id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
afs-71538	Pohjakallio, Onni; Karhuvaara, Laura	Resistance to virus diseases of some F1 clones descended from the species hybridization Solanum demissum x S. tuberosum	1960	8	.pdf	application/pdf	3415	191	68	The results of core grafting infections Distance from virus- Clone No. of Percentage diseased ear (colour Piece tubers of plants potato plants of tuber) inserted grafted infected m. 1956 purple 15 20 10 —»— *— carrying a bud 20 65 10 — »— — »— no bud 20 65 10 1957 — »- 33 36 10 —carrying a bud 22 59 10 no bud 13 62 10 1959 - 50') 24 50 —»— —no bud 49 *) 100 50 1956 white 10 0 10 —»— * carrying a bud 20 0 10 *— —no bud 20 0 10 1957 —*- - 21 0 10 * *— carrying a bud 20 0 10 — »— no bud 21 0 10 1) For setting, the tubers were cultivated in specially isolated plots in 1958, when symptoms of early maturity were observed in one of the 50 plants; this plant was eliminated on August 4. types of potato plants were cultivated at distances of only 1.2 metres from each other, transformation into an earlier maturing type of plant was more frequent than when the plam;s of the original type were cultivated in special isolated plots. Results in 1956 Results in 1957 Results in 1958 Results in 1959 Year of No. of Tubers Year of No. of Tubers Year of No. of Tubers Year of No. of Tubers infect- plants g/plant infect- plants g/plant infect- plants g/plant infect- plants g/plant ion ion ion ion 1952 3 87 1952 3 145 1952 3 119 1952 3 59 1953 3 83 1953 2 256 1953 3 92 1953 3 46 1954 12 170 1954 3 202 1954 3 257 1954 3 86 1955 6 57 1955 7 75 1955 2 66 1955 3 11 1956 5 124 1956 6 257 1956 3 106 1956 5 39 Healthy 28 330 1957 13 536 1957 5 75 1957 9 30 plants Healthy 10 526 1958 16 120 1958 5 55 plants Healthy 11 218 1959 31 247 plants Healthy 3 258 plants 77 considered quite conclusive.	cache/afs-71538.pdf	txt/afs-71538.txt