidifier. Now high humidity levels like 70rH cause the medium to dry out a lot quicker so you got to keep this under control too. Keep those mediums moist and those rH levesl at 70. This will help to improve those female to male ratios. Again, getting them on the up and up.>

If you run the 24/0 photoperiod then do not allow those temps to go anywhere above 85 unless you have an equatorial strain. 75 is the best but going a little lower is not a problem for helping those female ratios. If you can get in at around 65 then those females are going to be popping up all over the place. The problem with this is that some growers like to use the 18/6 photoperiod and when the lights are off the temps drop from around 65 to 50 and even less. Try not to be below 55 because this has the adverse effect on the plants producing more males than females. Again between 65 and 75 is where you want to be during the 3rd to 4th week of vegetative growth, the preference being 70.

Invest in a MH Light for vegetative growth. Dump the HPS bulb for flowering later. I have noticed that HPS lighting during vegetative growth simply sends those males to female ratios all over the place. With MH lamps the females are everywhere. Invest in some MH HID lights. It makes all the difference in getting those females to show more often. This is worth repeating! MH Bulbs produce more females under optimal conditions especially if they are present during the 3rd and 4th week of vegetative growth. Surprising enough you can start seedlings under HPS and it will not have an effect on those female ratios. Again the 3rd to 4th week of vegetative growth is what is important here.

No stress during the 3rd to 4th week of vegetative growth. That is all there is to it. If you got your garden growing in optimal conditions without plant stress then the impressive 90% to 95% females start to emerge from standard seed packs. I find that topping is best done at the second to third week of vegetative growth but that this is a little stressful and can lead to those female ratios dropping again. Avoid topping or pruning if you are looking to up the female count.

That is all I have to say for the moment. These little snippets of information in conjunction with what DP uncovered have helped my female ratios considerably. Hopefully you can see the same results too. Have fun getting those environments optimal for females!!!!!!!!

strawdog

and

Seedsman Seeds website:

Feminised Cannabis Seeds Information

In Greek mythology, Hermaphroditus, the son of Hermes and Aphrodite was fused with a nymph, Salmacis, resulting in one individual possessing physical traits of both sexes.

Hermaphroditism is a natural trait that occurs spontaneously in cannabis plants in the wild as a final emergency response to the absence of either sex in a colony. The mechanism allows the plant to self-pollinate by producing both female and male flowers. Most dioecious (distinctively male or female) plants have apparently evolved from hermaphroditic ancestors, so the trait remains partly active in many species of plants. Although this trait prevails in many pure sativa lines, it has been largely outbred from modern commercial hybrids. Usually it’s the female plants that produce staminate parts although reversal of both sexes has been reported by growers. Seemingly normal dioecious individuals can display this trait when they are grown in unfavorable environmental conditions. Some examples of things that might affect the sex of cannabis plants include high and low temperatures, ph fluctuations, plant hormones, light leaks in the grow room, water related stress and overfertilsation. In this sense there are no true males or females, only dioecious individuals with a greater or lesser potential for the dual-sex state.
[IMG]file:///C:/Users/bert/AppData/Local/Temp/msohtmlclip1/01/clip_image001.jpg[/IMG]
Female plants will most likely turn if they are genetically prone to the condition. Once turned, the females will form modified or incomplete pollen sacks that look like tiny bananas. The change often goes unnoticed because the bananas start growing right out of the bud and they are difficult to spot with the naked eye. The pollen from these hermaphroditic females can either be fertile or sterile. If the pollen is fertile, she usually ends up pollinating all the plants in the grow room, effectively ruining the entire sensimillia crop. Plant stability is measured by how much stress they can handle and highly stable female plants will not turn into hermaphrodites no matter how much environmental stress you subject them to. These are the females that we are looking for when we want to make feminised seeds.

Generally speaking, hermaphroditism is considered an unwanted trait in drug strain cannabis plants. The trait is dominant in its expression, which means that any parent carrying this trait will pass it on to its offspring. There are however some uses for this trait, which include making feminised seeds. By removing the Y chromosome from the equation, we are left with nothing but female offspring. The reason why these seeds exist in the first place is because they remove the need to sex the plants before flowering them, which can save growers a lot of time and trouble. Unwanted male plants take up much needed space in the grow room and female clones need a lot of care. Feminised seeds eliminate those problems because they will produce female plants 99% of the time (the remaining percentage makes room for spontaneous genetic anomalies).

The main concern with making feminised seeds is that in order to create them, we have to allow a hermaphroditic female to pollinate itself or another female plant in order for the offspring to carry only female genes. This is problematic because we don’t want the offspring to become hermaphroditic as well. The females that are easily pushed towards hermaphroditism are usually removed from the grow room before they have the chance to pollinate themselves and other females. Seeds from these plants are usually highly unstable and produce one generation after the other of mostly hermaphrodites. Not exactly what we are looking for. So only the most stable and tolerant plants will be eligible for making female seeds. What we are looking for is only the slightest expression of this trait, anything else would defeat the purpose of what we are trying to do. By using only relatively stable females for our feminised cross, we decrease the chance of getting hermaphrodites further down the line. After all, what we want is a constant supply of normal and stable female plants suitable for indoor cropping, not a bunch of hermaphrodites pollinating each other all over the place.

