Plant-breeding: Being Six Lectures Upon the Amelioration of Domestic PlantsMacmillan, 1912 - 483 páginas |
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adapted Agric Agriculture anther appear apples atavism beans become bred breeder breeding buds Bull bushels Canna cent characters Chron Citrange color common wheats corn cotton crops cultivation desired discussion dominant ears emasculated emmer evolution experiment stations fact female parent fertile fixed flowers fruit gametes garden grain grow grown hardy heads heredity Hort horticultural hybrids hybrids produced ideal improve inches increase individual Journ Keeney kernels kind Landw large number Luther Burbank male parent Mendel Mendel's law Mendelian method monohybrids mutations N. Y. Mem natural selection nearly offspring organs original P. B. Form pangene peas pistils plant-breeding plums pollen pomelo Proc produce progeny propagated protein qualities races riety secure seedlings seeds sepals sheet shown sown species squash stamens stigma tangelo theory tion tomato true types unlike variable variation varieties vary Vries Webber wheat Winter Fife yield
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Página 32 - On the other hand, we may feel sure that any variation in the least degree injurious would be rigidly destroyed. This preservation of favorable individual differences and variations, and the destruction of those which are injurious, I have called Natural Selection, or the Survival of the Fittest...
Página 30 - And the earth brought forth grass, and herb yielding seed after his kind, and the tree yielding fruit, whose seed was in itself, after his kind: and God saw that it was good.
Página 64 - ... would be an. incomparably better plan to obtain seeds of the required variety, which had been raised for some generations under as different conditions as possible, and sow them in alternate rows with seeds matured in the old garden. The two stocks would then intercross, with a thorough blending of their whole organizations, and with no loss of purity to the variety ; and this would yield far more favorable results than a mere exchange of seeds.
Página 23 - I saw how), from the simple circumstance that the more diversified the descendants from any one species become in structure, constitution, and habits, by so much will they be better enabled to seize on many and widely diversified places in the polity of nature, and so be enabled to increase in numbers.
Página 135 - I will make you the bean," replied the grower. The seedsman then announced in his catalogue that he would soon introduce a new bean, and, in order to hold the name, he published it, along with the announcement. Two years later, I visited the bean-grower. " Did you get the bean ? " I asked.
Página 138 - Limas were introduced in 1889, Burpee in 1890, * Jackson Wonder in 1891, and Barteldes in 1892 or 1893. The variety which is now called the Henderson was picked up twenty or more years ago by a negro, who found it growing along a roadside in Virginia. It was afterwards grown in various gardens, and about 1885 it fell into the hands of a seedman in Richmond. Henderson purchased the stock of it in 1887, grew it in 1888, and offered it to the general public in 1889.
Página 212 - The horny layer, which usually constitutes about sixty-five per cent, of the corn kernel, contains a large proportion of the total protein in the kernel. " The white, starchy part constitutes about twenty per cent, of the whole kernel, and contains a small proportion of the total protein. The germ constitutes only about ten per cent, of the corn kernel, but while it is rich in protein, it also contains more than eighty-five per cent, of the total oil content of the whole kernel, the remainder of...
Página 69 - ... species they are sterile in all possible degrees, until utter sterility is reached. We thus have a long series with absolute sterility at the two ends; at one end due...
Página 87 - We cannot suppose that all the breeds were suddenly produced as perfect and as useful as we now see them ; indeed, in many cases, we know that this has not been their history. The key is man's power of accumulative selection : nature gives successive variations; man adds them up in certain directions useful to him.
Página 69 - ... with pollen from another flower on the same plant, they are sometimes, though rarely, a little more, fertile; if fertilised...