BORTOLINI, F.

DUARTE, J. G.

MITTELMANN, A.

PIRES, E. DA S.

ROSA, T. C.

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3378 - Crop Breeding & Genetics  Fernanda BortoliniMORPHOLOGICAL AND AGRONOMIC TRAITS OF THREE ARROWLEAF CLOVERPOPULATIONSBortolini,F; Duarte,JG; Mittelmann,A; Rosa,TC; Pires,ES; Embrapa Temperate Agriculture; Embrapa Temperate Agriculture; Embrapa Temperate Agriculture;Embrapa Temperate Agriculture; Embrapa Temperate Agriculture; The Arrowleaf clover (Trifolium vesiculosum) is a cool season annual forage specie with highpercentage of hard seed and good reseeding ability. The objective of this study was to comparemorphological and agronomic traits of three Arrowleaf clover populations: TV01 (selected from thecultivar Embrapa-28 'Santa Tecla'), TV02 and TV03 (derived from cv. Yuchi). The field experimentwas carried out at the Lowland Experimental Station of Embrapa Temperate Agriculture, at the cityof Capão do Leão, RS, Brazil. The experimental design was a randomized block design with 13replications. Sowing was done on May 12th of 2011, using pelleted seeds with specific Rizhobiuminoculant (SEMIA 2050 + 2051), in rows of 14 m spaced 0.20 m. The evaluations were performed onsix plants per line to the following traits: plant height at 90, 120 and 130 days after seeding, plantdiameter, initial vigor - visual notes from 1 (lowest) to 5 (highest); central leaflet length and width;leaf color - visual note from 1 (light green) to 5 (dark green), petiole length, number ofinflorescences, fresh and dry forage yield and dry leaf yield. There were significant differencesamong the populations for plant height at 90 days, diameter, initial vigor, fresh and dry forage yieldand dry leaf yield. The highest values were observed for the populations TV01 and TV02, which didnot differ significantly, but differed from the population TV03. Dry forage yield of the populationsTV02 and TV01 populations were 6432 and 6689 kg/ha, respectively, while population TV03 yielded4682 kg/ha. The same was found for dry leaf yield, with 1838.70 and 2246.49 kg/ha to TV01 andTV02 and 1209.18 kg/ha to TV03. In relation to height, diameter and initial vigor, TV01 had 9.82 cm,15.45 cm and 4.04, respectively. TV02 did not differed from TV01, with 9.67 cm, 15.52 cm and 4.12and TV03 differed from the previous two with 8.30 cm, 14.23 cm and 3.16. The variables, length andwidth of central leaflet did not differ among populations, with 5 and 3 cm in average, respectively, aswell as the average length of petiole with around 14 cm for the three populations. There weredifferences among populations for morphological and agronomic traits. Both populations TV01 andTV02 had better initial development as well as better forage production when compared topopulation TV03.

Morphological and agronomic traits of three arrowleaf clover populations.

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