RESEARCH REPORTS A spontaneous mutant with lower leaves albino and non ripening fruit.   Avdeyev, Y.I. Vegetable Crops Selection Laboratory. All-Russian Scientific Research Institute of Irrigated Vegetable and Melon Growing. P.O. Box 93, Astrakhan, 414000, Russia. From 2800 plants of the variety of Ranny Ora-94 (Ora, TM-2, BER, ü, 0-80-120 g, sp-50-60 cm), growing under field conditions were found 3 plants with lower albino leaves and non ripening fruit. The mutant kept the full complex of variety traits, including high yielding capacity. Before forming 5-7 leaves mutant plants are normal green coloured. Later the lower leaves grow up to become light and white. The whitish is spreading from bottom to upwards. From 8-10 leaves the upper 4-5 remain green. Fruit of the mutant are non-ripening. Under white surface of fruit the pulp has yellow colour (pale) and acid taste. Fruits became weakly pink in colouring. Seeds are well developed. The F1-hybrids between mutant and standard varieties do not differ from normal plants. In F2 populations, the segregation of normal and mutant plants was 23:7, 19:6 and 14:6, that evidence monohybridic inheritance (ƒ´2 = 0.04; 0,01 and 0,27). The found gene may be preliminary named as lanr (lower leaves albino and fruit not ripening). lnheritance of resistance to fruit cracking.   Avdeyev Y.I. and Ivanova L.M. Vegetable Crops Selection Laboratory. All-Russian Scientific Research Institute of Irrigated Vegetable and Melon Growing. P.O. Box 93, Astrakhan, 414000, Russia. Among our tomato samples, varieties Mashinny and Richanskywere found to be resistant to fruit skin cracking under field conditions. Varieties susceptible to skin cracking, G-A-8 and Dragotsennost 341, under the same conditions, have 15-30% of total yield of matured fruits as cracked fruit. For studying the inheritance of resistance, the resistant Richansky and susceptible Dragotsennost 341 were crossed. In the experiments, 30-day seedlings of parents and hybrids were transplanted into the test plot at 70x35 cm (with one plant each) spacing. To stimulate fruit cracking, water was restricted during the period of forming of mature-green fruits in the 1-3 clusters. When the plants had formed fruits in the 3-5 clusters, an abnormally high quota of mineral fertilizers, (potash and ammonium nitra) at a dose K-60g N-30g individually for each plant, was applied. After that, plants were well watered. Fruit cracking was scored after 10 days by measuring total length of cracking on ripe fruits followed by calculation of its average length per matured fruit per plant (1994) or, alternatively, cracking was scored by common index of damage of all ripe fruits on each plant using a 6 level scale; 1 - cracking 0.1-10%; 2 - 10.1-20%; 3 - 20.1-30%; 4 - 30.1-40%; 5 - more 40% (1996).

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