Tetralocular

In Brassica rapa, a genetic locus for tetralocular ovary (teto) was discovered, and it was discovered as the number of locules and the breadth of the silique are linked. Abstract Brassica rapa is a polymorphic species with a wide range of vegetables and oleiferous varieties. The yellow sarson group (subspecies trilocularis), that is predominantly grown in eastern India, is an interesting group of oleiferous kinds. This category comprises lines with bilocular ovaries, a Brassicaceae dening characteristic, as well as lines with tetralocular ovaries. Yellow sarson lines are comprised of a wide silique width, that is accentuated in tetralocular types.

Tetralocular

Brassica rapa is a polymorphic species with a wide range of vegetables and oleiferous varieties. The yellow sarson group (subspecies trilocularis), which is predominantly grown in eastern India, is an interesting group of oleiferous kinds. This group includes both lines with bilocular ovaries, which are a characteristic trait of Brassicaceae, and lines with tetralocular ovaries. Yellow sarson lines are characterised by a wide silique width, that is accentuated in tetralocular kinds.

We used three mapping populations generated from a hybrid between Chiifu (subspecies pekinensis, with bilocular ovary) and Tetralocular ovary to map the locus controlling tetralocular ovary in B. rapa (having tetralocular ovary). The three mapping populations and a population produced from a hybrid between Chiifu and YSPB-24 were used to map QTLs for silique width (a bilocular line belonging to yellow sarson group). The characteristic determining locule number (tet-o) was qualitatively linked to linkage group A4 in B. rapa. In a bilocular/tetralocular hybrid, QTL mapping for silique width revealed a significant QTL on LG A4, which co-mapped with the tet-o gene.

The bilocular/bilocular cross did not reveal this QTL. Bra034340, an Arabidopsis thaliana ortholog of CLAVATA3, was identified as the candidate gene for locule number after saturation mapping of the tet-o area with SNP markers. At position 176 of Bra034340’s coding sequence, a C [right arrow] T transition demonstrated co-segregation with the tetralocular phenotype. Both for understanding evolution under artificial selection and for breeding cultivated Brassica species, the study of silique related features is of relevance.

Semi-Technical Description of a Flowering Plant

The technique for technically or botanically describing a plant is as follows.

Habit

While characterising a plant’s habit, we must examine the plant’s life span, and we must use the terms annual for a one-year plant, biennial for a two-year plant, and perennial for a plant which lives for many years. We must also examine the plant’s nature, size, and general appearance under the habit category. To define the plant’s nature, we must employ the terms herb, shrub, or tree. We can describe the plant’s actual size in the habit description, including whether it’s conical shaped, erect, climbing, twining, and so on.

Roots

While describing the roots, we must establish if the root system is a tap root system or a fibrous root system. A tap root system has a hefty mother root with secondary and tertiary roots with root hairs. In a fibrous root system, there is no mother root; instead, several thin fibre-like roots sprout from the stem’s base. When the roots of that particular plant are visible, we must also notice any root alterations.

Stem

While characterising the stem, we must identify if it is green herbaceous or woody. The stem’s development direction, shape, internal appearance, colour, covering (hairy or smooth), and any modifications found in the stem must all be considered.

Leaves

Whenever characterizing the plant’s leaf for the botanical description, keep the following points in mind. Phyllotaxy refers to the pattern of leaf arrangement at the nodes of a plant’s stem. We must determine if the leaf is directly tied to the plant’s stem or to the plant’s petiole. The leaf’s shape, venation, edge, apex, base, texture, surface, and any modifications must all be taken into consideration.

Perianth

We must describe the perianth whenever the sepals and petals cannot be identified; generally, there is no need. Other aspects, like as the calyx and corolla, must be specified. Perianth (sepaloid or petaloid); other features, including the calyx and corolla, must be detailed.

Tetralocular Meaning

Superior, syncarpous, and bicarpellary are the three types of carpellary. Due to spurious septa, the ovary is essentially bilocular but tetralocular. Carpels are positioned obliquely, and the ovules are persistent.

 Xanthocarpia ochracea is the type species for the genus Notaris. Tetralocular ascospores are seen in this species.

Conclusion

Brassica rapa is a polymorphic plant that comes in a variety of vegetable and oleiferous forms. The yellow sarson group (subspecies trilocularis), that is mostly grown in eastern India, is a fascinating oleiferous species. Both lines with bilocular ovaries, that are a Brassicaceae trait, and lines with tetralocular ovaries are included in this category. Yellow sarson lines have a broad silique width, that is especially noticeable in tetralocular types. We can describe the plant’s actual size in the habit description, including whether it’s conical shaped, erect, climbing, twining, and so on. The three forms of carpellary are superior, syncarpous, and bicarpellary. The ovary is essentially bilocular but tetralocular due to spurious septa. The ovules are persistent and the carpels are positioned obliquely.