Pepper plants and fruits with improved nutritional value
View Patent ↗The present invention concerns Capsicum annuum plants producing pepper fruits, exhibiting new physicochemical characteristics of the pepper fruit in relation with chlorophyll A & B, lutein as well as violaxanthin. The pepper fruits of the plants according to the present invention also exhibit a characteristic extreme dark green color at immature stage which color is linked to the content in pigment of the said fruit. The present invention also relates to QTL alleles directing the expression of the pigment content of those pepper fruits as well as molecular markers associated with these QTL alleles.
1. A blocky fruit type Capsicum annuum pepper plant bearing extreme dark green color fruit at immature harvestable stage, said plant comprising two genetic determinants directing or controlling expression of said extreme dark green color in the pepper fruit of the pepper plant wherein said two genetic determinants are represented by two QTL,
wherein the said genetic determinants are the genetic determinants of Capsicum annuum 8728C, seed of which has been deposited under Deposit Number NCIMB 41858 on Jul. 29, 2011,
wherein the first QTL, QTL1, is genetically or physically linked to at least one of marker loci SP436 and SP626,
wherein marker locus SP436 can be identified in a PCR by amplification of a DNA fragment with a pair of oligonucleotide primers: forward primer of SEQ ID NO: 1 and reverse primer of SEQ ID NO: 2 and probe of SEQ ID NO: 9, and
marker locus SP626 can be identified in a PCR by amplification of a DNA fragment with a pair of oligonucleotide primers: forward primer of SEQ ID NO: 3 and reverse primer of SEQ ID NO: 4 and probe of SEQ ID NO: 10,
and wherein the second QTL, QTL2, is genetically or physically linked to at least one of marker loci SP693 and SP694,
wherein marker locus SP693 can be identified in a PCR by amplification of a DNA fragment with a pair of oligonucleotide primers: forward primer of SEQ ID NO: 5 and reverse primer of SEQ ID NO: 6 and probe of SEQ ID NO: 11, and
marker locus SP694 can be identified in a PCR by amplification of a DNA fragment with a pair of oligonucleotide primers: forward primer of SEQ ID NO: 7 and reverse primer of SEQ ID NO: 8 and probe of SEQ ID NO: 12, and
wherein said pepper plant is homozygous at QTL1 and QTL2, and
wherein the extreme dark green color is associated with the following physicochemical characteristics of the pepper fruits at immature harvestable stage:
a content in Chlorophyll B greater than 6 μg/g of fresh weight,
a content in Chlorophyll A greater than 20 μg/g of fresh weight,
a content in lutein greater than 5 μg/g of fresh weight, and
a content in violaxanthin greater than 2 μg/g of fresh weight.
2. A blocky fruit type pepper plant according to claim 1 , wherein the content in Chlorophyll B is greater than 7 μg/g of fresh weight.
3. A blocky fruit type pepper plant according to claim 1 , wherein the content in Chlorophyll A is greater than 25 μg/g of fresh weight.
4. A blocky fruit type pepper plant according to claim 1 , wherein the content in lutein is greater than 6 μg/g of fresh weight.
5. A blocky fruit type pepper plant according to claim 1 , wherein the content in violaxanthin is greater than 2.5 μg/g of fresh weight.
6. A blocky fruit type pepper plant according to claim 1 , wherein:
the content in Chlorophyll B is greater than 7 μg/g of fresh weight,
the content in Chlorophyll A is greater than 25 μg/g of fresh weight,
the content in lutein is greater than 6 μg/g of fresh weight, and
a content in violaxanthin is greater than 2.5 μg/g of fresh weight.
7. A blocky fruit type pepper plant according to claim 1 , wherein:
the content in Chlorophyll B is greater than 8 μg/g of fresh weight,
the content in Chlorophyll A is greater than 30 μg/g of fresh weight,
the content in lutein is greater than 7 μg/g of fresh weight, and
a content in violaxanthin is greater than 3 μg/g of fresh weight.
8. A pepper seed that grows the blocky fruit type pepper plant according to claim 1 .
9. A fruit of the blocky fruit type pepper plant according to claim 1 .