We start by manipulating the environment in order to find the plants that can handle the greatest degree of stress without any significant adverse effects. The more they can handle the better. This screening process is crucial for creating stable female seeds. Using two plants, one normal and one hermaphroditic female will give us the best result because we get recombination of genes from both the female parents, while self-pollination is basically inbreeding. Self-pollination is sometimes used to isolate traits in rare female clones that would otherwise be lost but it might also give rise to genetic depression, mutations and all sorts of physical disorders. In both cases the offspring will carry only female genes but the seeds from the selfed female would be genetically less diverse and might result in fewer healthy individuals. Naturally the normal female used in our cross would also have to be stress-tested and proven stable for good results. Once we have found a strong female candidate, we can start making feminised seeds. We need a catalyst to start the process and silver water is usually administered to the female plants at this point. The stress from the tiny but toxic silver particles is just too much for the female to handle, so she responds by reverting to the dual-sex state and starts producing male flowers.

There is also another method for creating feminised seeds called rhodelisation, which was developed by the breeder Soma.

Rhodelisation means that you allow a female plant to flower for an unnaturally long period of time in order for it to produce a few male flowers. Remaining unfertilised late in the season constitutes a problem for the female plant so she tries to self-pollinate in order to preserve her genes. This method is substantially more time consuming but it provides a natural way of producing feminised seeds without subjecting the plants to extreme levels of stress. It is however not an alternative if time is a factor and that is usually the case. This method takes about twice as long to complete, depending on the flowering cycle of the strain that is feminised.
High quality commercial seeds from feminised plants should therefore in theory give rise to mostly normal females that are resistant to the hermaphroditic condition. This is what we can hope for but it’s not always the case. Different breeders use different methods but usually there won’t be any problems if the plant is grown in near optimal conditions. Stress is the trigger that launches the hermaphroditic trait so there is always a degree of caution involved when growing these plants. Keeping a close eye on them is essential. On the positive side, feminised plants are a breath of fresh air because the problem of identifying females and hoping for as many as possible is eliminated. If 10 female seeds are planted, 10 female plants will grow.

**Greyvol** · 11 January 2015, 08:42

Re: Stabiele Stressbestendige Strains

Thanx, dat is nog eens duidelijke info

**ceBep** · 11 January 2015, 12:26

Re: Stabiele Stressbestendige Strains

Regulier zaad heeft inderdaad minder last van herma trekjes, geen onverwachte problemen mee gehad.

**MWay** · 11 January 2015, 13:40

Re: Stabiele Stressbestendige Strains

Pa en ma zijn ook belangrijk,als dat in alle opzichten beauty`s zijn dan kunnen ze wel wat hebben op vals licht na.

**psychedelic1988** · 12 January 2015, 00:22

Re: Stabiele Stressbestendige Strains

Zolang je niet uit gaat van die verkoop praatjes en idd uit gaat van verslagen kan je nooit fout zitten.
Ik zou sowieso wel overstappen naar regulier dan is de kans al stukken kleiner dat je herma's krijgt.

Zo heeft mijn gdp moeder 2x zware lichtstress ondergaan bij de selectie en ze maalde er niet eens om

Zo heb ik met de zaden van hjm ook nog nooit problemen meegemaakt, gezien of gehoord.

mja zo zijn er duizenden goeie zaden het is alleen even weten waar je moet zoeken.

**QnQ** · 12 January 2015, 10:51

Re: Stabiele Stressbestendige Strains

Eerste wat ook in mij opkwam is: Santa Maria.
Lekker wietje ook. en omdat die zo stabiel is, smaakt die bij elke coffeeshop ongeveer hetzelfde.
Een Santaatje herken je zo als roker.
2012-06-14-Santa.jpg joint.gif

**MWay** · 12 January 2015, 10:55

Re: Stabiele Stressbestendige Strains

Denk dat die van jouw net een stuk beter smaak als in de gemiddelde coffeeshop Q.

**WeedFan** · 12 January 2015, 12:28

Re: Stabiele Stressbestendige Strains

Hahaha. Dit is pas mijn eerste kweek. Maar die van mij hebben ook al aardig wat verdragen hoor! Koude temperaturen enzo. Eentje was half geplet en is helaas gehandicapt geworden. Maar ze doen het goed. En geen herma's. Waren goedkope zaden. White widow van freeseedsonline.nl

**grinderke** · 12 January 2015, 18:56

Re: Stabiele Stressbestendige Strains

ik zou zeggen white widow en santa maria en ak47 en top44 powerplant
(die broodkweeksoorten) zijn denk ik meestal goed anti hermannen

**HJM** · 12 January 2015, 20:43

Re: Stabiele Stressbestendige Strains

Als SM een "broodkweeksoort" was, zou Cees niet zo arm zijn

**grinderke** · 12 January 2015, 22:54

Re: Stabiele Stressbestendige Strains

Oorspronkelijk geplaatst door HJM View Post

Als SM een "broodkweeksoort" was zo Cees niet zo arm zijn

fout verwoord

**soulrebel** · 12 January 2015, 23:58

Re: Stabiele Stressbestendige Strains

Tot zover ik mee ben

serious seeds(ben nu 1tje serieus aan het test stressen,na 2maanden nog niets van te merken) de lekkerste van men vorige 3 auto's,lowryder met santa genen in,dus santa maria de Brasil

Als die zo vaak in de prijzen/kruisingen valt,zal die wel ok zijn

**Stemma** · 8 February 2015, 18:31

Re: Stabiele Stressbestendige Strains

8 februari , lijst opgesteld in eerste bericht. aanvullingen zijn welkom

Welkom bezoeker

Forum Top Ad MOBILE Smallest

Mededeling

Stabiele Stressbestendige Strains

Stabiele Stressbestendige Strains

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment