Species And Varieties Their Origin By Mutation
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In the summer of 1895 I isolated some atavists of the fifthgeneration of my race, which, by ordinary selection, gave in the averagefrom 20-40% of fasciated stems. My isolated atavists bore abundantfruit, and from these I had the next year a set of some 350 plants, outof which about 20% had broadened and linear rosettes. This proportioncorresponds with the degree of inheritance which is shown in many yearsby the largest and strongest [413] fasciated stems. It strengthens ourconclusion as to the ...innermost constitution of the double races orever-sporting varieties.
Twisted stems and fasciations are very striking monstrosities. But theyare not very good for further investigation. They require too much spaceand too much care. The calculation of a single percentage requires thecounting of some hundreds of individuals, taking many square meters fortheir cultivation, and this, as my best races are biennial, during twoyears. For this reason the countings must always be very limited, andselection is restrained to the most perfect specimens.
What to read after Species And Varieties Their Origin By Mutation?
You can find similar books in the "Read Also" column, or choose other free books by Vries Hugo De to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In the summer of 1895 I isolated some atavists of the fifthgeneration of my race, which, by ordinary selection, gave in the averagefrom 20-40% of fasciated stems. My isolated atavists bore abundantfruit, and from these I had the next year a set of some 350 plants, outof which about 20% had broadened and linear rosettes. This proportioncorresponds with the degree of inheritance which is shown in many yearsby the largest and strongest [413] fasciated stems. It strengthens ourconclusion as to the ...innermost constitution of the double races orever-sporting varieties.
Twisted stems and fasciations are very striking monstrosities. But theyare not very good for further investigation. They require too much spaceand too much care. The calculation of a single percentage requires thecounting of some hundreds of individuals, taking many square meters fortheir cultivation, and this, as my best races are biennial, during twoyears. For this reason the countings must always be very limited, andselection is restrained to the most perfect specimens.
What to read after Species And Varieties Their Origin By Mutation?
You can find similar books in the "Read Also" column, or choose other free books by Vries Hugo De to read onlineMoreLess
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